Hi,
to calculate the gradient of a CellVariable one can use .getGrad or
.getFaceGrad.
For .getFaceGrad I have no problem, (it calculate the gradient between cell :
(phi[1]-phi[0]/x[1] -x[0]) and return a FaceVar ...but I don't understand
.getGrad. What it does?
As it compute the gradient the values should be more or less the same as
.getFaceGrad but its values are far wrong (+30%,+50%, + 100%).
I would like to use .getGrad as I need to compute a source term : q =
C*grad(V) and so I need q as CellVariable; but if I use .getFaceGrad for
computing the gradient I get a FaceVariable.
What can I do?
There is a way to transform a FaceVar into CellVar ?
Thanks.
Eduard
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