CFD Online Discussion Forums - type extrapolatedPressure (0/p file )

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type extrapolatedPressure (0/p file )

this is a code from 0/p file (foam-extend) .. a tutorial from extend-bazaar...

Code:

dimensions      [0 2 -2 0 0 0 0];



internalField   uniform 0;



boundaryField

{

    

    outlet

    {

        type fixedValue;

        value uniform 0;

    }

    



inlet

    {

     type            groovyBC;

     variables "var=100/1050;";

     valueExpression "(var+(var*sin(pi*time())))"; //*normal();

    }

 



wall

    {

        type extrapolatedPressure;

        value uniform 0;

    }

What is the extrapolatedPressure?
what it says about the pressure on the wall?

Best Regards,
Spadeto