why would you want to do that? They maybe other options to solve your problem as opposed to changing a BC to a wall but then again maybe not. You can always take the results at the end of a certian time and use them as the inital conditions for another simulation with a wall instead of a BC.
why would you want to do that? They maybe other options to solve your problem as opposed to changing a BC to a wall but then again maybe not. You can always take the results at the end of a certian time and use them as the inital conditions for another simulation with a wall instead of a BC.