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-   -   simple question about calculated bc (http://www.cfd-online.com/Forums/openfoam/79157-simple-question-about-calculated-bc.html)

hyperion August 14, 2010 14:05

simple question about calculated bc
 
Hi there foamers - I have a simple question. I have seen that some tutorials specify a value for boundary conditions of type: calculated. For example a velocity field bc patch input might look like:
patch1
{
type calculated;
value uniform ( 0 0 1325);
}

Is it necessary to specify a value for this type of boundary condition? Does specifying a value change the simulation?

Also, it seems that for different boundary condition specifications I get different output fields. I have been using dsmcFOAM and have noticed that cases output different fields, and my only guess why is different bc specification.

Thanks for all the help.


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