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Multi phase VOF-PLIC Jetsam Flotsam

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Old   August 31, 2016, 19:05
Default Multi phase VOF-PLIC Jetsam Flotsam
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Yous van Halder
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I am currently busy writing a VOF-PLIC code for a dambreak problem. I use a VOF PLIC method, but I still have some issues (see the attached picture). The PLIC method uses Youngs finite differencing for approximating the unit normal (so no ELVIRA or Least Squares). I use a split advection scheme (explicit-explicit) and I also tried an unsplit langangian advection (also didn't do the job). I discretised the Navier Stokes equations using a simple first order time integration and central differencing for the spatial discretisation on a staggered grid. This is on a 128x128 grid, a timestep of dt = 0.0001, a density ratio of 1/2 (rho1 = 1 and rho2 = 2) and no surface tension. I encounter some strange pieces of fluid outside the red phase after the several timesteps. Can someone help me to solve this problem?

Gr Yous
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Old   March 26, 2018, 12:13
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Did you ever have any success in resolving this issue? I'm also writing a code using the same structure as what you described and am also generating this flotsam.
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multi phase, multi phase flow, vof method

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