CFD Online Discussion Forums

CFD Online Discussion Forums (
-   CFX (
-   -   Use of 1 equation turbulence model in CFX 4.3 (

Niels Deen July 19, 2000 08:50

Use of 1 equation turbulence model in CFX 4.3

I would like to implement an one-equation eddy viscosity model in CFX 4.3. That is, I want to perform a large eddy simulation, in which the eddy viscosity is approximated with the use of a transport equation for k (turbulent kinetic energy). The eddy viscosity becomes:

mu<SUB>T</SUB> = rho C<SUB>s</SUB> k<SUP>0.5</SUP> delta

where C<SUB>s</SUB> is a model constant (=0.12) and delta is the filter size (i.e. representative size of the gridcell).

Unfortunately in CFX one can only pick a turbulence model with 2 equations or more (like k-epsilon, k-omega or RSM).

My experience with the use of User Fortran in differential equations is zero. Can anyone help me on this? Thanks alot! Kind regards,

Niels Deen

All times are GMT -4. The time now is 08:10.