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Elements: An Engineering Simulation Blog

Serving the engineering simulation community and ANSYS and Rocky DEM users by sharing news, workshops, seminars, training, webinars, tips & tricks, and more.

Latest ANSYS release 2019 R3 offers coupled field analysis, Granta MDS, and more

The latest ANSYS® release, 2019 R3, offers several new features our clients might be interested in.

ANSYS 2019 R3 release ANSYS Software - 3D Design3-D Design

Discovery™ Live now has an interactive topology optimization tool that allows for generative design and improved functionality for simulations, including mass flow outlets and time-varying inputs.

SpaceClaim® now offers automatic surface reconstruction from faceted geometry, converting triangle-based models into CAD models for generative design and reverse engineering. Visualizations have improved, too.

Finally, support for structural beams, linear buckling capabilities, and physics-aware meshing enhancements are now available in Discovery™ AIM®.


ANSYS Software - Additive ManufacturingAdditive Manufacturing

With a new build processor, you can export a build file directly to an AM machine with ANSYS Additive Prep.


ANSYS Software - ElectromagneticsElectromagnetics

Clients using ANSYS® HFSS™, ANSYS® Maxwell®, and ANSYS® Q3D Extractor® have the benefits of high-powered computing from the ANSYS Cloud. With new capabilities for modeling and post-processing, ANSYS HFSS and ANSYS HFSS SBR+ provide even better autonomous system simulation for radar cross-section scenarios. And ANSYS HFSS SBR+ now offers creeping wave physics.


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How to Borrow ANSYS Licenses for Maximum Productivity

ANSYS Borrow UtilityMost of our customers, especially medium-to-large organizations, keep ANSYS® software licenses on a corporate network server. This network-enabled (floating) licensing allows engineers across the organization to have access when they need it.

Each organization has different needs for ANSYS products. One organization might be involved exclusively with structural analyses, so they need multiple seats of ANSYS® Mechanical™ Workbench™. Another organization might be focused on electric motor design and need a mix of ANSYS Mechanical Workbench, ANSYS® Fluent®, and ANSYS® Maxwell®.

Sharing licenses across a corporate network works great, but everyone must be connected to the network. A license is “checked out” when an ANSYS session is started up and “checked in” once the session is closed. This “checked out/in” process is controlled by the ANSYS License Manager utility on the corporate network.

However, an engineer may need access to a license while he or she is away from the office (e.g traveling to a customer site). The engineer can then “borrow” or “check out” a license for a certain period of time, but that license it is not available to the other engineers during that extended period.

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Electric Machine Design in ANSYS

As electric machines become smaller and faster, designers face the growing challenge of delivering machines that meet all the electrical, mechanical, and thermal design goals in a very limited timeframe.

Electric machine design in ANSYSElectric Machine AnalysesFor example, in the automotive industry, electrical machines commonly need to be:

  • Compact, given the limited space available
  • Lightweight and Efficient, with increased driving range and extended battery life
  • Quiet, for maximum passenger comfort

With multiple types of analyses required, designers need to seamlessly move from one analysis to another efficiently. And a problem that presents itself downstream may require that upstream analyses be revisited. For instance, if the thermal analysis reveals an overheating issue, then perhaps the upstream electrical analyses needs to be adjusted and the process started again. Furthermore, once an acceptable design is completed, the design may not yet be optimal. It just means that the design is in the ballpark.

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Modeling Mixing Tanks Using ANSYS CFD

In manufacturing settings, a mixing tank is often used to prepare materials for production. Large amounts of materials are put into an enormous tank in order to blend components together through refined mixing.

cfd simulation of mixing tank processCFD Simulation of Mixing Tank Process
Mixing tanks are an important piece of equipment in industries such as:

  • Water/Effluent Treatment
  • Pharma/Bio-Tech
  • Biofuels
  • Cosmetics
  • Oil & Petroleum
  • Mineral Processing
  • Flue Gas Desulpherization
  • Paints & Coatings
  • Adhesives & Sealants
  • Polymer & Plastics
  • Mining
  • Chemical Processing

The $64,000 question for the manufacturer: Do the quality and consistency of the final mixture meet the intended goals? If not, what needs to change? Obviously, the manufacturer can adjust the material inputs, the speed of the mixer, and other factors through trial and error. However, this approach provides information only on the inputs and outputs. If I add so much of product A and so much of product B, and mix at a certain speed for a certain time and at a certain temperature, then I get product C. This method doesn’t offer much information on the actual mixing process itself.

Computational Fluid Dynamic (CFD) simulation software can provide much more insight into the mixing process, showing the manufacturer a detailed picture of what is happening inside the tank and how the materials are reacting over time. For example, what if the mixing process could be shortened by 30 seconds? What kind of economic impact would that make?

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Stress Linearization in ANSYS Workbench compatible with ASME BPVC

Stress Linearization in ANSYS Workbench compatible with ASME BPVCStress linearization is a technique used to decompose a through-thickness elastic stress field into equivalent membrane, bending, and peak stresses for comparison with appropriate allowable limits.

  • Membrane stress is the average stress through the thickness (P/A)
  • Bending stress is the linearly varying stress through the thickness (Mc/I)
  • Peak stress is the total stress minus the membrane plus bending stress

Stress linearization was developed in the pressure vessel industry by Kroenke and Gordon in the 1970s. It was first implemented in Section III (nuclear vessels) and Section VIII, Division 2 (commercial vessels) of the ASME Boiler and Pressure Code. Although widely used in industry thereafter, specific guidance was not included in ASME Boiler & Pressure Vessel Code (BPVC) Section VIII Div. 2 until 2007.

While ANSYS Workbench can be used to validate designs, care must be taken in how the stresses and their locations are handled.

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