I have a simple model that is used to run various thermal simulations for a research. For some reason, after a simulation is run, strange lines/marks appear on the model, and I have absolutely no idea why. Basically, on the outer edges of the model, lines appear that "connect" the bumps. Pictures before and after the simulation are attached (the second is a close-up of the lines that appear). It is a fairly basic simulation otherwise - two different heat power loads and convection...all taking place at room temperature. If anyone knows how to fix this issue, I would really appreciate it!