Conditional reading of field
 

I would like to add a body force to a solver, but not allways. Is there a way to say OpenFOAM to read the field BF only when the file is there? And to set BF=0 otherwise?

I know only:

Hello,

have a look on this one, maybe it helps

http://www.cfd-online.com/Forums/ope...revisited.html