[neilk]

Hello,

I am trying to apply mixed boundary condition for volScalarField H2O to simulate absorption based on partition coefficients at a wall. I am trying to apply the boundary condition attached in the image below.Capture.PNG

Inorder to implement this I used the following BC:

BOTTOM
    {
        type            groovyBC;
		value			uniform 1;
		variables	"Dmuc=4.3e-6;Dmem=1.4e-6;tmem=1e- 
                   4;kow=200;liq{BOTTOM}=T;";
		//variables	"Dmuc=1;Dmem=0.1;tmem=1e-4;kow=200;";
		valueExpression	"liq";
        gradientExpression "0";
        fractionExpression "1";
        evaluateDuringConstruction 1;

In the groovyBC above I tried to discretize the gradient of H2O as a result only depending on the patch internal cell field value. But it doesn't take that into account.

Is there a way to implement this type of groovyBC?

Thank you

Nilay