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How to understand the MARKER_SYM

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Old   February 11, 2023, 07:25
Default How to understand the MARKER_SYM
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zhangqiang
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I am learning the tutorial: TestCases/incomp_navierstokes/bend, there is a MARKER_SYM in the configuration file.

What's the meaning of MARKER_SYM = (SYMMETRY) or MARKER_SYM = (NONE)?
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Old   February 11, 2023, 09:57
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bigfoot
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It is a symmetry plane:
https://www.math.net/plane-symmetry


If the object has such a symmetry, then it is sufficient to simulate only half of the object.
In the case of the bend, the flow in the upper half is the same as the lower half, but mirrored in the symmetry plane.
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