An efficient multiple marker front-capturing method for two-phase flows

The efficiency of the CLSVOF method of Coyajee and Boersma [1] is improved to accommodate the simulation of a large number, O(102–103)O(102–103), of droplets dispersed in a turbulent carrier fluid. Firstly, the implementation of a local multiple marker method removes the strong increase in computational time with the number of droplets. Secondly, the deflation method [2] is used as a second-level preconditioner in the pressure solver to reduce the number of iterations. Finally, three-dimensional domain decompositioning is used instead of a one-dimensional one. For the buoyant rise of 48 droplets in a periodic box an overall speed-up by a factor eight is achieved.

► An efficient multiple marker CLSVOF method is proposed.
► The use of a local multiple marker method improves load balancing.
► The deflation method reduces time spend in the Poisson solver.
► The method is capable of simulating systems with a large number of droplets.