von karman constant
 

hi, I'm working on a new model of turbulence and would like to change the von karman constant taking in account of the pressure gradient. Does anyone know what kind of DEFINE_macros in Fluent I can use to modify this constant, or the turbulent viscocity ? Is the macros C_P_G(c,t) a macros to define the pressure gradient ? thank you very much... seb