Simulate with complex geometries and complex physics
%IDENT_free%
free surface BE (IDENT)
In LIQUID simulations, %IDENT_free% is usually used as IDENT identifier in the initial filling phase to specify the initial free surface. Points filled on this boundary will mark all its boundary points as free surface points. The ACTIVE flag should be set to be only active during the initial filling phase, i.e. use %ACTIVE_init%.
Note: In order to detect free surfaces, the parameter compute_FS must be set to 'YES' for the desired chamber.