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Python to enhance peaks-and-troughs

"can be challenging to see this visually"

Multiple slices are a useful way to view variations along a direction, but what if these variations are such that they are not clearly distinguishable on the contours? This fully-functional Python script outlines how you can do just that. Do invest the few minutes it takes to trace the evolution of the script from problem-statement to fully-functional code: it’s well worth your time.

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Turbulence, revisited

"mesh generation exists to make turbulence modeling seem respectable by comparison"

It’s not every day that a CFD engineer encounters Don McLean, Van Gogh and Turbulence all in one page, so at the risk of going back to basics, check out this article that briefly recaps some salient issues in this phenomenon.

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STEP vs. IGES

"IGES [has] been found to be restrictive"

Probably because it’s almost always included as a free option in CAD applications, the IGES route for data exchange is more widely used than a purist can wish for. Check out this recent article that reviews the differences between IGES and STEP formats, and arrives at the conclusion that few CAE engineers will dispute.

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DOE: Summarize, Extract, Compare

"needs about 10 thousand individual CFD solutions"

This hour long video is well worth watching, but if you’re pressed for time do review the slide-deck at least. Tracing the changes in simulation strategies from the 1990s onwards, the presenters point out how many simulation cases are required to gain an insight into ever more complex phenomena.

Tecplot’s Chorus brings you many, if not all, of the capabilities to make your DOE even more useful. And for those advanced functions you may want, there’s PyTecplot!

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Proximity Based Refinement and The Size Field

Proximity based clustering, whether in Pointwise or Omnis, can make a big difference to your volume grid in some cases but is not critical in others. How can you tell which bucket your grid lies in? Pointwise’s Size Field Gradient is a very useful metric for this: check out this video to learn how it can help identify regions that need the kind of help proximity-effects can offer.

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Tolerances – hidden details

"Many modeling programs don't allow you to set your tolerances."

This is an old article that seems to make that much more sense each time it’s re-read: tolerances in CAD are too often brushed under the carpet, making it appear as if other downstream applications are the guilty parties. Even if you’re an old hand at CAD, this article is strongly recommended.

Both TransMagic and Pointwise put you firmly in charge: let us know if you have questions on these!

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KFour Metrics offers technology solutions for engineering design, simulation and optimization.

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Hyderabad 500 034, India.

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