I am not able to define two different fluids for a counter flow heat exchanger. Infact when I define fluid A for one channel and fluid B for another channel in the same domain fluid A gets replaced by latest defined fluid B. If anybody solved such problem having two different fluids not mixing with each other (please mind it is not multicomponent or multiphase problem.It is simple single ph problem having two fluids)

Set the environment variable: CFX5_NO_CONSTANT_PHYSICS = T before starting CFX-Pre. Then define a seperate domain for each of the two fluid regions - each will be allowed to have a different fluid. Mike

Thaks Mike for valuable suggestion Regards Ram Dayal

Having the following erro message,what should we do?

Error in subroutine FNDVAR : Error finding variable DENSITY_FL1 GETVAR originally called by subroutine GET_MFLOIP_ZIF