All Things Ansys 069: Fluent Updates in Ansys 2020 R2

 

Published on: August 10th, 2020
With: Eric Miller & Sina Ghods
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Senior Application Engineer, Sina Ghods for a discussion on what’s new and their favorite features in the 2020 R2 update for Ansys Fluent.

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.

If you would like to learn more about this update, you can view Sina’s webinar on the topic here: https://www.brighttalk.com/webcast/15747/427082

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:
Subscribe:

@ANSYS #ANSYS

Optimizing Electronics Reliability with Ansys Sherlock – Webinar

Ansys Sherlock automated design analysis software is the only Reliability Physics/Physics of Failure (PoF)-based electronics design analysis software that provides fast and accurate life predictions for electronic hardware at the component, board and system levels in early design stages. A unique, powerful capability of Sherlock is its revolutionary ability to rapidly convert electronic CAD (ECAD) files into CFD and FEA models with accurate geometries and material properties.

Through its powerful parsing engine and embedded libraries containing over 500,000 parts, Sherlock reduces pre-processing time from days to minutes and automates workflows through its integration with Ansys Icepak, Ansys Mechanical and Ansys Workbench.

With its extensive parts/materials libraries, Sherlock automatically identifies your files and imports your parts list, then builds an FEA model of your circuit board in minutes. It also produces a holistic analysis that is critical to developing reliable electronics products. It enables designers to simulate each environment, failure mechanism and assembly that a product might encounter over its lifespan.

Join PADT’s Systems Application & Support Engineer Josh Stout for an introduction to this powerful tool along with a look at what new features and updates have been added in the Ansys 2020 R2 version.

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 068: Mechanical Updates in Ansys 2020 R2

 

Published on: July 27th, 2020
With: Eric Miller & Joe Woodward
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Joe Woodward, Senior Mechanical Engineer & Lead Trainer at PADT for a discussion on what is new in the 2020 R2 release of Ansys Mechanical, along with a look at their favorite features.

If you would like to learn more about this topic, you can view PADT’s webinar covering the release here: https://www.brighttalk.com/webcast/15747/422824

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:
Subscribe:

@ANSYS #ANSYS

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 067: Introducing an All-new Ansys Discovery

 

Published on: July 13th, 2020
With: Eric Miller & Justin Hendrickson
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Justin Hendrickson, the Director of Product Management for the Physics Business Unit at Ansys for a discussion on the new Discovery release and the live product release event taking place on Wednesday, July 29th at 11:00 am EDT.

Learn how Discovery will help you boost your ROI across your organization by decreasing costs associated with engineering labor, physical prototyping, and testing. With this tool you can answer critical design questions earlier on in your process without waiting for simulation results. Quickly prepare models, explore multiple design concepts, and refine insights with high-fidelity, all thanks to this brand new release from Ansys.

If you would like to register for the release event you can do so via this link: https://www.padtinc.com/discoveryr2

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:
Subscribe:

@ANSYS #ANSYS

Mechanical Updates in Ansys 2020 R2 – Webinar

From designers and occasional users looking for quick, easy and accurate results, to experts looking to model complex materials, large assemblies and nonlinear behavior, Ansys has you covered. The intuitive interface of Ansys Mechanical enables engineers of all levels to get answers fast and with confidence. Ansys structural analysis software is used across industries to help engineers optimize their product designs and reduce the costs of physical testing.

Ansys Mechanical is the flagship mechanical engineering software solution that uses finite element analysis (FEA) for structural analysis.It covers an enormous range of applications and comes complete with everything you need from geometry preparation to optimization and all the steps in between. With Mechanical Enterprise you can model advanced materials, complex environmental loadings and industry-specific requirements in areas such as offshore hydrodynamics and layered composite materials.

In this webinar, PADT’s Senior Mechanical Engineer & Lead Trainer, Joe Woodward will cover a few key components of this tool and what is newly available for them in Ansys 2020 R2. This includes updates for:

– Mechanical Core

– Mechanical Graphics/Post Processing

– Linear Dynamics

– SMART Fracture

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 066: Simulation Automation & Optimization management with Ansys optiSLang

 

Published on: June 29th, 2020
With: Eric Miller & Josh Stout
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s systems application & support engineer Josh Stout to look at the optimization tool optiSLang. This tool helps automate simulation and optimization activities across various solution areas, such as autonomy, electrification, digital twins, and more, as well as how it enables users to capitalize on the benefits of enterprise simulation management.

If you would like to learn more, you can view the product brochure here: https://www.ansys.com/-/media/ansys/corporate/resourcelibrary/brochure/optislang-brochure.pdf.

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:
Subscribe:

@ANSYS #ANSYS

Combining Simulation with Additive Manufacturing to Optimize Product Design – Webinar

Advatech Pacific, a Phoenix-based aerospace and defense contractor founded in 1995, works to change the way engineering is conducted for the better by incorporating innovative technologies into its customer’s workflow. Based on the success of previous projects, Advatech is a strong proponent of using high-end simulation software such as Ansys to identify and evaluate the fine details of massive multi-body mechanical systems, whether through simple static analyses or tightly-coupled multiphysics computations.

Implementing additive manufacturing as an additional way to improve system design presented opportunities to cut back on tooling costs and reduce lead time for several candidate turbine-engine parts. Doing so would also alleviate the challenge of reproducing complex castings, a problem made increasingly difficult by the fact that many of the original casting providers are no longer in business.

Join PADT’s Lead Mechanical Engineer Doug Oatis, and Advatech Pacific’s Engineering Manager Matt Humrick for a discussion on Ansys tools with regards to additive manufacturing & topology optimization, and how Advatech Pacific was able to use them to drastically improve the efficiency of their design and manufacturing process.

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 064: The Largest Virtual Engineering Simulation Trade Show Ever – Ansys Simulation World

 

Published on: June 1st, 2020
With: Eric Miller & Lynn Ledwith
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by Ansys CMO Lynn Ledwith, for a look at their digital trade show, Simulation world taking place Wednesday June 10th through Thursday June 11th.

The largest engineering simulation virtual event in the world, this event is a free online conference designed to inspire and educate executives, engineers, R&D, and manufacturing professionals about the transformative powers of engineering simulation and Ansys.

If you would like to learn more, visit simulation-world.com or register for free via https://bit.ly/2XjxrCN

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:
Subscribe:

@ANSYS #ANSYS

5 questions we ask before preparing a CFD consulting quote

This post was created based on the expert advice of PADT CFD engineer and Project Lead, Nathan Huber.

Simulating the behavior of liquids and gases has become a standard part of product development in products where fluid behavior plays an important role.  Here at PADT, we have been using Computational Fluid Dynamics, or CFD, for years to model everything from combustion in turbine engines to cooling of electronics, to golf balls. With that experience, our estimates for a given project have become reasonably accurate.

However, we can only estimate accurately if we have complete and accurate information on what you need simulated and what you hope to gain from the simulation. To help everyone arrive at more accurate cost and schedule estimates, even if you are planning a project internally, we offer the following list of five questions we always ask:

1: Have we signed a Non-Disclosure Agreement (NDA)?

Before we can do anything, we need to have an agreement in place that clearly defines how both sides handle proprietary information.  When we have tried holding meetings to gather information for a quote before an NDA is in place, we almost always waste time. There is just too much that is proprietary in most products.

2. What does your CAD Geometry look like?

We also need to know the physical geometry of your system.  That is why we ask for an accurate and complete CAD model.  We take some time to poke through the files in our software to make sure we can use the geometry, it is accurate, and it has the level of detail required for CFD. Basically, we check to see if we can pull a fluid domain from your CAD models. Remember, we are not simulating the solid part of your product; we are modeling the inverse and therefore need to pull a negative volume from your geometry.

3. What are the Boundary Conditions and Material Properties?

Now that the geometric domain is understood, we need to know what is inside that domain, and what is acting upon it.  We will ask you for boundary conditions, and for the material properties of the fluid or fluids you are asking us to model.  The complexity, time variation, and severity of the loads drive the difficulty of setting up and running the simulation. And the material properties can also impact the sophistication of the model as well as its robustness.  Both, therefore, have a significant impact on cost.

4. What results do you want to see?

When a simulation finishes, it can be post-processed to get a vast array of plots, figures, animations, pretty pictures, etc.  Those take time to create, so we need to know what you want to see. Also, we set up some post-processing parameters before we start the simulation.

5. What do you want to learn from your CFD Simulation?

The whole point of doing a CFD simulation is to study the behavior of your system. We need to know what behavior you need to understand so we can make sure that the simulation we propose answers your questions and guides you in your design process. 


We hope you find this review useful when you are planning your internal CFD project as well as those you outsource. And speaking of outsourcing, please consider PADT as your resources for any future simulation projects of any type, not just CFD.  Now, you already know what questions we will ask.

Fighting COVID-19 with Ansys Simulation – Webinar

Simulation has been and continues to be a powerful tool for helping to drive innovation in the medical industry. Everything from medical devices, to hospital equipment, and even pharmaceutical and clinical practices can benefit from the introduction of simulation technology. This is true now more than ever, as the we all are facing such turbulent times.

During the COVID-19 pandemic, Ansys is striving to combat the spread of the coronavirus, by backing the ongoing initiatives of customers and partners working in the medical sphere. In order to support healthcare professionals, policy makers, and communities around the world in this endeavor, Ansys is sharing key insights gained from their own analyse, along with those of partners and other collaborators, regarding how to prevent future spread, and treat those already effected by the virus.

Join PADT’s Co-founder and Principal engineer Eric Miller, along with Marc Horner, Principal Healthcare Engineer at Ansys, for a discussion on what the company is doing to combat the virus, as well as a look at some models that effectively illustrate how the tools are being used.

Register Here

Advanced Capabilities to Consider when Simulating Blow Molding in Ansys Polyflow or Discovery AIM

Ansys Polyflow is a Finite Element CFD solver with unique capabilities that enable simulation of complex non-Newtonian flows seen in the polymer processing industry. In recent releases, Polyflow has included templates to streamline two of its most common use cases: blow molding and extrusion. Similarly, Ansys Discovery AIM offers a modern user interface that guides users through blow molding and extrusion workflows while still using the proven Polyflow solver under the hood. It is not uncommon for engineers to be unsure about which tool to pursue for their specific application. In this article, I will focus on the blow molding workflow. More specifically, I will point out three features in Polyflow that have not yet been incorporated into Discovery AIM:

  1. The PolyMat curve fitting tool to derive viscoelasticity model input parameters from test data
  2. Automatic parison thickness mapping onto an Ansys Mechanical shell mesh
  3. Parison Programming to optimize parison thickness subject to final part thickness constraints

Keep in mind that either tool will get the job done in most applications, so let us first quickly review some of the core features of blow molding simulations that are common to Polyflow and AIM:

  • Parison/Mold contact detection
  • 3-D Shell Lagrangian automatic remeshing
  • Generalized Newtonian viscosity models
  • Temperature dependent and multi-mode integral viscoelastic models
  • Time dependent mold pressure boundary conditions
  •  Isothermal or non-isothermal conditions

For demonstration purposes, I modeled a sweet submarine toy in SpaceClaim. Unfortunately, I think it will float, but let’s move past that for now.  

Figure 1: Final Submarine shape (Left), Top View of Mold+ Parison (Top Left), Side View of Mold+Parison (Bottom Right)

At this point, you could proceed with Discovery AIM or with Polyflow without any re-work. I’lll proceed with the Polyflow Blow Molding workflow to point out the features currently only available in Polyflow.

PolyMat Curve Fitting Tool

With the blow molding template, you can select whether to treat the parison as isothermal or non-isothermal and whether to model it as general Newtonian or viscoelastic. Suppose we would like to model viscoelasticity with the KBKZ integral viscoelastic model because we were interested in capturing strain hardening as the parison is stretched. The inputs to the KBKZ model are viscosity and relaxation times for each mode. If they are known, the user can input the values directly. This is possible in Discovery AIM as well. However, the PolyMat tool is unique to Polyflow. PolyMat is a built-in curve fitting tool that helps generate input parameters for the various viscosity model available in Polyflow using material data. This is particularly useful when you do not explicitly have the inputs for a viscoelastic model, but perhaps you have other test data such as oscillatory and capillary rheometry data. In this case I have with the loss modulus, storage modulus and shear viscosity for a generic high density polyethylene (HDPE) material. For this material, four modes are enough to anchor the KBKZ model to the data as shown below. We can then load the viscosity/relaxation time into Polyflow and continue. 

Figure 2: Curve Fitting of G’(Ω),G’’(Ω),η() [Left], KBKZ Viscoelastic Model inputs (Right)

The main output of the simulation is the final parison thickness distribution. For this sweet submarine, the initial parison thickness is set to 3mm and the final thickness distribution is shown in the contour plot below.

Figure 3a: Animation of blow molding process

Figure 3b: Final Part Thickness Distribution

Thickness Mapping to Ansys Mechanical

The second Polyflow capability I’d like to point out is the ability to easily map the thickness distribution onto an Ansys mechanical shell mesh. You can map the thickness onto an Ansys Mechanical shell mesh by connecting the polyflow solution component to a structural model in workbench as shown below. The analogous work flow in AIM, would be to create a second simulation for the structural analysis, but you would be confined to specifying a constant thickness.

Figure 4: Polyflow – Ansys Mechanical Parison Thickness Mapping

In Ansys Mechanical, the mapping comes through within the geometry tree as shown below. The imported Data Transfer Summary is a good way to ensure the mapping behaves as expected. In this case we can see that 100% of the nodes were mapped and the thickness contours qualitatively match the Polyflow results in CFD -Post.

Figure 5: Imported Thickness in Ansys Mechanical

Figure 6: Thickness Data Transfer Summary

A force is applied normal to front face of the sail and simulated in Mechanical. The peak stress and deformation are shown below. The predicted stresses are likely acceptable for a toy, especially since my toy is a sweet submarine. Nonetheless, suppose that I was interested in reducing the deformation in the sail under this load condition by thickening the extruded parison. A logical approach would be to increase the initial parison thickness from 3mm to 4mm for example. Polyflow’s parison programming feature takes the guesswork out of the process. 

Figure 7: Clockwise from Top Left: Applied Load on Sail, Stress Distribution, total Deformation, Thickness Distribution

Parison Programming

Parison programming is an iterative optimization work flow within Polyflow for determining the extruded thickness distribution required to meet the final part thickness constraints. To activate it, you create a new post processor sub-task of type parison programming.   

Figure 8: Parison Programming Setup

The inputs to the optimization are straight forward. The only inputs that you typically would need to modify are the direction of optimization, width of stripes, and list of (X,h) pairs. The direction of optimization is the direction of extrusion which is X in this case. If the extruder can vary parison thickness along “stripes” of the parison, then Polyflow can optimize each stripe thickness. The list of (X,h) pairs serves as a list of constraints for the final part thickness where X is the location on the parison along the direction of extrusion and h is the final part thickness constraint.

Figure 9: Thickness Constraints for Parison Programming

In our scenario, the X,h pairs form a piecewise linear thickness distribution to constrain the area around the sail to have a 3.5mm thickness and 2mm everywhere else. After the simulation, Polyflow will write a csv file with to the output directory containing the initial thickness for each node for the next iteration. You will need to copy over the csv file from the output directory of iteration N to the input directory of iteration N+1. The good news is the optimization converges within 3-5 iterations.

Figure 10: Defining the Initial Thickness for the Next Parison Programming Iteration

Polyflow will print the parison strip thickness distribution for the next iteration in the .lst file. The plot below shows the thickness distribution from the first 3 iterations. Note from the charts below that the distribution converged by iteration 2; thus iteration 3 was not actually simulated. The optimized parison thickness distribution is also plotted in the contour plot below.

Figure 11: Optimized Parison Thickness (Top), Final Part Thickness (Bottom)

Figure 12: % of Elements At or Above Thickness Criteria

As a final check, we can evaluate how the modification to the parison thickness reduced the deformation of the submarine. The total deformation contour plot below confirms that the peak deformation decreased from 2mm to 0.8mm.

Figure 13: Total Deformation in Ansys Mechanical After Parison Programming

Summary

Ansys Discovery AIM is a versatile platform with an intuitive and modern user interface. While Aim has incorporated most of the blow molding simulation capabilities from Polyflow, some advanced functionality has not yet been brought into AIM. This article simulated the blow molding process of a toy submarine to demonstrate three capabilities currently only available in Polyflow: the PolyMat curve fitting tool, automatic parison thickness mapping to Ansys Mechanical, and parison programming. Engineers should consider whether any of these capabilities are needed in their application next time they are faced with the decision to create a blow mold simulation using Ansys Discovery AIM or Polyflow.