Ansys Fluent Materials Processing Workspace is a means to explore manufacturing applications such as polymer extrusion, blowmolding, fiber spinning, etc. within the Fluent environment.

This provides a modern user experience for polymer processing simulations, with streamlined setup and wizards for common applications.

Join PADT’s Senior Application & Support Engineer Daniel Chaparro, for a deep dive into the latest updates available for Fluent materials processing in Ansys 2024 R1. 

This presentation focuses on updates regarding the following:

• Rheometry – Display of model properties

• Radiation modeling

• Post-processing control

• And much more

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Trust your simulation results with a software that has been extensively validated across a wide range of applications. With Ansys Fluent, you can create advanced physics models and analyze a variety of fluids phenomena—all in a customizable and intuitive space.

The 2024 R1 release delivers significant enhancements that improve overall solver performance, increase end-user productivity with automation and customization through the PyAnsys ecosystem, and improve workflows to meet the growing complexity of our customers’ CFD use cases.

Join PADT’s Senior CFD & FEA Application Engineer Sina Ghods, for an in-depth look at what’s available for Fluent in Ansys 2024 R1.

This presentation focuses on updates regarding the following:

• PyAnsys
• Meshing
• Heat Transfer
• Workflow & UI
• And much more

View the Recording

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!

One topic of particular interest is the use of graphical processing units (GPUs) for CFD. This is not a new concept, but there are many ways to achieve it — some more complete than others.

From easy, automatic meshing to highly crafted, Ansys provides general purpose, high-performance, automated, intelligent meshing software that produces the most appropriate mesh for accurate, efficient multiphysics solutions. Smart defaults are built into the software to make meshing a painless and intuitive task, delivering the required resolution to capture solution gradients properly for dependable results.

Join PADT’s Senior Application Engineer and fluids expert, Sina Ghods for a look at the latest meshing updates and GPU-Solver capabilities available in Ansys 2023 R2.

This webinar will focus on the following:

• GPU/CPU remapping
• Sliding mesh
• EDM combustion modeling
• And much more

View the Recording

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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!

Published on:	May 1, 2023
With:	Eric Miller, Daniel Chaparro & Jim Reyenga
Description:	In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Senior Application & Support Engineer, Daniel Chaparro as well as Jim Reyenga, Principal Turbomachinery Engineer at Ursa Major, for a discussion on how implementing Ansys can and has benefited those working in the aerospace industry. 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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Why I Care About Ski Rack Aerodynamics with a Box

I have helped Atomic at Colorado-area Labor Day ski sales since around 2008, only missing 2020 and 2021 dues to in-person events not occurring. As I was about to reach out to see what help may be needed this year, I received the text, “Yo dude, long time! Labor Day is happening….do you want to earn some Bents the hard way??” The stoke for the season officially started to build. Even though Labor Day sales have changed drastically from good old days of SNIAGRAB at the Sports Castle in downtown Denver, they are always a blast.

It was great to be back and chatting with people about the season to come and the ‘need’ for the new 120mm underfoot Atomic Bent Chetler with fresh graphics designed as always by Atomic athlete Chris Benchetler. With the ski pass paid for and fresh gear ready to be mounted up, I really started to get excited for the season. No preparation for a ski season is complete without a key ingredient… a ski movie premiere.

Not long after Labor Day sales had wrapped, I got another message, “Yo dude, just circling up to confirm if you can work the TGR events at the Oriental Theater?” This was a surprise, and rightfully so because the message was not actually intended for me, but it turns out help was needed, and I’m always happy to help out. The film this year from Teton Gravity Research is called Magic Hour and was a really fun production with a mix of skiing, snowboarding, and clearly some time for a couple of athletes in a makeup chair. Anyway, I promise I’m getting to the point!

With the Atomic Star banner deployed and a setup of 100mm, 110mm, and 120mm models of the Bent on display, Atomic athlete Sage Cattabriga-Alosa was ready for autographs and some giveaways. While chatting with Sage, it turns out we have wildly different careers (who would have guessed?!) and I know from experience that when “Computational Fluid Dynamics” comes up in conversation outside of meetings at PADT, most people just stare back at me.

However, I recalled part one of this blog and was able to pull it up on my phone and show what I had previously done, which was a perfect connection from the engineering world to a ski movie premiere. One of Sage’s first questions was, “What about a box?” Immediately the wheels start turning in my mind of more analyses while Sage and I chat back and forth on what we think might be better or worse. A box is much larger but has a smoother form factor than a rack and skis. Would that make it better aerodynamically? This article started writing itself.

Use CFD to Look at Ski Rack Aerodynamics

With this backstory complete, I found myself at the computer finding all my old models and, luckily, finding quite a detailed CAD of a roof box on GrabCad. A few minutes later, I had all my versions of CAD for a comparative analysis. This time I’m using the Ansys Fluent Fault-Tolerant Workflow for meshing and Ansys Fluent for my analysis. The Fault-Tolerant Workflow lets me start with my old faceted vehicle and Ansys SpaceClaim-designed rack and ski configurations and create an external flow domain directly in the meshing workflow. The skis are designed to mimic the Atomic Backland 117 from a few years ago, with a good amount of tip-rocker and not much in the tails. All analyses use a flow velocity of 65mph.

The cases I have at the start are:

• Forester Only
• Forester with Rack
• Forester with Rack and Tips Forward
• Forester with Rack and Tails Forward
• Forester with Rack and Bases Up
• Forester with Rack and Box

During the solution, while monitoring residuals, I also set up report definitions for the drag force experienced on the car as well as the rack. With this data in hand, I summarized my results in Excel and created some contour plots using CFD-Post.

I also added one case, which a keen eye would notice is depicted in the fault-tolerant meshing image previously shown, which is a set of 4 pairs of skis with tails forward on the rack. The results summary can be found in the image below:

The data shows that simply installing a rack increases the total drag force by over 9%, and the car with a rack can be used as the new baseline. The most aerodynamic way of having one set of skis would be to split them and put the bases up, but please do not do this, as UV damages the base material and wouldn’t be good for your wax either.

The first advisable way to mount skis of this shape would be tails forward with a 2.5% increase in drag force compared to rack only, followed by tips forward with a 3.7% increase. With the analyses complete for the single pair of skis, the box stands alone with an increase in drag force of nearly 9%. This was when I decided to add the additional case with 4 pairs of skis in a tails forward orientation, as comparing a roof box to a single pair of skis is a case massively underutilizing the box. 4 pairs of skis with the tails forward have a resultant drag force increase of 8.4%.

The conclusions I make from this data are:

1. Installing a ski rack is detrimental to the aerodynamics of the vehicle.
2. Tails forward is slightly more aerodynamic for this shape of ski, so if you can do this and not impact the functionality of your vehicle, mainly opening the hatch on this Forester, go for it!
3. If you are skiing by yourself, put the skis inside the car and don’t use a rack at all.
4. The roof of a car is not the best storage location for an empty cargo box, so I should probably find a better location for the one we keep on my wife’s car…

As far as next steps for more blog posts, Sage and I also talked about bikes and the potential differences between roof racks and hitch racks. There are also plenty of ridiculous scenarios that could be analyzed with things I could easily find on GrabCAD.

Hopefully, this article shows a practical use for Computational Fluid Dynamics, how easy it is to use the new meshing tools in Ansys Fluent, and that you, as an engineer, do have something to talk about with a world-famous skier. If you want to learn more about Ansys CFD or how the consulting team I’m part of can help you answer your questions about performance, contact us.

Comprised of the industry’s most accurate and trusted solvers, users will have confidence in their results.  

Join PADT’s Senior Simulation Support & Application Engineer, and fluids simulation expert Sina Ghods for an exploration of the latest updates and advancements available to users of Ansys fluids tools in 2022.

This presentation will include enhancements made for: 

• General Combustion
• Combustion Engines
• Positive-displace Compressors & Pumps
• CFX & Turbo Tools
• Fluent
• Forte
• 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!

Create advanced physics models and analyze a variety of fluids phenomena—all in a customizable and intuitive space.

Join PADT’s Senior Simulation Support & Application Engineer, and Fluent expert Sina Ghods for an exploration of the latest updates and advancements available to users of Ansys Fluent in 2022.

This presentation covers the updates made to the following:

• Electronic Cooling Analysis

• Acoustics

• Steady-state CFD

• Direct Fourier Transformation (DFT)

• 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!

There is a new workflow that has been developed for the Fluent CFD solver.  It is called gradient-based optimization.  It uses the adjoint solver, which computes the linearized derivatives of a single output variable with respect to all the input variables.  It then calculates separate sensitivity fields for the inputs.  Based on the sensitivity fields, it determines which inputs to change to maximize the desired change in the output variable.

The optimization tool is accessed through the Design tab in the Fluent menu.

There are several observable types that can be optimized for:

The first step in the process is to calculate a steady state solution of the problem.  Once a converged solution has been obtained for steady state solution, an adjoint solution is evaluated to either maximize or minimize the desired observable.

Once the evaluation is completed, the adjoint solution is calculated.

The next step is to use the Design Tool menu to define the wall boundaries that will be modified by the optimization process and what portions of those boundaries.

To perform an individual iteration in the optimization process, click on the Calculate Design Change button in the Design Tool window.  If you are looking to achieve a larger change to the observable, series of iterations will need to be run.  This can be done automatically using the Gradient-Based Optimizer tool.

To test out the capability of this new optimization tool, I ran a simple model of a u-bend pipe and optimized it to reduce the pressure drop through the bend by 40%.  The initial solution of the pipe resulted in pressure contours shown below.

When the optimizer was run to reduce the pressure drop through the model by 40%, the optimization history is as follows:

The resulting pressure contours and pipe geometry are shown below.

The change to the shape of the tube is not something that would be easy to determine without this tool.  It is very easy to use and will allow users to quickly optimize the geometry of their designs.

As you can see, this new capability allows one to quickly optimize flowpath shapes to accomplish optimization objectives. Hopefully you have found this useful and we encourage you to explore this and other enhancements to Ansys Fluent.

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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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!