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changing a boundary condition during simulation

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Old   May 17, 2012, 10:22
Default changing a boundary condition during simulation
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How do I change the boundary conditions at pre-set times during a simulation?

For example, during a 10 sec simulation I want to change a boundary from stagnation pressure to symmetry at 5 seconds to effectively act as a valve and close off that boundary halfway through the run.
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Old   May 17, 2012, 19:00
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Would another way to do this to use a baffle that completely closes off the void? Or perhaps use a boundary condition that can change with time?
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Old   May 18, 2012, 14:20
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The simplest way to do this is to run the simulation to 5 seconds with the stagnation pressure boundary, then do a restart simulation with the symmetry boundary for the last 5 seconds.
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