Velocity and pressure can't be showed in paraview.

[jiangzhangze]

I computed a flow around cylinder as https://github.com/jorgensd/dolfinx-tutorial/blob/v0.4.0/chapter2/ns_code2.ipynb.The info showed the the computation have completed and I can find the xdmf file in the folder:
.
But mesh is showed only in paraview without p and v:

[jorgensd]

You need to use the ExtractBlock filter to get either variable.

[jiangzhangze]

Hi @jorgensd :
I add an ExtractBlock as https://jorgensd.github.io/dolfinx-tutorial/chapter1/membrane_paraview.html?highlight=paraview,but I can't find the p：

In addition,in most of time steps, the velocity of computaion domain can't perform as expcted especially after 4900 step（total is 12800）：




Are there any suggestions?

[jorgensd]

but I can't find the p：

You need to extract the other block to get p.

[jorgensd]

For the second bit, I would suggest moving to the 0.5.1 release of the code, as I changed to splitting scheme to improve the stability of the problem:
#99