[spalartallmaras]

Hello,

I would like to use the boundary condition turbulentDFSEMInlet (simulation is pimpleFoam),

but I dont know how the tutorial turbulent channel flow

(https://www.openfoam.com/documentati...nnel-flow.html)

generated the files point, U, R, L.

Has anyone idea for that?

[mAlletto]

Sample the fields at a plane and convert the results to a format desired with a bash or python script. L can be calculated from k and epsilon or k and omega.

[spalartallmaras]

Originally Posted by mAlletto

Sample the fields at a plane and convert the results to a format desired with a bash or python script. L can be calculated from k and epsilon or k and omega.

Thank you for your answer. Do you mean the plane the inlet?

[spalartallmaras]

After k-epsilon simulation with simpleFoam I got points, U, R, L at inlet.

But if I want to do decomposePar, there is a problem in R-file.

Reynolds stress (3.36378 0.0834591 -2.99156 4.1052 -1.26132 6.56265) at face 0
leads to an invalid Cholesky decomposition due to the constraint 
R_zz - sqr(a_xz) - sqr(a_yz) >= 0

Has anyone experience about this error?

[Jason_Duguay]

Hello,


I ran into the same error. Just wondering if you made any progress?

[mAlletto]

I think the data should be sampled at the outlet where the flow is fully developed

[binayak]

Originally Posted by spalartallmaras

After k-epsilon simulation with simpleFoam I got points, U, R, L at inlet.

But if I want to do decomposePar, there is a problem in R-file.

Reynolds stress (3.36378 0.0834591 -2.99156 4.1052 -1.26132 6.56265) at face 0
leads to an invalid Cholesky decomposition due to the constraint 
R_zz - sqr(a_xz) - sqr(a_yz) >= 0

Has anyone experience about this error?

I have got the same error. what is the possible solution?