Felix,
The first one is :
Is it possible to integrate source terms to make them easier to calculate ?
Yes. But you have to pay attention to the fact that you get boundary
integrals. You also have to think about whether your source term is
continuously differentiable and in which sense you integrate by parts (e.g.,
cell-by-cell or for the whole domain).
The second one is : do test function also have to respect the
incompressibility equation ?
You mean in an equation like the Stokes equations? No, you are enforcing
incompressibility through the equation
div u = 0
but you have no corresponding equation for the test functions.
I have two variables that verifies an incompressibility equation :
Then, during my calculation of the weak part, I use a test function written
And I have termes in and that appears in my weak form. Can I write to simplify
my weak formulation ?
Nope :-)
Best
W.
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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