This one is adapted from a book and serve here as an example. It does not have to be with the exact same boundary curves because I will only use it to present some terms (like the ones we see on the picture). The context: it represents two domains: a solid and a fluid with different spatial discretizations, i.e., two spatial meshes or grids, in this case a triangular mesh (in my field, we call it an 'unstructured' mesh). My main question is: is it possible to automatically generate this unstructured mesh using Tikz (or any other LaTeX package) for an arbitrary boundary?
Many thanks in advance :)