Reply To: add gravity leads to instability, bifurcation 3D, multiphase, particles
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thanks for the explanation. Thus, my implementation of gravity is correct. See you at the Spring School!
Now I have to find a way to make this simulation numerically stable. Any recommendations based on personal experience for boundaries? So far I made the experience that increasing the resolution N helps sometimes, but with the disadvantage that the computational time increases dramatically.
Boundaries for numerical stability would be interested for: (in brackets are the used values)
gravitational force in lattice units (0.0187673)
maximum velocity in lattice units (0.0505667)
maybe lattice viscosity
What are the steps you do, do make a LB simulation numerically stable.
Thanks a lot!
- This reply was modified 3 years, 11 months ago by Manuel Berger.