[federicabi]

Hello everyone!

I'm new in this forum and I'm new to openFOAM. I'm trying to simulate a ship entering the water with a 3D interDyMFoam model and I need to calculate the pressure, velocity and alpha fields on specific sections of the ship so that I can compare them with 2D calculations.

My question is how to create patches on the hull surface, like slices of it, without changing the STL file, to put into surface function in my controldict.

Thanks in advance!!

[Artur]

Hi,

You could play with the topoSet utility. First create a set from the hull faces with something like patchToFace, then subset it to faces within a given box (corresponding to the extent of the slice you want), something like subset from boxToFace, and then create patches from the sets with createPatch (not sure how well the last step will work and what will happen with the original patch).

Hopefully these will give you some pointers to get started. Obviously I don't have a file which does exactly what you want but attached one of my topoSet dictionaries to show you how it looks like.

All the best,

A