Non-dimensional Mesh?

ialqadi · March 19, 2022, 07:22

Hello,
I was wondering if I need to nondimensionalize the mesh if I am running SU2 in nondimesional mode?
Or does SU2 perform spatial nondimensionalization?

ShiheJia · March 20, 2022, 01:57

Here is a manual for the non-dim issues:
https://su2code.github.io/docs_v7/Physical-Definition/

The ref. value of length is 1 which means you can just use one mesh for both dim and non-dim mode.

Chao_975 · February 1, 2024, 23:36

Dose the REYNOLDS_LENGTH in cfg file means the real length of 1 in the mesh file?
For example, the REYNOLDS_LENGTH=1m represents the 1 in the mesh file is 1meter?
the REYNOLDS_LENGTH=0.001m represents the 1 in the mesh file is 0.001 meter?

bigfootedrockmidget · February 2, 2024, 10:11

The Reynolds length L is used to compute the Reynolds number Re=rho * V * L / mu
So you choose it according to whatever is your characteristic length scale.
The units of the mesh are meters (SYSTEM_MEASUREMENTS=SI) or inches (SYSTEM_MEASUREMENTS=US)
If you want to change this, you have to scale your mesh in your mesher or with SU2_DEF

March 19, 2022, 07:22	Non-dimensional Mesh?	#1
ialqadi New Member ibraheem alqadi Join Date: Mar 2016 Posts: 1 Rep Power: 0	Hello, I was wondering if I need to nondimensionalize the mesh if I am running SU2 in nondimesional mode? Or does SU2 perform spatial nondimensionalization?

March 20, 2022, 01:57		#2
ShiheJia New Member Join Date: Feb 2020 Posts: 6 Rep Power: 6	Here is a manual for the non-dim issues: https://su2code.github.io/docs_v7/Physical-Definition/ The ref. value of length is 1 which means you can just use one mesh for both dim and non-dim mode. ialqadi likes this.

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February 1, 2024, 23:36		#3
Chao_975 New Member Join Date: Jan 2024 Posts: 1 Rep Power: 0	Dose the REYNOLDS_LENGTH in cfg file means the real length of 1 in the mesh file? For example, the REYNOLDS_LENGTH=1m represents the 1 in the mesh file is 1meter? the REYNOLDS_LENGTH=0.001m represents the 1 in the mesh file is 0.001 meter?

February 2, 2024, 10:11		#4
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 676 Rep Power: 21	The Reynolds length L is used to compute the Reynolds number Re=rho * V * L / mu So you choose it according to whatever is your characteristic length scale. The units of the mesh are meters (SYSTEM_MEASUREMENTS=SI) or inches (SYSTEM_MEASUREMENTS=US) If you want to change this, you have to scale your mesh in your mesher or with SU2_DEF