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Restoring the missing vorticity in advection-projection fluid solvers
2015
ACM Transactions on Graphics
Most visual effects fluid solvers use a time-splitting approach where velocity is first advected in the flow, then projected to be incompressible with pressure. Even if a highly accurate advection scheme is used, the self-advection step typically transfers some kinetic energy from divergence-free modes into divergent modes, which are then projected out by pressure, losing energy noticeably for large time steps. Instead of taking smaller time steps or using significantly more complex time
doi:10.1145/2766982
fatcat:fvalpnjtlzfgrdhdxtxiblr7v4