[baS]

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

[gu1]

Originally Posted by baS

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.