On 04/21/2017 08:21 AM, Lukas Korous wrote:
If you work in real space, then in 2d there are 2x3 basis functions
for the linear space (two vector components, each of which has the
form a+bx+cy), of which you can eliminate one because of the
divergence constraint, if I count correctly.
If you map from the reference cell, but require that div u = 0
pointwise in real space, then things may be more complicated.
Here I have no preference, whichever is an easier way to satisfy div u =
0 pointwise.
I suspect that that's going to be difficult to do for arbitrary cell
shapes if you define shape functions on the reference cell and map them.
Best
W.
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Wolfgang Bangerth email: [email protected]
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