Does this remain the same/very similar for the “Gradient” filter? I have the option to generate a structured grid. With either method, do you know of a way to dictate how many elements along the surface normal-vector should be used for calculating the gradient at the wall/boundary?
With the unstructured method, I’m now looking at using the “Point Dataset Interpolator” filter to bring the gradients you discussed onto the surface. If I could sample along the normal, this might work as well. It appears that I can only choose from a radius or total amount of nearest-neighbors.