CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Pre-Processing (http://www.cfd-online.com/Forums/openfoam-pre-processing/)
-   -   does anyone know whats type "freeStream"? (http://www.cfd-online.com/Forums/openfoam-pre-processing/119304-does-anyone-know-whats-type-freestream.html)

immortality June 13, 2013 17:08

does anyone know whats type "freeStream"?
 
what does mean freeStream or freeStreamPressure type?whats the difference to zeroGradient?
Code:

{
    version    2.0;
    format      ascii;
    class      volScalarField;
    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField  uniform 0;

boundaryField
{
    inlet
    {
        type            freestreamPressure;
    }

    outlet
    {
        type            freestreamPressure;
    }


immortality June 21, 2013 12:17

I have found it in the solver's text.so its derived from inletOutlet.OK.but it has not mentioned that whats the difference between freeStream BC and inletOutletBC.
does anyone know about it?
Code:

Description
    This boundary condition provides a free-stream condition.  It is a 'mixed'
    condition derived from the \c inletOutlet condition, whereby the mode of
    operation switches between fixed (free stream) value and zero gradient
    based on the sign of the flux.



All times are GMT -4. The time now is 05:43.