Hello. I am simulating transient multiphase flow. My inlet is time dependent but I can't use a table. STAR 3.26 doesn't give u this option so I have to use a subroutine. Can anyone tell me what to put into bcdefi.f? The only thing I want is y-velocity (V) increasing at a certain rate with TIME. Your help will be much appreciated

Then enter: v = A * time where A is your rate constant. The remaining parameters will default to the values set in the NavCenter.

do I have to determine the global variable TIME in the bcdefi subroutine? I tried what u said but the subroutine didn't work. thanks!

No.

The bcdefi.f template should have the line:

INCLUDE 'usrdat.inc'

When you run the code, star will put usrdat.inc in your ufile directory. The variable time is provided by a common block within usrdat.inc. Time gives the current simulation time.

Thanks!!!