Mechanical Analysis Updates in Ansys 2021 R1 – Webinar

Ansys 2021 R1 delivers significant improvements in simulation technology together with nearly unlimited computing power to help engineers across all industries reimagine product design and achieve product development goals that were previously thought impossible. 

With updates made to Ansys mechanical, users can easily handle the complexity of a variety of design environments. Everything from mulitphysics analysis to dynamic simulation allows for the ability to create a product that meets performance goals and holds up over time. 

Join PADT’s Application Engineer Robert McCathren for a look at analytical advancements in Ansys Mechanical 2021 R1, including updates for: 

          ​​​​• Element Technology

          • NonLinear Adaptivity

          • Coupled Physics Analysis

          • Linear Dynamics

          • Contact

          • And much more

Register Here

Running Ansys Fluent on Ansys Cloud using a Journal File and a UDF

Cloud computing is becoming more and more popular with the recent changes in the work environment, and Ansys Cloud solution is no exception. While running a Fluent simulation on the Ansys Cloud is now a more familiar task among CFD users since its introduction around a year ago, there are still some cases that might be challenging and need more attention. One of these cases is performing a Fluent simulation using a UDF.

The first thing users might notice when launching an Ansys Cloud Fluent job through the ACT extension is that the UDF files won’t be uploaded, which is why they might see their cases are failing if they don’t pay extra attention. In order to avoid this issue, users must follow one of the options below.

The first and most commonly used method to launch a Fluent job with a UDF is via the CLI (Command Line Interface). With this method, the .c and all other files in the working directory will be uploaded to the Cloud. Then UDF will then be compiled on the Cloud.

Since the Cloud computers already have compilers installed, one doesn’t need to anything special. The local directory should have .c file, case file with UDF plugged-in, and a journal file. As a side note, Ansys Fluent 19.3 and higher supports expressions that can be used to define boundary conditions instead of UDF. Starting with Ansys Fluent 2020R2, the C compiler is built-in with the software. Please refer to the product documentation.

We highly recommend that the user should have the required compiler installed locally to compile, hook, and test the routine before submitting it to the cloud.

If you have not used CLI to submit a Fluent job to the clouds, please read the article below:

https://cloudforum.ansys.com/t/80njy9/how-to-running-fluent-on-cloud-using-a-journal-file-and-udf

In short, you have to open a command prompt (cmd.exe) and navigate to your working folder. This folder should contain all the Fluent input files needed for the run: journal file, case file, etc. Once you login using ansyscloudcli command, you are ready to submit your job on the cloud.

Below is a common example for the commands to run Fluent on the cloud:

ansyscloudcli runfluent -j fluent_via_journal --jou tjunction.jou –q Flexible_eastus_Standard_HC44rs_2020r2 -n 1 -m 36 -v 2020r2

Here is some description of these commands:

> AnsysCloudCLI runFluent -j <job name> [--jou <journal>] -q <queue>  [-n <num nodes>] [-m <max cores>] -v <solver version>
-j: job name
-q: name of the queue 
    (run: ansyscloudcli getQueues, to get a list of all queues. Queue name is case sensitive)
-i: name of the input file for the solver
--jou: journal to execute (if set, -i is not used)
-n: number of nodes
-m: (optional) max number of cores. Useful if you want to make a run with 4 cores on a computer with 16 cores
-v: target solver version

The second method is to compile the UDF locally and upload all files to a virtual desktop infrastructure (VDI) session. Then the compiled UDF can be used with Fluent through the VDI session. Note that the UDF can’t be compiled on a VDI session with versions 2020R2 and earlier.

Lastly, with 2021R1 Fluent has a built in Clang compiler which will allow you to compile a UDF in a VDI session. However, the Clang compiler still won’t allow you to submit a Fluent job with a UDF through the ACT.

Ansys Cloud VDI solution running on a local desktop via RDP

All Things Ansys 085: Additive & Structural Optimization Updates in Ansys 2021 R1

 

Published on: April 5th, 2021
With: Eric Miller & Doug Oatis
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Lead Mechanical Engineer, Doug Oatis in order to discuss what is new with regards to additive and structural optimization in Ansys 2021 R1.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

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Experience Stratasys: Manufacturing – Virtual Reveal

In one blockbuster event, Stratasys will unveil the most complete set of new, best-in-class, additive manufacturing solutions the industry has ever seen.

From tooling and jigs and fixtures to mass production of end use parts, Stratasys is redefining speed, productivity, and agility in manufacturing.

Wednesday, April 28th, 2021 – 9:00 am CST

Register today to join us for a 30-minute virtual live reveal with Stratasys CEO Yoav Zeif. After Yoav’s exciting overview, we’ll conduct detailed breakout sessions and demonstrate how each of these new solutions will transform your manufacturing operations and help you seize a competitive advantage.

Secure your spot now – you don’t want to miss this unparalleled event!

Register Here

Thermal Integrity Updates in Ansys 2021 R1 – Webinar

With CAD-centric (mechanical and electrical CAD) and multiphysics user interfaces, Icepak facilitates the solving of today’s most challenging thermal management problems in electronics products and assemblies. Icepak uses sophisticated CAD healing, simplification and metal fraction algorithms that reduce simulation times, while providing highly accurate solutions that have been validated against real-world products.

This tool provides powerful electronic cooling solutions that utilize the industry leading Ansys Fluent computational fluid dynamics solver for thermal and fluid flow analyses of integrated circuits, packages, printed circuit boards, and electronic assemblies.

With the release Ansys 2021 thermal integrity capabilities saw improvements in a variety of areas. Join PADT’s Application & Support Engineer and Thermal Integrity expert Josh Stout to learn more about recent advancements surrounding: 

• Solar Radiation Modeling

     • Robust Meshing Distribution

     • Dynamic Thermal Management

     • The Release of AEDT Mechanical Solutions

     • And Much More

Register Here

If this is your first time registering for one of our Bright Talk webinars, simply click the link and fill out the attached form. We promise that the information you provide will only be shared with those promoting the event (PADT).

You will only have to do this once! For all future webinars, you can simply click the link, add the reminder to your calendar and you’re good to go!

All Things Ansys 084: The State of Mechanical Meshing in Ansys 2021

 

Published on: March 22nd, 2021
With: Eric Miller & Joe Woodward
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Senior Mechanical Engineer and Lead Trainer, Joe Woodward in order to discuss what new mechanical meshing capabilities are available in Ansys 2021.

Meshing is an integral part of the engineering simulation process where complex geometries are divided into simple elements that can be used as discrete local approximations of the larger domain. The mesh influences the accuracy, convergence and speed of the simulation. Furthermore, since meshing typically consumes a significant portion of the time it takes to get simulation results, the better and more automated the meshing tools, the faster and more accurate the solution.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

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A PADT Engineer in King Attiball’s Court – Chapter 2

There just is not enough engineer-focused fiction out there. Romance, Horror, Sci-Fi, Young Adult, Historical, Mystery, etc. They all do well, but they are rarely written for the engineers of the world.

Here at PADT, we are all about undoing such injustices. We decided to brainstorm a story about an engineer who does simulation and 3D Printing and ends up on an adventure. We hope they will find some mystery, some science fiction, and some horror. Maybe even a little romance. To develop the characters and the plot we all got on an MS Teams meeting and blocked it out. It was a lot of fun. That turned into an outline, that will turn into a chapter every month.

We hope you enjoy the result as much as we enjoyed dreaming the journey up.

It should be noted that every character in this story is completely made up. Sometimes we steal some names from real people as a shoutout to them, but that is about it. PADT does not have a basement or a fancy cluster in one. Everything is made up. Well, almost everything. We do have a stack of furniture in the back of shipping and receiving.


Read Chapter 1: Batch Submission


Chapter 2
New Friends

“Tastes like sand.” That was the first thought Ash had as she began to wake up. The crunch she felt on her teeth and the nasty flavor reminded her of the time her brother buried her on the beach.

It was definitely sand.

As she became more aware, she realized it was in her nose as well. When she moved her hands, she felt more hot, dry sand. Laying there, trying to figure out what happened, she noticed the sound of waves and then seagulls.

The last thing she remembered was trying to keep her balance after submitting her CFD batch run on PADT’s new supercomputer. Passing out and waking up on what appeared to be a beach was not the usual result of pressing return on a batch command. Even if it was the wrong command. For a few seconds, she wondered if she was in a virtual reality simulation. But the gritty sand in her mouth was real. Her slowly reviving brain latched on to the idea that a good next step was to open her eyes.

She said, “OK, seagulls, let’s see what you look like.”

Ash was met with a view of a blurry beach with waves slowly working their way up and down a stretch of sand about thirty feet away. She tried to lift her head to look around, but her body did not cooperate.

“Let’s try toes.”

She was able to move those, but didn’t feel sand. Good, it seemed her hiking boots were still on. She was able to move her arms slightly across the warm sand.

“Progress,” was her comments to the gulls she could see skimming the shoreline, occasionally diving into the water.

Before she found the strength to lift her head again, she heard voices. It sounded like two children. As the sound became louder, she could tell they were not speaking English. With a start, she realized they were talking to each other in a heavily accented version of Phoenician.

Ash heard what sounded like a little girl shout, “On the beach, see, it’s a goddess!”

This was followed by a boy’s voice responding, “No, it’s just a foreigner. Probably a slave.”

Ash said in English, “I am neither a goddess nor someone’s slave, thank you very much.”

Using as much strength as she could muster, she raised herself up and faced the two kids.

Ash spat out some sand and croaked, “Where am I?” in her best Phoenician.

Both the kids were thin with dark olive skin and long, kinky black hair. They were both wearing torn and dirty tunics, and they stared at Ash with a mix of fear and curiosity. The boy held a long stick, which he raised and used to poke Ash in the shoulder.

“Ouch!”

The girl said, “She talks as funny as she dresses.”

Ash took a deep breath and tried again, speaking slowly. “What. Place. Are. We. Near?”

Poking her again, the boy answered, “Sur. The center of the world.”

Ash recognized the Phoenician name for the ancient city of Tyre on the coast of what is now Lebanon. She remembered studying it in college and how it was built on a rocky peninsula that jutted out into the Mediterranean. Looking up the beach, she could now see beige stone walls rising from cliffs that protruded into the water. Smoke rose from behind the walls and a few tall masts poked up above the city.

This made no sense. Ash’s head began to spin as the craziness of the situation hit her. She was sitting on a beach, speaking with two children in ancient Phoenician, and what appeared to be an actual ancient walled city was within walking distance.

In English, she said, “This is crazy. It must be a dream.”

She tried to stand and became very dizzy. Her vision blurred and then began to fade to black.

When Ash woke up, she found herself on a pile of straw in a small room. It smelled of smoke and animals. Light was streaming in from an opening about two-thirds up one of the mud walls.

Her head did feel clearer. When she tried to stand up, she realized that her backpack was still on her back. She unclipped it and swung it to the floor as she walked to the opening. Looking out, she saw a collection of buildings clustered around a small harbor that was full of boats of different sizes. The paths that weaved between the buildings were full of people wearing tunics and robes. It was loud. I was also very smelly.

Ash struggled to get her head around what she saw. After a few minutes, she stopped trying. Realizing that the best way to deal with this was to just go along with it, she bent to open her backpack and took out her Phoenician clothes.

“When in ancient Phoenicia, do as the ancient Phoenicians do.”

Minutes later, Ash found herself moving with the flow of people down a narrow street. The sights and sounds began to excite her. This was an excellent simulation of what Tyre must have been like. She passed stalls full of food, cloth, pottery, and bronze implements.

Stopping in front of a pottery stall full of beautiful pieces of different sizes and shapes, she said to herself in English, “I need to share this with everyone.”

Without thinking, she reached into her pocket, took out her mobile phone, and raised it to take a picture. The stall was in the shade, so the flash went off.

That was when the merchant, followed by what seemed like everyone in the street around her, turned on Ash.

They were all shouting. She heard, “Magic!” “Foreign Sorcery” “She’s a Demon!” “Witch!”

It was the term “witch!” that took over. Soon they were all shouting it while grabbing her and pulling her down the street. Several women started to grab bright pieces of cloth from stalls along the road and put them over her head. At one point, someone stole some sort of root vegetable and tied it to her nose.

Over the chaos of the growing crowd, she was able to see they were approaching a large open space raised platform in the center.. Pushing her forward, she found herself at the base of a small stage. The merchant that had started this whole thing jumped onto the platform and shouted, “we have found a witch!”

The crowd continued to shout, “A Witch!.” “Burn Her!” “A Witch!”

A well-dressed man joined the merchant on the platform and asked, “how do you know she is a witch?”

Someone in the audience answered, “She looks like one!”

Ash shook her head to try and bring some sanity to the insane scene around her. She called, “I m not a witch!”

The well-dressed man walked towards her, looked her over from sandals to scarves, and said, “ehh… but you are dressed like one.”

“They dressed me up like this!”

Someone behind her said, “Naah. No, we didn’t. No.”

Ash said, “And this isn’t’ my nose, it’s a false one.”

The man who seemed to be in charge reached down and lifted the nose off.

“Well, we did do the nose,” admitted one of the men holding her.

“Just the nose?”

“… and the scarves. But she is a witch!”

The crowd joined in. “Burn her. Burn her!”

The man motioned for Ash to be moved onto the platform and then spoke to the crowd. “I am Azmelqart. The King’s magistrate. Who here can tell me why you think she is a witch?”

Ash could now see the throng filling the square. A filthy man was working his way to the front. Once there, he said, “she turned me into a newt!”

“A newt?” asked Azmelqart.

The dirty man looked at his feet, then the crowd, and replied, “I got better,” in a small voice.

The crowd didn’t care. They started shouting “She’s a witch!” and “burn her!” again.

Azmelqart motioned for silence. “There are ways of telling whether she is a witch.”

“Are there? Well then, tell us!” demanded the merchant.

“Tell me… what do you do with witches?” asked Azmelqart.

“Burn them!”

Azmelqart nodded his head and then asked, “What do you burn apart from witches?”

Someone in the crowd answered, “More Witches!”

Azmelqart shook his head. A small boy walked forward and tentatively asked, “Wood?”

“Correct! So, why do witches burn?”

The boy looked at his feet and kicked at some stones. He then offered, “Cuz they’re made of… wood?”

Azmelqart smiled and said, “Goooood! Now, how do we tell if she is made of wood?”

Someone answered, “Build a bridge out of her.”

“Ahh, clever, but bridges can also be made out of stone. Does wood sink in water?”

“No,” said the merchant.

The boy added, “No. It floats!”

Someone in the crowd added, “Let’s throw her in the harbor!”

“What also floats in water?” asked Azmelqart.

Someone said, “bread.” Another guessed, “apples.” A third offered, “very small rocks.”

This last answer annoyed Azmelqart. People continued to make even more ridiculous suggestions until a clear, deep voice added, “A Duck!”

Bannal turned to face a man wearing bronze and leather armor on a horse. “Exactly! So logically…”

The merchant thought about it. Then he said, “if she weighs the same as a duck… she’s… MADE OF WOOD!”

“And therefore,” said Bannal.

The merchant thought some more and suggested, “a witch?”

The crowd took it up. Chanting “Witch,” “Witch,” “Witch” as they jumped up and down in the square.

With a look of triumph on his face, Azmelqart leaped from the stage and said, “We shall use my largest scale!” and the crowd followed him towards the harbor, leaving Ash alone on the platform.

“This is insane,” said Ash to the backs of the disappearing crowd. “I feel like I’m in a bad Monty Python skit.”

The only people left in the square were a young woman and an older, heavyset man. She was wearing a beautiful, ochre-colored dress that draped perfectly over her tall, thin frame. He was wearing a simple, very white tunic with a wide leather belt around his paunch.

“You certainly know how to get noticed when you come to a city for the first time,” said the woman. “I am Verihbitt, daughter of Batnoam. And this is my slave and faithful assistant in all things, Mnihh’dm.”

Ash walked towards them. “I’m Ash, daughter of…” She hesitated but could only think of her father’s real name. “Daughter of Alan.”

“Welcome to Sur, the center of the Phoenician Kingdom. You are obviously not from here or any other land I’ve been to. Where is it you come from?” asked the tall woman in a pleasant voice. Then she added, “but before you answer, let us leave the square and go to my father’s house. Before that idiot, Azmelqart, realizes he forgot to drag you to his scales.”

Mnihh’dm darted down the closest alleyway, and the two women followed.

Before long, Ash found herself in a small courtyard filled with olive and fig trees. Verihbitt motioned for her to sit on a stone bench as Mnihh’dm disappeared into a dark doorway.

“My guard,” said the young woman as she sat on another bench, “Takaa was the one that offered up the idea of a duck. I think it worked well, do you not?”

Ash caught her breath. “Yes, thank you so much. It was so strange, I did not know what to do or say. I cannot thank you enough. How can I repay you?”

Verihbitt’s face changed from stern and concerned to a beautiful smile. “Well, my father always tells me I am far too curious for my own good. And I am curious about you. Your payment must be telling me where you are from and why you are here.”

Ash contemplated what to say next. She could not tell this woman the truth. But she could stretch the truth to fit the situation.

“I was traveling in my land, a place far west from here, near where the sun goes to sleep each night.  I was… working on calculating some numbers and made a mistake that must have angered a god. Before I could fix my error, the room I was in began to shake, and all went dark. When I woke up, I was on the beach just south of the city walls.”

Verihbitt stared directly into Ash’s eyes as if trying to see if the tale was true.  She began to twist her hair in her fingers. Then she said, “that is an amazing story, one that a song should be written about. Even if it is not, I sense, the complete truth.”

The two women looked at one another, not really knowing what to say. Ash was starting to panic when Mnihh’dm returned with a platter filled with bowls. He set it down on a tripod between the two women, turned to Verihbitt, and said, “I like her. I think she needs a friend.”

Ash looked at Verihbitt more closely. She had to be about the same age as Ash. Her hair was black and curly. Her skin was the same dark olive as everyone in the city. She could tell that this was a smart, confident, and caring woman. And that was precisely what Ash needed.

Ash ventured, “I truly could use a friend.”

Verihbitt leaned forward and lifted her cup. “To friendship then, and to the adventures that it brings!”

– To Be Continued –

Continue reading with “Like and Owl,” wherein the new friends fend off not one, but two attacks, a secret is uncovered about one of them, and Ash realizes she has a connection to the present day.

Please subscribe to our newsletter, so you will know when the next installment is released

Additive & Structural Optimization Updates in Ansys 2021 R1 – Webinar

The most powerful simulation solution for metal additive manufacturing, the Ansys Additive Suite delivers the critical insights required by designers, engineers and analysts to avoid build failure and create parts that accurately conform to design specifications. This comprehensive solution spans the entire workflow — from design for additive manufacturing (DfAM) through validation, print design, process simulation and exploration of materials.

Ansys 2021 R1 delivers enhancements across all portfolio products — Ansys Additive Prep, Ansys Additive Print, Ansys Additive Science and Ansys Workbench Additive — empowering users to further advance their additive manufacturing capabilities.

Join PADT’s Simulation Support & Application Engineer Doug Oatis for a webinar covering both the structural optimization and additive updates made to Ansys 2021 R1 including enhancements for: 

  • Process Simulation

  • Part Qualification

  • Design for AM

  • Build Setup

  • Shape & Lattice Optimization

  • And much more

Register Here

If this is your first time registering for one of our Bright Talk webinars, simply click the link and fill out the attached form. We promise that the information you provide will only be shared with those promoting the event (PADT).

You will only have to do this once! For all future webinars, you can simply click the link, add the reminder to your calendar and you’re good to go!

Press Release: PADT Named a Stratasys Diamond Partner

PADT’s long-standing relationship with Stratasys, the world leader in 3D Printing systems, continues to grow. The latest facet is our recent naming as a Stratasys Diamond Partner. We started this mutual journey as one of the first 3D Printing service providers to add Stratasys’ Fused Deposition Modeling. With that start as a customer we grew to become a reseller, then a supplier for support removal equipment, We also recently expanded our sales territory to include the state of Texas.

And now we are proud to be identified as a Diamond Partner, the top level for Stratasys channel partners. Please read the press release below to learn more about the details. You can also read the official HTML and PDF versions.

We could not have achieved this honor without two groups of people – our customers and our staff. PADT has the most amazing relationship with our 3D Printing users, who let us into their business to help them realize their additive manufacturing goals. And what those customers tell us is that our staff is amazing. From salespeople who have become trusted advisors, to our expert application engineers, to our service engineers who keep their machines running.

We can’t wait to see where the Stratasys + PADT journey takes us next.


The Southwest’s Leading Provider of 3D Printing Systems, Materials and Services, PADT, Named a Stratasys Diamond Partner

PADT has Served More Than 500 Customers With More Than 800 3D Printers Throughout Arizona, Colorado, New Mexico, Texas and Utah

TEMPE, Ariz., March 9, 2021 PADT, a globally recognized provider of numerical simulation, product development, and 3D printing products and services, today announced it has been named a Stratasys Diamond partner for its continued success selling the 3D printing manufacturer’s complete line of products and providing stellar support service. PADT becomes one of the few elite Stratasys resellers in the country to have achieved Diamond partner status.

“For more than 25 years, PADT has provided the highest level of 3D printing products, services and support to our customers across the Southwest,” said Jim Sanford, vice president, Sales & Support, PADT. “Earning the Stratasys Diamond partner designation is a result of the hard work of our team, and the continued respect of our customers.”

PADT became one of the first service providers in the country to offer fused deposition modeling (FDM) printing on Stratasys equipment in the late 1990s and has continued to expand its 3D printing capabilities as a service provider and reseller. The company built its customer base by providing outstanding 3D printing services and technical support across a wide variety of industries and organizations, from schools to startups, including some of the world’s largest aerospace organizations. To date, PADT has sold 883 printers to 506 customers across the Southwest.

PADT currently offers Stratasys’ complete portfolio of top-rated systems, accessories and materials, including full-color printing with PolyJet multi-material systems, robust and proven FDM manufacturing systems from desktop to those supporting advanced materials, and stereolithography for precision and finish.

“3D printing is a fast-growing industry that continues to expand its capabilities and quality year-over-year,” said Ward Rand, co-founder and principal, PADT. “We’re thankful for the strong partnership we’ve enjoyed with Stratasys, and with new technologies coming, we look forward to offering our customers even more choices to make 3D printing part of their everyday process to drive efficiency and cost-savings. This is especially true as we help our customers move from prototyping to creating tooling and production parts with Stratasys additive manufacturing solutions. 3D printing solutions from Stratasys are helping the world’s leading companies gain business agility and competitive advantage and PADT is proud to be a Diamond Partner.”

PADT now represents Stratasys in Arizona, Colorado, New Mexico, Texas, and Utah as an Elite Channel Partner at the Diamond level. To learn more about PADT and its 3D printing products and services, please visit www.padtinc.com.

About PADT

PADT is an engineering product and services company that focuses on helping customers who develop physical products by providing Numerical Simulation, Product Development, and 3D Printing solutions. PADT’s worldwide reputation for technical excellence and experienced staff is based on its proven record of building long-term win-win partnerships with vendors and customers. Since its establishment in 1994, companies have relied on PADT because “We Make Innovation Work.” With over 90 employees, PADT services customers from its headquarters at the Arizona State University Research Park in Tempe, Arizona, and from offices in Torrance, California, Littleton, Colorado, Albuquerque, New Mexico, Austin, Texas, and Murray, Utah, as well as through staff members located around the country. More information on PADT can be found at www.PADTINC.com.

# # #

All Things Ansys 083: Digital Mission Engineering & the Acquisition of AGI

 

Published on: March 8th, 2021
With: Eric Miller, Anthony Dawson & Paul Graziani
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Anthony Dawson, Vice President & General Manager at Ansys, and Paul Graziani, CEO and Co-Founder of Analytical Graphics, Inc. (AGI) to discuss the acquisition of AGI and what it means for those simulating in the aerospace and defense industry.

Digital mission engineering, pioneered by AGI, combines digital modeling, simulation, testing, and analysis for aerospace, defense, telecommunication, and intelligence applications to evaluate mission outcomes at every phase of a system’s life cycle. Using this tool you can evaluate the full effect of every change you make and find problems before they become crises.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

Listen:
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The State of Mechanical Meshing in Ansys 2021 R1 – Webinar

Meshing is an integral part of the engineering simulation process where complex geometries are divided into simple elements that can be used as discrete local approximations of the larger domain. The mesh influences the accuracy, convergence and speed of the simulation. Furthermore, since meshing typically consumes a significant portion of the time it takes to get simulation results, the better and more automated the meshing tools, the faster and more accurate the solution.

Ansys provides general purpose, high-performance, automated, intelligent meshing software which produces the most appropriate mesh for accurate, efficient multiphysics solutions — from easy, automatic meshing to highly crafted mesh. 

Join PADT’s Senior Mechanical Engineer and meshing expert Joe Woodward for an introduction to the new meshing capabilities available in Ansys 2021 R1, including updates for: 

• Repairing Topology

• Weld Control

• Separating Morphing Adaptive Remeshing Technology (SMART)

• Batch Connections

• And much more

Register Here

If this is your first time registering for one of our Bright Talk webinars, simply click the link and fill out the attached form. We promise that the information you provide will only be shared with those promoting the event (PADT).

You will only have to do this once! For all future webinars, you can simply click the link, add the reminder to your calendar and you’re good to go!

Travel Trailer Analysis in ANSYS Discovery

ANSYS Discovery is a wonderful tool for fast and first look structural, fluid flow, and thermal simulations. Discovery gives us the ability to modify geometry very quickly within the interface and to add or remove features to view realtime simulation reactions. This allows us to quickly iterate, explore design changes, and better understand interaction between our design and the environment. Today we are going to be investigating the pressure profile on the exterior of a travel trailer being pulled behind a truck down the highway.

Truck and Trailer with velocity streamlines

In this analysis we are using a 2018 Chevy Silverado 2500 model pulled from GrabCAD with a generic 25 foot travel trailer. Based on described experience we’ve noticed that the roof and sidewalls of a moderately sized travel trailer seem to bow outwards at highway speeds near the front of the trailer.

The first thing to do is to put this model in an enclosure and prescribe a flow condition at the inlet and a pressure boundary at the outlet. Modeling the truck/trailer combo at a speed of ~55 mph (25 m/s) confirms that there is suction (negative pressure) present in these key areas:

Negative Pressure: Truck and Trailer in 25 m/s airflow, -500 Pa isosurface

While the actual roof and sidewall separating could be attributed to poor manufacturing processes we wonder if there could be a design change to minimize negative pressure/suction. One idea would be to incorporate some sort of turbulator to break up the laminar flow. I’ve seen turbulator tape in a zig-zag pattern used in aviation for this specific purpose so we’ll try recreating the travel trailer equivalent and see how it goes.

I started with a zig-zag pattern about 4″ tall on top of the trailer to see if I could “pop the bubble”

This did have the intended consequence and it was curious to see how much impact the turbulator on top of the trailer had on the negative pressure at the sidewall of the trailer:

The next thing I wanted to try was moving the turbulator forward or backward to see the effects. Moving the turbulator towards the aft of the vehicle has limited effects but moving it to different locations within the suction “bubble” seems to effect our -500 Pascal isosurface:

This would seem to indicate the presence of a “sweet spot” for turbulator location that merits further research in either the “Analyze” mode within Ansys Discovery or within Ansys Fluent.

Before I hang up my coat I’d like to investigate one alternate design that I’ve seen more often in automotive applications. I’m going to try adding vertical pillars and see how that goes:

We can easily change the height and position of the pillars to see the resultant effects on the pressure isosurface. The pillars also have a significant effect on the suction bubble but I notice that it has less effect on the suction on the sides of the trailer.

Using Discovery we can quickly and easily iterate on designs, get a first-view of the physics, and determine which change or design merits further investigation. In this analysis we can see that there is most definitely a suction profile at the front of a generic travel trailer. If the suction proves damaging we can see that there are several design changes which will help to mitigate this effect.

For more information on ANSYS Discovery please reach out to info@padtinc.com.

If you would like to play with the models themselves, you can download a zip file with all three models here.

All Things Ansys 082: High Frequency Updates on Ansys 2021 R1

 

Published on: February 26th, 2021
With: Eric Miller & Aleksandr Gafarov
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Electronics Application Engineer Aleksandr Gafarov for a look at what’s new in this electromagnetics release.

When it comes to high frequency electromagnetics, Ansys 2021 R1 delivers a plethora of groundbreaking enhancements. Ansys HFSS Mesh Fusion enables simulation of large, never before possible electromagnetic systems with efficiency and scalability.

If you have any questions, comments, or would like to suggest a topic for the next episode, shoot us an email at podcast@padtinc.com we would love to hear from you!

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@ANSYS #ANSYS

Alternating Stresses in Ansys Mechanical – Part 2: von Mises Stress

Editor’s Note:
The following PowerPoint is from one of PADT’s inhouse experts on linear dynamics, Alex Grishin.

One of the most valuable results that can come from a harmonic response analysis is the predicted alternating stresses in the part. This feeds fatigue and other downstream calculations as well as predicting maximum possible values. Because of the math involved, calculating derived stresses, like Principal Stresses and von Mises Stress can be done in several ways. This post shows how Ansys Mechanical does it and offers an alternative that is considered more accurate for some cases for von Mises. Part 1 covers how to do the same for Principal Stresses.

Alternating_vonMises_Stress

Alex also made this zip file that contains updated macros, an example Mechanical database, and a spreadsheet:

General Interface & Performance Updates in Ansys 2021 R1 – Webinar

Ansys 2021 R1 delivers significant improvements in simulation technology together with nearly unlimited computing power to help engineers across all industries reimagine product design and achieve product development goals that were previously thought to be impossible.

Ansys Mechanical delivers features to enable faster simulations, easier workflows, journaling, scripting and product integrations that offer more solver capabilities. Within this new release, interface and performance capabilities have been enhanced to offer greater ease of use and overall efficiency in nearly every circumstance. 

Join PADT’s Simulation Support Manager and Ansys expert Ted Harris, for an overview of what updates in this release best energize this tool, such as enhancements made to:

• Solution History

• Fluid Network Creation

• Circuits

• GPU & Solvers

• And much more

Register Here

If this is your first time registering for one of our Bright Talk webinars, simply click the link and fill out the attached form. We promise that the information you provide will only be shared with those promoting the event (PADT).

You will only have to do this once! For all future webinars, you can simply click the link, add the reminder to your calendar and you’re good to go!