On 05/23/2018 10:39 PM, 'Maxi Miller' via deal.II User Group wrote:
So, you would suggest simply adding the prefactors, after I then can keep my
problem in 2d?
Yes.
When starting with the laplacian in cylinder coordinates
\int\frac{1}{r}\partial_r\left(r\partial_r U\right)\phi r dr dz =
\int\partial_r\left(r\partial_r U\right)\phi dr dz = -\int\left(r\partial_r
U\right)\partial_r\phi dr dz
which is exactly the same as if I calculate the laplacian in cartesian
coordinates, except the factor r. Is that correct?
Yes.
W.
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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