[Freeflow][test][angeli] No convergence against analytical solution for first time step
The solution does not properly converge for the first time step. The pressure solution is really weird for very small time steps (as the 10^(-12) that is currently used). It becomes less and less weird the larger the first time step is taken. But even for an initial time step of e.g. 10^(-2) the solution is an unsymmetrical version of what it is supposed to be.
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