This paper proposes a novel method to simulate the flow of the fluids passing through the boundary, which has not been studied in the previous works. The proposed method requires no significant modification of the existing simulation techniques. Instead, it extends the common fluid simulation techniques by adding two post-steps, adjustment and projection. Therefore, the proposed method can be easily integrated with existing techniques. Specifically, the method extends the staggered Marker-and-Cell scheme, semi-Lagrangian advection, level set method, fast marching method, etc. With the extensions, the method can successfully produce the realistic behavior of the leaking fluids.
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