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probe wallShearStress

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Old   October 18, 2016, 10:51
Default probe wallShearStress
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baS
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Hi Foamers,

I want to calculate the friction velocity u* = sqrt(tau_w/rho) on several points on a plate with openFoam 4.x. For this reason I want to calculate the shear stress and the density at the wall.
The output should be in the "postProcess"-format (coordinate / value) and not in the time-Folder.

I tried the following functions so far:

1. rhoSimpleFoam -postProcess -func wallShearStress

-> calculates wallShearStress in the time folder and the min/max-Values in the postProcess-Folder. Do I need an extra wallShearStress-file for defining the probe-locations?

2.
rhoSimpleFoam -postProcess -func probes

with the "probes"-file:

type probes;
setFormat raw;
fields
(
wallShearStress
);

probeLocations(
( 0 0 0)
);

-> no files are written in postProcessing-Folder (but it works for fields(U,k))

Any solutions?

Thanks for your Help!
Sebastian
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Old   August 7, 2018, 15:25
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gu1
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Quote:
Originally Posted by baS View Post
Hi Foamers,

I want to calculate the friction velocity u* = sqrt(tau_w/rho) on several points on a plate with openFoam 4.x. For this reason I want to calculate the shear stress and the density at the wall.
The output should be in the "postProcess"-format (coordinate / value) and not in the time-Folder.

I tried the following functions so far:

1. rhoSimpleFoam -postProcess -func wallShearStress

-> calculates wallShearStress in the time folder and the min/max-Values in the postProcess-Folder. Do I need an extra wallShearStress-file for defining the probe-locations?

2.
rhoSimpleFoam -postProcess -func probes

with the "probes"-file:

type probes;
setFormat raw;
fields
(
wallShearStress
);

probeLocations(
( 0 0 0)
);

-> no files are written in postProcessing-Folder (but it works for fields(U,k))

Any solutions?

Thanks for your Help!
Sebastian
Did you find the solution? I need to monitor the wallShearStress in the wall throughout the simulation to contextualize the convergence of a turbulent case.
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