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[General] [Paraview] Non-zero heatflux across an adiabatic surface

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Old   March 5, 2020, 11:32
Question [Paraview] Non-zero heatflux across an adiabatic surface
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Jaime
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Hello everyone,


I'm new in this forum and using Paraview, also english is not my mother tongue, so thank everyone in advance for your patience.


I have a problem with an adiabatic wing simulated in SU2 which I'm post-processing in Paraview 5.7, but it tells me I have a non-zero heatflux along the surface.


This tutorial of SU2:
https://su2code.github.io/tutorials/Turbulent_ONERAM6/
is a similar case, with an adiabatic wall (in the config file, MARKER_HEATFLUX= ( WING, 0.0 )), and when I check heatflux along the surface in Paraview (surface_flow/Integrate Variables), it gives me -3614 (????).



What I'm doing wrong? I already tried ExtractSurface/Generate Surafe Normals and Gradient of Unstructured DataSet.

Could someone help me?
Thank you so much

Last edited by AlphaOrionis; March 5, 2020 at 12:56.
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Old   March 26, 2020, 07:28
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Did you manage to figure out what was wrong? I am a new user to SU2 and don't understand why this happens.
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Old   July 16, 2020, 02:08
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Alex Landsberg
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I am also interested to know if you resolved the issue.
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Old   July 16, 2020, 03:47
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Hi landsber, I did not exactly resolve the issue, but I did learn a few things (which you may already know!).

I found that the heat flux approaches zero as the convergence improves. It takes much longer for the heat flux to converge than the usual forces and moments.

I also found that the convergence of the heat flux was very sensitive to the quality of the boundary layer mesh. I used a structured mesh with a growth rate of 1.1 to get better results. Originally, I was using 1.2, but this did not allow my heat flux to converge well.

Another thing that I did not realise is that although my numbers look large, they were small compared to a case with ‘real’ heat flux. E.g. I also simulated my case with an isothermal wall, and in comparison the heat flux from the adiabatic wall solution looked very small.
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adiabatic surface, flux, heat, heatflux, paraview

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