How to switch off convection in a transport equation for an additional variable (pure diffusive transport, No Convection Keyword of CFX-4)?
This can be done with the following steps:
1. Define a standard transport equation in CFX-Pre and write definition file.
2. Change the type of transport equation to "Diffusive Transport Equation" in the CCL Editor
extract CCL form Definition/Res File with the command
cfx5cmds -def name.def -read -text name.ccl
and change the following object in name.ccl:
ADDITIONAL VARIABLE: Additional Variable 1
Kinematic Diffusivity = 1.0E-6 [m^2 s^-1]
Option = Diffusive Transport Equation
Save these settings with cfx5cmds -def name.def -write -text name.ccl