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Two Fluid bouyant problem and meshI'm trying to simulate a problem of two layered fluids of different densities, such as Rayleigh-Taylor instability or double diffusive
My system consist in two layered fluids of different densities. (At first, without using scalar quantities with different diffusion coefficient, but I include it in the future) When I want to simulate the Rayleigh-Taylor instability, noticed that the result varies with the number of cells that use. I tried to refine, but the result is always different. My system is simple, just a rectangle defined between (-1, 1) for x coordinate, and (-3, 3) for y. The first fluid is defined between (-3, 0) and the second between (0, 3). My question is, How I can I know the proper size of cells so that the result is correct? Maybe any problem with the boundary conditions? For this problem I use a inviscid flows and boundary conditions are continuity system for the coordinates, and wall to the x coordinate Please any help is welcome THANKS |

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