[vitto]

Originally Posted by shubhamkv1

I am using coded fvModel for this.

You must create a loop inside your code to assign the source in the the cells even using selectionMode cellZone:




volScalarField myField
(
IOobject
(
"myField",
"0",
mesh(),
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
mesh()
);


const labelList& myCells = mesh().cellZones()["myZone"];


then

forAll(myCell, i)
{
myField[myCell[i]] = 1;

}

scalarField& mySource = eqn.source();
mySource += myField;

[shubhamkv1]

Thank you for your prompt responses.
The absence of a loop in my implementation is a major issue. I presumed that specifying the "cellZone" within the "selectionMode" parameter would inherently apply the source term to the designated zone.
Thanks once again