If you are using the standard or realizable
model or the standard
model, a user-defined function can be used to customize the turbulent
Prandtl numbers. This option will allow you to calculate
(depending on if you have enabled the
model) by using a UDF. You will also be able to
calculate the value of the energy Prandtl number (Pr
and the Prandtl number at the wall (Pr
12.10-5) in this way.
See the separate
for information about user-defined functions.
In the Viscous Model panel, under User-Defined Functions, select the appropriate user-defined function from the drop-down lists under Prandtl Numbers. Options include: TKE Prandtl Number, TDR Prandtl Number ( - models only), SDR Prandtl Number ( - model only), Energy Prandtl Number, and Wall Prandtl Number.