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Pressure boundary conditions for a walled domain

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Old   March 21, 2012, 01:40
Default Pressure boundary conditions for a walled domain
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Jeff Cumpston
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Hi there,

For a computational domain with the outside boundary of type 'wall', what is the difference between specifying the pressure boundary conditions as 'zeroGradient' and specifying it as 'calculated; value $internalfield' (the latter is as found in the hotRoom tutorial for buoyantBoussinesqPimpleFoam solver)? Wouldn't the 'calculated' value just be the value for the pressure that was calculated for the cells adjacent to the wall, vis a vis zeroGradient?

Thanks for your time!

Jeff
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