boundaryConditions generated for growing mesh on a displacement solid mechanics solver

Given two .stl surfaces alligned and concentric we need to find the normal vectors from the small surface to the big surface

Surface info is handled by pyvista.

Requirements

pip install pyvista
pip install numpy

Change the filenames on:

meshBigFile = 'BC/E13_outer.stl'
meshSmallFile = 'BC/E15_outer.stl'