Modelling for three dimensional coalescence of two bubbles

摘要: This paper is concerned with the three dimensional (3D) interaction and coalescence of two bubbles subject to buoyancy dynamics subsequent joined bubble using boundary integral method (BIM). An improved density potential implemented control mesh quality. It helps avoid numerical instabilities, which occur after coalescence. Numerical convergence tests are conducted in terms sizes time steps. The 3D model agrees well an axisymmetric BIM for cases as experimental results captured by high-speed camera. jetting, interaction, depend on maximum radii, centre distance between at inception, angle β line direction buoyancy. We investigate = 0, π/4, π/2, respectively, various distances inception. presented include jet shapes, velocity, pressure fields surrounding bubbles, histories volumes, velocities, positions centroid system.