Optimized Free Surface Fluids on Adaptive Grids with the Lattice Boltzmann Method

Nils Thürey and U. Rüde: The algorithm used to simulate the free surface fluid is based on the Lattice Boltzmann Method (LBM). The free surface tracking is similar to Volume-of-Fluid methods for conventional Navier-Stokes solvers. For the free surface three types of cells are distinguished - fluid cells that are treated with the normal LBM, empty cells, that do not require any computations, and interface cells. For these the amount of fluid mass is tracked for each time step, together with appropriate boundary conditions for the fluid gas interface. The algorithm is described in more detail in e.g. [Thuerey 2003]. To speed up the simulations we use a modied version of the grid-refinement described in [Filippova and Haenel 1998] together with a method to adapt the grid boundaries according to the free surface movement.

Category:

Science & Technology

Tags:

• Optimized
• Free
• Surface
• Fluids
• on
• Adaptive
• Grids
• with
• the
• Lattice
• Boltzmann
• Method