Numerical simulation of ski-jump jet motion using lattice Boltzmann method

Based on the lattice Boltzmann method, a lattice Boltzmann (LB) model of the ski-jump jet two-phase flow is developed first and the corresponding boundary conditions are studied. A simple case study of a droplet horizontal movement calculation is carried out to test and verify the model, where level set method is used to track and reconstruct the moving droplet free surface. Then, we numerically simulate a two dimensional flow field of the ski-jump jet with the LB model, derive the moving surface and velocity vector field of the jet flow. The simulation results are very consistent with the physical mechanisms. The effectiveness and reliability of the model are demonstrated by the numerical examples.