Meshing in the New Ansys Fluent Task-based Workflows

Working with a variety of users with different levels of CFD (Computational Fluid Dynamics) backgrounds, I have to admit that Fluent meshing used to be a challenging and confusing task for beginners and even intermediate users.

Ansys has addressed this challenge by redesigning the Fluent user interface to provide a task-based workflow for meshing that enables engineers to do more and solve more complex problems than ever before in less time. The new Fluent task-based workflow streamlines the user experience by providing a single window that offers only relevant choices and options and prompts the user with best practices that deliver better simulation results.

Best practices are embedded into the workflow in the form of defaults and messages to the user. This reduces the amount of training required to start using the software and makes it easier for occasional users to return to the software.

How to Mesh Watertight CFD Geometry in the New Ansys Fluent Task-based Workflow

In order to use this workflow, you need a relatively clean watertight solid and/or fluid regions that can be meshed by surface meshing and then volume filling (no wrapping required.) Geometry can consist of single or multiple bodies.

Going through the task-based workflow is straightforward. You are presented with several steps, like:

  • Surface mesh.
  • Describe geometry. (Fluid and/or solid)
  • Capping. (If you are creating an internal flow volume, then the capping tools in Fluent makes extraction easy)
  • Volume meshing. (If you wish to use the latest Mosaic meshing technology, select “Poly-hexcore”)
Mosaic Meshing Technology

Now, click on “Switch-to-Solution,” to bring the mesh into a familiar Fluent interface.

Fault-Tolerant Workflow for Ansys Fluent Meshing Wraps and Seals Leaks and Gaps

Sometimes CFD simulations contain dirty, non-watertight geometries. For instance, 3D scanned or manufacturing geometry files. These geometries may contain missing faces, gaps, holes, overlaps, and other issues. As a result, they require extensive cleanup before simulation.

To overcome this obstacle, Ansys offers a new Fluent meshing workflow that wraps dirty geometry without cleanup.

The workflow for non-watertight geometry offers distinct advantages over other meshing technologies such as:

Part management:

Users can perform CAD-level changes to any geometry or assembly, including dragging and dropping objects from the CAD model into the simulation model.

Leakages and overlaps:

The fault-tolerant workflow seals leakages caused by gaps and misalignments between solid bodies. This significantly reduces the manual efforts required to clean up geometry.

The fault-tolerant workflow can easily wrap leaky geometry

STL file input

The workflow can create fluid regions directly from STL files or scanned data. This eliminates the need to convert STL files into solid geometry for the biomedical, oil and gas, automotive and other industries.

Imported STL File

2020R2 updates:

There are a few important improvements both in Watertight meshing (WTM) and Fault-Tolerant meshing (FTM) workflows in the 2020R2 release.

FTM/WTM: Wild card selection in lists

The Meshing Workflows now have an option to use a persistent Wildcard string for selecting labels or zones. This is in addition to the Filter Text option previously available. The new Use WildCard option stores the wildcard string itself in recorded workflows instead of an explicit list of locations so that when they are played back with new geometries, the matching will be performed again and pick up any matching zones/labels that were not in the earlier geometry.

WTM: Support of Region-specific Sizing 

You can specify region-specific Max Size and Growth Rates during the Volume Meshing task.  If you enable Region-based Sizing, Fluent will compute default sizing specifications for each region.  These can then be adjusted as required for each region.

WTM: Start From Imported Surface Mesh

This is useful if you have an established surface-meshing workflow or if you already have a mesh generated (perhaps from another preprocessor or an existing Fluent case) and want to use that as a starting point for Fluent meshing. Once you import the surface mesh you have the option of using it as it is, or selectively adding additional Local Size controls and/or remeshing particular surfaces as needed.

FTM: Continuous prism layers for Poly and Poly-Hexcore for Fluids

For the Fault-Tolerant Meshing Workflow you can now create continuous prism layers without stair-stepping within poly and poly-hexcore fluid regions.  Note that this will apply in all zones of the region.

WTM: Support of Local Sizing on Labeled Edges

Once you have labeled the edges, you can select Edge Size in Add Local Sizing to prescribe a target size on the selected edge(s).

All Things Ansys 074: Design & Digital Engineering Updates in Ansys 2020 R2

 

Published on: October 19th, 2020
With: Eric Miller & Robert McCathren
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Application Engineer Robert McCathren for a look at 3D product design and updates for Ansys Discovery AIM, Live, and SpaceClaim in 2020 R2.

If you would like to learn more about this update, you can view Robert’s webinar on the topic here:

https://www.brighttalk.com/webcast/15747/440598

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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Design & Digital Engineering Updates in Ansys 2020 R2 – Webinar

The Ansys Discovery suite of tools allows engineers to improve their 3D design capabilities, by increasing productivity, improving product quality, and spurring innovation. Explore ideas, iterate and innovate with unprecedented speed early in your design process with Ansys 3D design software. You can check melodyeotvos for all the latest updates.

Delve deeper into design details, refine concepts and perform multiple physics simulations to better account for real-world behaviors. 

Join PADT’s Application Engineer Robert McCathren for a look at 3D product design and updates for Ansys Discovery AIM, Live, and SpaceClaim in 2020 R2.

In the Ansys 2020 R2, users can explore large design spaces and answer critical design questions early in the product design process without waiting days or weeks for traditional simulation results.

Additionally, these tools have been upgraded to support concept modeling and model prep for importing modified CAD geometry, auto-skinning topology optimization results from Ansys Mechanical for automated geometry reconstruction, and so much more.

Register Here

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All Things Ansys 073: LS-DYNA Updates in Ansys 2020 R2

 

Published on: October 5th, 2020
With: Eric Miller & Jim Peters
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Senior Staff Technologist Jim Peters to discuss the capabilities of the explicit simulation tool LS-DYNA, and look into what’s new in the 2020 R2 version of the latest Ansys acquisition.

If you would like to learn more about this update, you can view Jim’s webinar on the topic here: https://www.brighttalk.com/webcast/15747/440598

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 072: Building Digital Twins in Ansys 2020 R2

 

Published on: September 21st, 2020
With: Eric Miller, Matt Sutton & Josh Stout
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Senior Analyst & Lead Software Developer Matt Sutton, and Systems Application & Support Engineer Josh Stout for a discussion on the advantages of using Ansys Twin Builder to create simulation-based virtual replicas of physical assets for testing, as well as what’s new and improved for this tool in the 2020 R2 release.

If you would like to learn more about this update, you can view Matt’s webinar on the topic here: https://www.brighttalk.com/webcast/15747/437059

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 071: Structural Optimization & Additive Improvements in Ansys 2020 R2

 

Published on: September 8th, 2020
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 for a discussion on what you can expect from the latest advancements in topology optimization and simulation for additive manufacturing, available in Ansys 2020 R2. This update spans a variety of areas, including optimizing setup, modifying STL files, parameter free morphing, and much more.

If you would like to learn more about this update, you can view Doug’s webinar on the topic here: https://www.brighttalk.com/webcast/15747/433058

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 070: Optimizing Electronics Reliability with Ansys Sherlock

 

Published on: August 24th, 2020
With: Eric Miller & Josh Stout
Description:  

In this episode your host and Co-Founder of PADT, Eric Miller is joined by PADT’s Application & Support Systems Engineer, Josh Stout for a discussion on the unique capabilities of Ansys Sherlock, and what’s new for the tool in 2020 R2.

If you would like to learn more about this update, you can view Josh’s webinar on the topic here: https://www.brighttalk.com/webcast/15747/428230

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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SPISim – New addition to the Ansys Electronics family

In this article, I would like to introduce some new features added to the Ansys Electronics Solution 2020R2 release called SPISim. Since this is a new tool, I’ll focus on describing its capabilities as well as some possible applications.

What is SPISim?

Signal, Power Integrity and Simulation (SPISim) focuses on system-level and on-chip SI/PI modeling, simulation, and analysis. The tool presents a variety of different features, which are split on separate modules shown below.

Let us look at each module individually and highlight the key functionality.

There are 2 main Modules VPro and MPro. All the other features (sub-modules) are split between these main two.

VPro Core

This is a versatile GUI for viewing waveforms. It supports a wide variety of formats including .tr0, .ac0, .ibis, .csv, .mat, .raw, .snp, .citi, and more. Besides simple viewing capabilities, VPro can also be used for waveform analysis:

  • Overshoot and Undershoot (for Peaks and Valleys)
  • Threshold Crossings
  • Min/Max Peak-2-Peak
  • Root-Mean-Square Value 
  • FFT, iFFT
  • Correlation
  • Pulse to PDA

Using the information about waveforms, this tool can also plot an eye diagram, perform simple correlations, and run measurements. The viewer also supports framework scripting on JavaScript, Ruby, TCL, etc.

DPro Unit (VPro Module)

DPro (short for DDR Pro) provides comprehensive DDR related post-processing analysis. Key functionalities of this tool:

  • Batch mode of processing one or more waveform files
  • Support of multiple receiver processing
  • Built-in and customizable derating table and derating processing
  • Built-in 100+ measurement functions for typical DDR signal analysis
  • Results cross-probing and show problematic location automatically

The feature is organized in a wizard-like style. The user simply needs to fill out information in 6 tabs and click the ‘Run’ button. Overall, it is very intuitive to use, but like any new features, there is a learning curve for a new user.

TPro Unit (VPro Module)

It provides comprehensive transmission line related modeling, analysis, post-processing, and viewing capabilities. Here are several main functionalities offered by this add-on:

  • Comprehensive stackup planner to model t-lines’ performance in different stackup configurations
  • Advanced t-line modeling viewer for rapid analysis such as impedance, crosstalk, or propagation delay analysis
  • A table viewer for RLCG frequency content
  • What-if analysis for quick impedance/crosstalk calculation, and data processing, such as trimming and merging of frequency points
  • Batch mode processing and measurements for one or more t-line model files, result is a plain .csv file ready for further modeling or analysis

This feature helps the user to run pre-layout ‘what-if’ analysis. Both ‘transmission line analyzer’ and ‘layer stackup planner’ give the user a flexible way of understanding potential design constrains and guidelines.

SPro Unit (VPro Module)

This module is similar to TPro in a sense of the capabilities. However, it is directed to view and analyze S-parameters instead of tabular transmission line data. Also, in contrast to TPro, this feature has a separate tab ‘S-Param’ with all the features listed there.

Here are major capabilities of SPro:

  • Advanced s-parameter viewer for speedy analysis such TDR/TDR or PDA analysis
  • Table viewer for frequency content; export s-parameter data to matlab .mat format and more
  • 20+ advanced analysis functions such as mixed-mode conversion, cascading and renormalization
  • Batch mode processing and measurements for one or more s-parameter files
  • Support customizable s-parameter reporting generation for lab automation and beyond

Besides the conceptual similarities with the TPro, S-parameter’s waveform viewer based on VPro waveform viewer. Therefore, all operations available in VPro can also be found in S-parameter viewer.

Signal Generator Unit

This tool allows the user to generate a signal and use it in a future analysis. The generator offers wide variety of signal patterns (such as PRBS, Pulse, Sine, Square, Sawtooth etc) in combination with the PAM4 and NRZ modulation schemes. The user needs only to specify parameters for the signal and then create it.

This simple, but very powerful feature helps to save time for the engineer. 

MPro Core

By definition, MPro is a modeling unit, which helps the user to work with the data. However, modeling can mean different things. The main advantage of MPro is providing the user with the simple environment for data manipulation. Here are all main functionalities of this core module:

  • Table data processing: combine, extract, summarize statistically, etc
  • Plan sampling with design of experiments, full factorial, Monte Carlo, etc
  • Simulate or collect data using customizable scripts, supporting multi-CPU/multi-thread
  • Visualize data in statistical, 2D or 3D plots
  • Model data using response surface modeling, neural network (feed forward and radial basis), etc
  • Optimization using linear, nonlinear, or genetic algorithm methods

BPro IBIS and AMI Unit (MPro Module)

BPro is one unit, however in this description I have purposefully separated it into two – BPro IBIS and BPro AMI, because the functionality of BPro is very broad. It is easier to focus on a one thing at a time.

Generally, BPro brings comprehensive IBIS related modeling, analysis, post-processing, and viewing capabilities to user. In more detail:

  • Has an inspector to view IBIS model’s textual content and visualize various waveform/current table easily. Tool also allows manual editing of model data with a simple mouse click and drag
  • Built-in advanced IBIS model generation flow from either scratch or existing simulation data. Tool will guide user from modeling setup, spice decks generations, simulation, modeling, syntax checking with golden parser, validation to final figure of merits (FOM) reporting
  • Support batch mode generations of performance reports for one or more model files. Results are in .csv file format and can be used for further analysis
  • IBIS model generation from Spec. or data sheet without performing any simulation. Generated model will also have two sets of waveforms under different loading conditions

Under ‘IBIS’ menu tab, the user will find separate sets of commands for both IBIS and AMI, as well as commands for IBIS-AMI in general.

Summary

This new addition to Ansys Electronics Solution brings a very wide variety of features to engineers. All Waveform Viewer, Signal Generator, IBIS-AMI modeling, DDR analysis, Data optimization, and Transmission line planner are united under one tool – SPISim. We can launch this tool either from within Ansys 3D Layout or SIwave, and, in 2020R2, is accessible through the Electronics Enterprise license.

Here is an overview of the SPISIm functionality:

Besides developing the help documentation and video demos, SPISim engineer team provides users with the detailed information about the tool in their blog – http://www.spisim.com/blogs/blog-articles-index/  and helps to fill out the technical ‘gaps’ by sharing the reference material – http://www.spisim.com/products/ami-spisims-ibis-ami/academic-serdes-ami-reference/

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

Windows Update KB4571756 Triggers Error 3221227010 for Ansys Electronics Products

On September 7, 2020 Microsoft released a Windows update KB4571756, which may cause the Ansys electronic products to fail with the Error:

3221227010 at ‘reg_ansysedt.exe’ and ‘reg_siwave.exe’ registration.

This is the error message, users would see if they right-mouse-click and run the following file as administrator:

C:\Program Files\AnsysEM\AnsysEM20.2\Win64\config\ConfigureThisMachine.exe

To resolve this issue, here are the steps we recommend users take:

  1. Revert the updates.
    1. If the issue is not resolved or something your IT won’t let you do, continue to the next steps.
  2. Set an environment variable that turns off the driver that is causing the error. 
    1. Use windows search and type “system environment” and click on “Edit the system environment variables”
    2. This opens the “System Properties” tool
    3. Go to the “Advanced” tab
    4. Click on “Environment Variables…” at the bottom
    5. In the System Variables window click on “New…”
    6. Create the following variable:

      Variable Name: ANSYS_EM_DONOT_PRELOAD_3DDRIVER_DLL
      Variable Value: 1
    7. Click OK 3 times to exit out of the tool and save your changes. 
  3. If the issue is still not resolved, there is one more step:
    1. Go to C:\Program Files\AnsysEM\AnsysEM20.2\Win64\config\
    2. Right-Mouse-Click on “ConfigureThisMachine.exe” and run as Admin. 

If these steps helped to resolve the issue, you will see the following info message when ‘ConfigureThisMachine.exe’ is run:

If this does not work, please contact your Ansys support provider. 

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!

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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!

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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

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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!

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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

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