Hi there,
I have a 3D unstructured VTK file from fluid simulation, and I want to extract a physical boundary (e.g. shock front) from the data. The boundary can be defined with certain kind of math expressions, for example, then density jump/gradient larger than a threshold. However, it may be more complicated than this. For example, I may need a boundary defined by the topology of the magnetic field, i.e. the location of the end points of the fieldline that connects through a given cell. What is the proper way of doing this? Can I extract the information from that surface and do more analysis later on?
Thanks!