June 17, 2019 at 9:21 amxavierBAMSubscriber
Hello, I was doing some meshing quality control and, when I got to understand what Aspect Ratio and Skewness was, I could get what's the difference between these two parameters. Could anybody explain? Thanks
June 17, 2019 at 10:48 amRobAnsys Employee
They're different ways of working out mesh quality and (generally) serve to check for different problems. What do you think each means?
June 17, 2019 at 12:05 pmxavierBAMSubscriber
It just looks like they are very similar in the way they value the quality of the mesh. How similar to a perfect triangle and how similar the lengths of the sides are looks too much a like for me. When would you use each one of them?
June 17, 2019 at 12:39 pmRobAnsys Employee
Ah, OK, you've not quite picked up the maths.
Skew is a function of the ratio internal angles against the "perfect angle".
Aspect ratio is a ratio of the edge lengths.
Look in the help documentation under Meshing and there should be images explaining it. For tri/tet elements a high aspect ratio means high skew: for a quad/hex element high aspect ratio can still have zero skew. Sketch the two shapes (triangle & square) and stretch them then compare to the documentation.
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