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Old   May 19, 2003, 11:32
Default boundary condition
BROSSE Etienne
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I have a question about boundary condition. The question is how define a patch which can be used as inflow or outflow condition by knowing that I don't know the various values of pressures, speed, etc (because they are given to me by a exterior's program and can change each step of times)

Currently I have done two patches, one for inflow and the other for outflow. Can I activate ones and desactivate other one, with some instructions which are in the grnd.f file ?
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Old   May 21, 2003, 07:32
Default Re: boundary condition
cham support
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A single patch could be used with CM=GRND VM=GRND for P1 and likewise VAL=GRND for the various solved variables. The required values of CM, VM and VAL could then be coded in Group 13 of GROUND as a function of time.

If you want to deactivate any patches at particular times, then set the necessary coefficients and values to zero in ground.
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