How to understand the MARKER_SYM

zhang-qiang · February 11, 2023, 07:25

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)?

bigfootedrockmidget · February 11, 2023, 09:57

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.

February 11, 2023, 07:25	How to understand the MARKER_SYM	#1
zhang-qiang Member zhangqiang Join Date: Nov 2022 Posts: 43 Rep Power: 3	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)?

February 11, 2023, 09:57		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 585 Rep Power: 17	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.