Trying to interpolate deal.ii solution to a Cartesian grid

[Elyn Luo]

Hello,

I have a solution on an unstructured grid obtained by deal.ii in VTU format, and now I want to interpolate it to a cartesian grid for further processing in other softwares. It seems like Paraview can do the job, but I'm wondering if this can be done in deal.ii directly? Thank you!

Best,

Elyn

[Marco Feder]

Hi,

I've recently used the following function for a similar task: https://www.dealii.org/developer/doxygen/deal.II/classFunctions_1_1FEFieldFunction.html#ac25d965867c71d1139262cf383f9f593 (see in particular the first snippet). This works under the assumption that the cartesian grid is entirely included in the original one. 

Hope that helps,

Marco