open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everyone,

I have sucessfully installed v8p4r0. I want to run a simulation in FV scheme with Turbulence Model 3 (k-e model). It gives me an error of
"WITH FINITE VOLUME
TURBULENCE MODEL NOT TAKEN INTO ACCOUNT".
The same .cas file used to run sucessfully in v8p2.

I tried to check in examples of Telemac2d if any FV scheme is with Turbulence model 3. But all are in turbulence model 1.
In the code init_fv.f there is :

IF (ITURB.GE.2) THEN
WRITE(LU,*) 'WITH FINITE VOLUME'
WRITE(LU,*) 'TURBULENCE MODEL NOT TAKEN INTO ACCOUNT'
CALL PLANTE(1)
STOP
ENDIF

Do we have to use only Turbulence model 1 for Finite volume scheme?

Kind regards
Sandip

Hello Sandip,

Only TURBULENCE MODEL = 1 is possible with Finite Volumes schemes. Other choices are not available, that is why you can find the line you have quoted with the condition ITURB.GE.2

In release v8p2, I do not know exactly what is done but for sure, you do not have the combo Finite Volumes + k-epsilon model.

Hope this helps,

Chi-Tuan

Hi Chi-Tuan,

I used Turbulence model 4 in previous version and now wanted to try other Turbulence model. Can I know the reason why FV scheme doesn't work with Turbulence model 4 in new version.

Kind regards
Sandip

Hello,

The choice to a turbulence model with Finite Volumes other than constant viscosity is not allowed because the array of viscosity variable in space is not filled in when using Finite Volumes (nobody works for this feature at the moment).

Before, it was not filled as well and the computation may have ended but the turbulence model itself was not taken into account for the hydrodynamic part. Your previous result should not really take into account the turbulence you thought you used. I would suggest you to forget previous results with Finite Volumes in TELEMAC-2D using another turbulence model different from constant viscosity.

Chi-Tuan