Peter Yip

Another question: 

3. How would I go about the mesh refining process to get a grid converged solution? I thought that I would first run the simulations with refining the particle until the solution is unchanging and then refine the target until the solution is unchanging, but I have read in many resources that it is recommended to keep the elements that are coupled (or in contact) to have relativley the same element size? Should I just do the original sequence of grid convergence stated above or is another method recommended to insure grid dependence is removed?