Hi, all
I have seen the problem "H2 conforming finite elements in deal.II ":
I want to use deal.II for the simulation of the Cahn-Hilliard equation
<math> \frac{\partial u}{\partial t} - \beta \Delta \Psi (u) +
\alpha \Delta^2 u = 0,</math>
where Psi is a nonlinear function in u (derived from the so-called bulk
energy). In order to approximate the fourth derivative, I either need an
H^2 conforming finite element or a DG element that is H^1. Is there any
such element implemented in the libraries of deal.II?
But there seems not have an answer to it. why? and can anyone
give the answer to it?
thanks in advance!
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