All Things Ansys 097: Fluids Updates in Ansys 2021 R2

 

Published on: September 20th, 2021
With: Eric Miller & Sina Ghods
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Senior Application Engineer and fluids expert Sina Ghods for a look at what’s new for fluid simulation in Ansys 2021 R2.

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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Fluids Updates in Ansys 2021 R2 – Webinar

Ansys computational fluid dynamics (CFD) products are for engineers who need to make better, faster decisions. CFD simulation products have been validated and are highly regarded for their superior computing power and accurate results. Reduce your development time and efforts while improving performance and safety.

With Ansys 2021 R2 comes a variety of features for improved workflows and more advanced simulations. Experience up to 5X speed ups for high-speed flows to Mach 30 and above, with improved treatment of reaction sources in the density-based solver. Discover embedded best practices in the automated mesh adaption setup for combustion and multiphase applications, resulting in cell count reductions of up to 70%.

Join PADT’s Senior Application Engineer and fluids expert Sina Ghods for an overview of what’s new in this latest release, including enhancements made to: 

Fluent

Forte

EnSight

CFX & Turbo Tools

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!

What’s new in Flownex 2021 Update 1

Friday Flownex Tip #16:

The Flownex team has just released Flownex SE 8.12.8, also known as 2021- Update 1. This release added new components, additional flexibility, additional improvements to user-friendliness, and bug fixes. There is a lot to unpack, and the best way to know all the details is to dig into the Release Notes. If you don’t have time for that, below are the nine enhancements that PADT’s engineers feel are the most noteworthy.

Velocity Based PID controller in the Distributed Control System

The new velocity based PID controller calculates the change in output variables, rather than an output itself. This enables multiple controllers to control the same variable without causing spikes in the output.

Steady state operations are now part of DCS components

DCS components can propagate their inputs into the model before, during, or after a steady state solution has been computed. This allows the user to decide if the DCS component initializes the steady state solution, calculate values for each timestep during the solution, or after the steady state solution has been completed. Be default, before is used.

Component Selection now has a search feature

The same controls that are in Flownex’s “Find” dialog are now in the Component Selection dialog. Multiple filters and options are available to make it easy to select components in models.

Added humid air fluid functions to Material Scripts

Psychrometric fluid functions have been added to the Material Scripts to enable the calculation of mixture mass fractions for three input combinations:

  • Humidity Ratio
  • Pressure, dry bulb temperature, and relative humidity
  • Pressure, dry bulb temperature, and wet bulb temperature

A new option to select between Conduction Shape Factors and Effective Area for the composite conductivity element

This one is pretty straightforward. A drop down in the Composite Conductivity dialog, under “Geometry”, lets the user specify which method they want for calculation conduction.

The installation verification tool now support several instances of Flownex in parallel

Users can now make sure that their installation is running parallel instances correctly with this new option. By default, it will run half the number of available logical processors, or the user can change the number in the tools user interface.

The Reactor Builder script has been greatly enhanced

User input has been combined to make multiple changes to the script that builds reactors. The enhancements are very specific to nuclear reactors and not only allow for more accurate models, but also a smoother process. If you use this feature, make sure you check the release notes.

Changes have been made to the runtime neutronics script

Another area that should excite (is that a pun?) those who model nuclear reactors are the user-driven changes to the script that models neutron behavior in reactors. These are fairly significant and a must-read for anyone who uses this feature.

Ability to select all components in a flow circuit on the drawing canvas

Users can now right-mouse-button on a component in their model and select all the components that are in the same flow circuit. Not only are they selected, but any common properties are shown in the properties grid.

And, much more

There were also a few bug fixes, especially in the flow solver components, so if you were dealing with an issue check the release notes or contact PADT to see if your problem has been resolved.

These were the changes that we think most users would be interested in knowing about. Check out the release notes to see all of them and, as always, don’t hesitate to reach out if you have any questions or don’t see something you need.

All Things Ansys 093: Introducing Ansys 2021 R2

 

Published on: July 26th, 2021
With: Eric Miller, Tom Chadwick, Aleksandr Gafarov, Joe Woodward, Ted Harris, Sina Ghods, & Josh Stout
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by members of the simulation support team to explore Ansys 2021 R2 and discuss their favorite features so far.

Ansys multiphysics software solutions and digital mission engineering help companies innovate and validate like never before. Ansys gives engineers the power to see how their ideas will perform against millions of variables.

Ansys 2021 R2 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.

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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Heat Transfer & Flow Updates in Ansys Fluent 2021 R1 – Webinar

Ansys Fluent is the industry-leading fluid simulation software known for its advanced physics modeling capabilities and unmatched accuracy.

This tool gives you more time to innovate and optimize product performance, allowing users to trust their simulation results with a software that has been extensively validated across a wide range of applications. Two key applications that have seen improvements in the 2021 R1 update are fluid flow and heat transfer.

Performing steady or transient conjugate heat transfer simulations determines heat exchanger performance and the impact of thermal stresses. Models developed in Ansys Fluent can include fluid structure interaction, fatigue life prediction and multiphase boiling, condensation and evaporation.

Additionally, new proprietary high-speed numerics in available in this release enable the reliable solution of high Mach number flows without reducing accuracy.

Join PADT’s Fluent expert Tom Chadwick for a presentation on the latest in fluid flow and heat transfer updates in Ansys 2021 R1.

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!

Fluent Updates in Ansys 2020 R2 – Webinar

The industry-leading fluid simulation software Ansys Fluent is capable of predicting fluid flow, heat & mass transfer, chemical reactions and other related phenomena.

Known for delivering the most accurate solutions in the industry without compromise, Ansys continues to provide cutting-edge advancements with each new release. In 2020 R2 users can learn about updates from pre-processing to new physics models and workflow improvements.

Join PADT’s Senior Simulation Support & Application Engineer Sina Ghods for an in depth discussion on what is new and improved in this version of Ansys Fluent, covering topics such as:

– Meshing Workflows

– Battery Modeling

– Multi-phase & DPM Flow

– Solver Enhancements

– 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 055: Introducing ANSYS 2020

 

Published on: February 3rd, 2020
With: Eric Miller, Josh Stout, Sina Gohds, Ted Harris & Tom Chadwick
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Josh Stout, Sina Gohds, Ted Harris, and Tom Chadwick from the simulation support team to discuss their thoughts on ANSYS 2020 R1, and what specific capabilities they are excited about exploring after attending the annual ANSYS sales kickoff in Florida.

This new release covers updates for the entirety of the ANSYS suite of tools, so there is a lot to talk about.

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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Fluent Updates in ANSYS 2020 R1 – Webinar

Computational fluid dynamics (CFD) can be challenging for a multitude of reasons, but not with ANSYS Fluent. Anyone can get great CFD simulation results with ANSYS solutions. Fluent software contains the broad, physical modeling capabilities needed to model flow, turbulence, heat transfer and reactions for industrial applications. These range from air flow over an aircraft wing to combustion in a furnace, from bubble columns to oil platforms, from blood flow to semiconductor manufacturing and from clean room design to wastewater treatment plants.

Fluent spans an expansive range, including special models, with capabilities to model in-cylinder combustion, aero-acoustics, turbomachinery and multiphase systems. The latest innovations and updates simplify and speed setup and meshing while adding even more accurate physical models. The outcome: great results, without compromise.

Join PADT’s Senior CFD & FEA Application Engineer, Sina Ghods, for a look at what’s new and improved in this latest version of ANSYS Fluent, including:

  • User Interface/Graphics
  • Meshing Workflows
  • Multi-phase Robustness
  • Solver Enhancements
  • 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!

Reduce EMI with Good Signal Integrity Habits

Recently the ‘Signal Integrity Journal’ posted their ‘Top 10 Articles’ of 2019. All of the articles included were incredible, however, one stood out to me from the rest – ‘Seven Habits of Successful 2-Layer Board Designers’ by Dr. Eric Bogatin (https://www.signalintegrityjournal.com/blogs/12-fundamentals/post/1207-seven-habits-of-successful-2-layer-board-designers). In this work, Dr. Bogatin and his students were developing a 2-Layer printed circuit board (PCB), while trying to minimize signal and power Integrity issues as much as possible. As a result, they developed a board and described seven ‘golden habits’ for this board development. These are fantastic habits that I’m confident we can all agree with. In particular, there was one habit at which I wanted to take a deeper look:

“…Habit 4: When you need to route a cross-under on the bottom layer, make it short. When you can’t make it short, add a return strap over it..”

Generally speaking, this habit suggests to be very careful with the routing of signal traces over the gap on the ground plane. From the signal integrity point of view, Dr. Bogatin explained it perfectly – “..The signal traces routed above this gap will see a gap in the return path and generate cross talk to other signals also crossing the gap..”. On one hand, crosstalk won’t be a problem if there are no other nets around, so the layout might work just fine in that case. However, crosstalk is not the only risk. Fundamentally, crosstalk is an EMI problem. So, I wanted to explore what happens when this habit is ignored and there are no nearby nets to worry about.

To investigate, I created a simple 2-Layer board with the signal trace, connected to 5V voltage source, going over an air gap. Then I observed the near field and far field results using ANSYS SIwave solution. Here is what I found.

Near and Far Field Analysis

Typically, near and far fields are characterized by solved E and H fields around the model. This feature in ANSYS SIwave gives the engineer the ability to simulate both E and H fields for near field analysis, and E field for Far Field analysis.

First and foremost, we can see, as expected, that both near and far Field have resonances at the same frequencies. Additionally, we can observe from Figure 1 that both E and H fields for near field have the largest radiation spikes at 786.3 MHz and 2.349GHz resonant frequencies.

Figure 1. Plotted E and H fields for both Near and Far Field solutions

If we plot E and H fields for Near Field, we can see at which physical locations we have the maximum radiation.

Figure 2. Plotted E and H fields for Near field simulations

As expected, we see the maximum radiation occurring over the air gap, where there is no return path for the current. Since we know that current is directly related to electromagnetic fields, we can also compute AC current to better understand the flow of the current over the air gap.

Compute AC Currents (PSI)

This feature has a very simple setup interface. The user only needs to make sure that the excitation sources are read correctly and that the frequency range is properly indicated. A few minutes after setting up the simulation, we get frequency dependent results for current. We can review the current flow at any simulated frequency point or view the current flow dynamically by animating the plot.

Figure 3. Computed AC currents

As seen in Figure 3, we observe the current being transferred from the energy source, along the transmission line to the open end of the trace. On the ground layer, we see the return current directed back to the source. However at the location of the air gap there is no metal for the return current to flow, therefore, we can see the unwanted concentration of energy along the plane edges. This energy may cause electromagnetic radiation and potential problems with emission.

If we have a very complicated multi-layer board design, it won’t be easy to simulate current flow on near and far fields for the whole board. It is possible, but the engineer will have to have either extra computing time or extra computing power. To address this issue, SIwave has a feature called EMI Scanner, which helps identify problematic areas on the board without running full simulations.

EMI Scanner

ANSYS EMI Scanner, which is based on geometric rule checks, identifies design issues that might result in electromagnetic interference problems during operation. So, I ran the EMI Scanner to quickly identify areas on the board which may create unwanted EMI effects. It is recommended for engineers, after finding all potentially problematic areas on the board using EMI Scanner, to run more detailed analyses on those areas using other SIwave features or HFSS.

Currently the EMI Scanner contains 17 rules, which are categorized as ‘Signal Reference’, ‘Wiring/Crosstalk’, ‘Decoupling’ and ‘Placement’. For this project, I focused on the ‘Signal Reference’ rules group, to find violations for ‘Net Crossing Split’ and ‘Net Near Edge of Reference’. I will discuss other EMI Scanner rules in more detail in a future blog (so be sure to check back for updates).

Figure 4. Selected rules in EMI Scanner (left) and predicted violations in the project (right)

As expected, the EMI Scanner properly identified 3 violations as highlighted in Figure 4. You can either review or export the report, or we can analyze violations with iQ-Harmony. With this feature, besides generating a user-friendly report with graphical explanations, we are also able to run ‘What-if’ scenarios to see possible results of the geometrical optimization.

Figure 5. Generated report in iQ-Harmony with ‘What-If’ scenario

Based on these results of quick EMI Scanner, the engineer would need to either redesign the board right away or to run more analysis using a more accurate approach.

Conclusion

In this blog, we were able to successfully run simulations using ANSYS SIwave solution to understand the effect of not following Dr.Bogatin’s advice on routing the signal trace over the gap on a 2-Layer board. We also were able to use 4 different features in SIwave, each of which delivered the correct, expected results.

Overall, it is not easy to think about all possible SI/PI/EMI issues while developing a complex board. In these modern times, engineers don’t need to manufacture a physical board to evaluate EMI problems. A lot of developmental steps can now be performed during simulations, and ANSYS SIwave tool in conjunction with HFSS Solver can help to deliver the right design on the first try.

If you would like more information or have any questions please reach out to us at info@padtinc.com.

All Thing ANSYS 054: Talking CFD – Discussion on the Current State of Computational Fluid Dynamics with Robin Knowles

 

Published on: January 13th, 2020
With: Eric Miller & Robin Knowles
Description:  

In this episode we are excited to share an interview done with host and Co-Founder of PADT, Eric Miller and host of the Talking CFD podcast Robin Knowles, regarding the history of PADT’s use of simulation technology as a whole, and the current state of all things CFD.

If you would like to hear more of Robin’s interviews with various other CFD based companies both small and large, you can listen at https://www.cfdengine.com/podcast/.

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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All Things ANSYS 049: Predicting & Controlling Environmental Pollution with ANSYS Simulation

 

Published on: October 21st, 2019
With: Eric Miller & Clinton Smith
Description:  

In this episode, your host and Co-Founder of PADT, Eric Miller is joined by PADT’s CFD Team Lead Engineer Clinton Smith for a discussion on how ANSYS fluids tools are being used to help predict and control environmental pollution. This information is helping engineers in a variety of ways, such as understanding the formation and dispersion of pollutants such as NOx, SOx, CO and soot.

If you would like to learn more about what this application is capable of, check out our webinar on the topic here: https://www.brighttalk.com/webcast/15747/374571

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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All Things ANSYS 046: The Founding of CFX

 

Published on: September 9th, 2019
With: Eric Miller, Paul Galpin, & Brad Hutchinson
Description:  

In this episode, your host and Co-Founder of PADT, Eric Miller is joined by Paul Galpin and Brad Hutchinson, two founders of the Computational Fluid Dynamics (CFD) simulation tool now owned by ANSYS, called CFX. They discuss how they initially got into the world of simulation, the current state of CFD, and what is important to be aware of as it continues to grow and develop.

If you would like to learn more about what’s new in the latest version of CFX, check out PADT’s webinar on fluids updates in ANSYS 2019 R3 here: https://www.brighttalk.com/webcast/15747/369903

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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Fluids Updates in ANSYS 2019 R2 – Webinar

ANSYS CFD goes beyond qualitative results to deliver accurate quantitative predictions of fluid interactions and trade-offs. These insights reveal unexpected opportunities for your product — opportunities that even experienced engineering analysts can miss.

Products such as ANSYS Fluent, Polyflow, and CFX work together in a constantly improving tool kit that is developed to provide ease of use improvements for engineers simulating fluid flows and it’s impacts on physical models.

Join PADT’s Simulation Support and Application Engineer, Sina Ghods, for a look at what is new and improved for fluids-related tools in ANSYS 2019 R2. This presentation includes updates regarding:

A new fluent experience

Parallel Mosaic-enabled meshing

Discrete Phase Modeling

Creating high-quality meshes for complex models

Transient elasticity for fluid structure interaction

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 034 – Celebrating 25 Years of ANSYS Simulation: Changes In The Last Quarter Century & Where The Future Will Take Us

 

Published on: April 8th, 2019
With: Eric Miller, Ted Harris, Tom Chadwick, Sina Ghods, & Alex Grishin
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Ted Harris, Tom Chadwick, Sina Ghods, and Alex Grishin, for a round-table discussion on their experience and history with simulation, including what has changed since they started using it and what they’re most impressed and excited by, followed by some prediction and discussion on what the future may hold for the world of numerical simulation.

Thank you again for those of you who have made the past 25 years something to remember, and to those of you who have come to know PADT more recently, we look forward to what the next 25 will bring.

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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All Things ANSYS 030 – Updates Available in ANSYS Fluent 2019 R1

 

Published on: February 13th, 2019
With: Eric Miller, Tom Chadwick, & Sina Ghods
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Sina Ghods, and Tom Chadwick from the Simulation Support Team for a discussion on their favorite updates available in the latest release of ANSYS Fluent so far, followed by an update on news and upcoming events pertaining to PADT and ANSYS Simulation.

Want to learn more about what to expect in ANSYS Fluent 2019 R1? Check out PADT’s webinar covering everything you need to know about the tool’s latest update.

Watch here: https://bit.ly/2SJBFC4

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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