SpaceClaim Meshing & Geometry Updates in Ansys 2021 R2 – Webinar

Engineering exploration via simulation is virtually risk free because engineers are no longer bound to an expensive and time-consuming prototype-test-redesign cycle. New design ideas can be virtually evaluated in hours, not weeks, freeing up time to optimize the best design candidates or develop moonshot ideas that redefine markets. 

Ansys 2021 R2 continues to expand geometry capabilities and ease of use for every engineer to unlock innovation and increase productivity throughout the product development process. In addition, every analyst can also benefit from Ansys Discovery’s geometry modeling workflows for model prep for simulation.

Join PADT’s Application Engineer and geometry/meshing expert Robert McCathren to learn how you can leverage SpaceClaim’s improvements in Ansys 2021 R2 including: 

  • Discovery Modeling
  • Licensing Changes
  • Meshing
  • Sketch Constraints
  • And much more

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Mechanical Updates in Ansys 2021 R2: External Models, Composites & Meshing – Webinar

Ansys Mechanical delivers features to enable faster simulations, easier workflows, journaling, scripting and product integrations that offer more solver capabilities. 

With the Ansys suite of tools, engineers can perform finite element analyses (FEA), customize and automate solutions for structural mechanics challenges and analyze multiple design scenarios. By using this software early in the design cycle, businesses can save costs, reduce the number of design cycles and bring products to market faster.

Join PADT’s Lead mechanical engineer Doug Oatis to discover the new features that have been added to Ansys Mechanical in the first webinar covering the 2021 R2 release.

Highlights include unlimited modeling possibilities with journaling and scripting in the Mechanical interface and increased meshing efficiency and quality for shell meshing, among many others.

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A Comparison of ANSYS Fluent Meshing and Ansys Meshing for CFD

If you have ventured into Computational Fluid Dynamics (CFD), you know that the meshing process can be laborious, but critical to the solve-time and solution accuracy. You may have also noticed that there are a lot of meshing tools to choose from, and while it is tempting to think of them as a commodity, they certainly are not. The types of meshes and the workflows available in the tool can make or break your simulation (and your mood). 

Ansys Meshing and Ansys Fluent Meshing are the two most used Ansys meshing tools for CFD. It is thus useful to learn about the commonality and difference between the two. Common questions new (and existing users) have are:

  • How do the two tools fit into the Ansys CFD workflow?
  • How are the two tools different?
  • When is one tool preferred over the other?

Let us start with how these two fit into the Ansys CFD workflow. In particular, let us cover how both integrate with Ansys Workbench.

Ansys Meshing Workbench Integration

Ansys meshing is a staple of the workbench environment. Its physics-aware mesh settings allow you to tailor meshes for Electromagnetics, Structural FEA, CFD, etc. One can drag a mesh component system onto the project or bring it in as part of an analysis system. Figure 1 shows Ansys meshing component in Workbench as well as the CFD analysis systems with Ansys meshing. It is seamless.

Figure 1: Ansys Meshing Workbench Integration

Fluent Meshing Workbench Integration

Many users use Fluent Meshing in standalone mode instead of Workbench as part of the “New Fluent Experience Workflow.” However, Fluent meshing is available in Workbench as well. You can import Fluent Meshes to Polyflow and CFX, not only Fluent. Note that to do so, one must enable the beta feature in the workbench options as shown in Figure 2 to allow connections between Fluent Meshing and Polyflow or CFX.

Figure 2: Fluent Meshing Workbench Integration

Meshing Topologies

Fundamental to meshing is cell topology. It is important to first note that Fluent meshing is a strictly 3D mesher, while Ansys meshing can generate 2D and 3D meshes. In 3D, both tools can generate meshes with tet, hex, prism/wedge, and pyramid elements. Fluent’s Mosaic Meshing technology sets itself apart by leveraging conformal polyhedron elements. Polys offer advantages over tets in that they greatly reduce cell count, offer good gradient calculations because of the additional faces, while still being easy to use for complex geometries.

Figure 3: 3D Element Types, Polyhedrons are Only Available in Fluent Meshing

Conformal vs Nonconformal Meshes

Keep in mind that not all CFD tools are compatible with non-conformal meshes. Reminder, conformal meshes match every node to a node in the adjacent cells. Ansys CFD tools can handle non-conformal mesh mapping at interfaces i.e. a coarse solid mesh interface with a fine fluid mesh. However, CFX and Polyflow are not compatible with non-conformal cell structures like standard Fluent meshing hex-core meshes with 1/8 octree transitions. Do not worry though, Fluent meshing users can now easily fill in these transitions with pyramids via the advanced setting “Avoid 1/8 octree transition” and thus achieve a conformal cell structure.  

Figure 4: Fluent Meshing Conformal Hex-Core is Compatible with Ansys CFX and Polyflow

Volume Mesh Methods

The volume mesh methods available in these two tools have some commonality but also significant differences. Often the decision as to which tool should depend on which mesh method is most appropriate for your geometry and your real-world constraints like computing power, project deadlines, accuracy requirements, etc. For example, if your manager comes by your desk and tells you he wants a rough estimate for pressure drop through a manifold by the end of the day, you probably do not have time to block off a structured mesh with perfect boundary layer resolution. Figures 5 and 6 provide a high-level comparison of the methods available in both tools and you should use them to guide you as you plan your CFD model.

Figure 5: Ansys Meshing Volume CFD Mesh Methods

Figure 6: Fluent Meshing Volume Mesh Methods

Meshing Workflows

So how do you use these tools? Let us review that next because while the general steps are similar, the workflow from cad to finished mesh differs significantly.

Ansys Meshing Workflow

I would sum up the Ansys meshing workflow as flexible, parametric, and iterative. It is flexible in that you can mix/match mesh methods for different bodies and sequence them as you wish. Your control of the mesh can be as simple as accepting the physics-aware global mesh control defaults or you can take a fine comb and specify edge, node, face, body sizing, etc. in any sequence to achieve mesh refinement exactly where you want it. It is parametric in that you can have all controls be driven by user-defined name selections. These name selections can be automated based on size/ location/ associativity via the worksheet tool allowing you to update your geometry and have mesh settings propagate through. Lastly, it is iterative because you can generate the mesh for sections of the model, check quality metrics, and iterate until the mesh is ready for analysis.

Figure 7: Ansys meshing Workflow

Fluent Meshing Task-Based Workflows

Two task-based workflows are available in Fluent meshing and they cover most use cases: Watertight and Fault-Tolerant. These workflows guide users step by step through the meshing process beginning with geometry and import and ending in volume mesh generation. These workflows are customizable and can be saved to be re-used in future analyses.

Figure 8 compares the two workflows at a high level. As the names suggest, the watertight workflow is used for fluid and/or solid geometry that is relatively clean and watertight. Most users opt for this workflow when they are fortunate enough to have clean geometry or after using the capable geometry clean-up tools in Ansys Spaceclaim.

However, sometimes CAD is very dirty and/or composed of many parts that make it a laborious undertaking to clean up. The fault-tolerant meshing (FTM) workflow excels here. FTM can be used with all major CAD formats like STL, JT, etc. The best way to visualize FTM for external flow applications is to picture shrink wrapping a car. For internal flow, picture blowing up a balloon inside the part. The “wrapping” process covers up small leakages and errors in the CAD. You use the wrap to build a surface mesh and then a volume mesh.

Figure 8: Fluent Meshing Task-Based Meshing Workflows

Usability Features

Figure 9 lists some notable usability features in both tools to consider when deciding which tool is best for the project. The list is of course not exhaustive, but those listed are notable when it comes to having an efficient meshing experience. 

Figure 9: Comparison of Usability Features in Ansys Meshing and Fluent Meshing

Summary

To summarize, both Ansys Meshing and Fluent Meshing generate high quality meshes and they provide convenient usability features for efficient and accurate CFD analysis.

Notable differences between the two include:

  • Cell types/ Methods:
    • Fluent Meshing’s Mosaic-Enabled Parallel Poly-Hexcore Meshing combines high geometry fidelity, cell quality and fast solve time.
    • Ansys Meshing Sweep and Multi zone meshing enable users to create structured (primarily) hex meshes with intuitive control and flexibility.
  • Workflows
    • Fluent Meshing’s task-based workflows are easy to use and tailored to the most common CFD applications.
    • Ansys Meshing provides a flexible environment allowing users to leverage smart physics-based global controls while also providing detailed local mesh control.
  • Usability Features
    • Fluent meshing offers the ability to create custom workflows that can include journal files, local sizing and automatic mesh improvement tasks.
    • Ansys meshing worksheets enable mesh operation recording and name selection definition based on size, location, or topology for mesh control

Some readers are likely still interested in the answer to the blunt question: Which tool should I use?

Well, it depends:

  • When using Fluent to solve, the Poly-Hexcore mesh topology offers a clear advantage making Fluent Meshing the likely choice.
  • When using CFX or Polyflow, you can still leverage conformal hex-core meshing or tetrahedral meshes in Fluent Meshing, but the robust integration of Ansys meshing with CFX/ Polyflow makes it the preferred tool.
  • If a structured hex mesh is needed or preferred to minimize mesh size or to align the mesh with the flow direction everywhere, then Ansys meshing offers a more user-friendly environment for this topology via sweep or multizone meshing.

Signal & Power Integrity Updates in Ansys 2021 R1 – Webinar

The use of Ansys Electronics solutions minimizes the testing costs, ensures regulatory compliance, improves reliability and drastically reduces your product development time. All this while helping you build the best-in-class and cutting-edge products.

With signal and power integrity (SI & PI) analysis products, users can mitigate many electrical and thermal issues affecting printed circuit boards such as electromagnetic interference, crosstalk, overheating, etc. Ansys integrated electromagnetics and circuit simulation tools are essential for designing high-speed serial channels, parallel buses, and complete power delivery systems found in modern high-speed electronic devices.

Leverage the simulation capability from Ansys to solve the most critical aspects of your designs. Join PADT’s Electronics expert and application engineer Aleksandr Gafarov for a detailed look at what is new for SI & PI in Ansys 2021 R1, including updates available within the following tools:

• SIwave – Granta support & differential time domain crosstalk

• Q3D – Uniform current terminals

• Circuits – Network data explorer & SPISim

• HFSS 3D – Parallel meshing, encrypted 3D components & IC workflow improvements

• Electronics Desktop – Ansys cloud, Minerva & optiSLang integration

• And much more

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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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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

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All Things Ansys 081: Meshing & UI updates in Ansys Fluent 2021 R1

 

Published on: February 8th, 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 Simulation Support & Application Engineer and fluids expert Sina Ghods for a look at what’s new in this release.

For fluids simulation in this release, products can be designed faster than ever before, thanks to major physics and productivity enhancements that build upon the tool’s ​already powerful workflow and meshing capabilities.

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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Workflow & Meshing Updates in Ansys Fluent 2021 R1 – Webinar

From small to mid-sized companies to global organizations, companies of every size seek new ways for pioneering breakthrough innovations that are safer and more reliable to win the race to market.

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.

For fluids simulation in this release, products can be designed faster than ever before, thanks to major physics and productivity enhancements that build upon the tool’s ​already powerful workflow and meshing capabilities. Join PADT’s Senior Simulation Support & Application Engineer and fluids expert Sina Ghods for a look at what’s new in this release including: 

• Fluent User Interface Updates

      • Meshing Workflow Advancements

      • Combustion Applications

      • Turbomachinery Applications

      • Battery Modeling Applications

      • Multiphase and DPM Improvements

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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).

3D Design Updates in ANSYS 2020 R1 – Webinar

The ANSYS Discovery 3D Design family of products enables CAD modeling and simulation for all design engineers. Since the demands on today’s design engineer to build optimized, lighter and smarter products are greater than ever, using the appropriate design tools is more important than ever. With ANSYS you can explore ideas, iterate, and innovate with unprecedented speed early in your design process. Delve deeper into design details, refine concepts and perform multiple physics simulations — backed by ANSYS solvers — to better account for real-world behaviors.

Capabilities in this tool-set allow engineers to increase speed and reduce costs from the start of the design cycle, all the way to product launch. Improve engineering productivity and accelerate development time, create higher-quality products while reducing development & manufacturing costs, and respond quickly to changing customer demands while bringing new products to market faster than the competition.

Join PADT’s Training & Support Application Engineer, Robert McCathren for a look at whats new & improved when it comes to these tools in ANSYS 2020 R1. This update includes new releases for ANSYS Discovery Live, AIM, and SpaceClaim, focusing on areas including:

  • Simulation of Thin Parts
  • Topology Optimization in Discovery Live
  • Structural Material Properties
  • Physics Aware Meshing
  • Beam and Shell Modeling
  • And much more

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ANSYS Mechanical: Mesh Time Metric Display

The things you find out from poking around the Enhancement Request list…

Did you know that you can get ANSYS Mechanical to report the amount of time that the meshing takes? I didn’t until I stumbled across this little gem on the request to show mesh time metrics.

This option is already available for many releases now. Users can turn performance diagnostics by setting to Tools -> Options -> Miscellaneous -> “Report Performance Diagnostics in Messages” to Yes inside Mechanical.

So, of course, I tried it out.

This was in version 2020R1, but it says that the option has been there since R19.0.  Now they just need to add it to the Statistics section of the Mesh Details so that we can use it as an output parameter.

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

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Fluids Innovations in ANSYS 2019 R3 – Webinar

Products such as ANSYS Fluent, CFX, and Ensight work together in a constantly improving tool kit that is developed to provide ease of use improvements for engineers simulating fluid flows and the impact those flows have on physical models. 

Fluids simulation users will find that ANSYS 2019 R3 includes many enhancements that further simplify the user experience and broaden use to new applications. The new Fluent experience has been improved so you can enjoy more CFD in less time, with less training.

Join PADT’s Simulation Support and Application Engineer, Sina Ghods, for a look at what is new and improved for fluids simulation tools in ANSYS 2019 R3. This presentation includes updates regarding: 

  • Usability Enhancements
  • Watertight Geometry Workflow
  • TurboGrid & BladeEditor
  • Meshing Enhancements
  • And many more innovative capabilities

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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

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Meshing Updates in ANSYS 2019 R2 – Webinar

An intelligent, high-quality mesh is at the core of any effective simulation based model; creating the basis for what will help to drive valuable results for even the most complex engineering problems.

Among a variety of tools in ANSYS 2019 R2 are enhanced meshing capabilities that can help reduce pre-processing time and provide a more streamlined solution.

Join PADT’s Specialist Mechanical Engineer, Joe Woodward for a look at what new meshing capabilities are available in the latest release of ANSYS. This presentation will focus predominately on updates regarding:

ANSYS Mechanical Meshing
Batch Connections
Axisymmetric Sweep
Layered Tetrahedron Enhancements
Local Sizing Enhancements
SpaceClaim Meshing
Parameter Management
Direct Modeling/Meshing
Hex Meshing
Block Decomposition

And much more!

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