Three-dimensional lattice Boltzmann simulations of droplet formation in a cross-junction microchannel

摘要: Abstract An immiscible liquid–liquid multiphase flow in a cross-junction microchannel was numerically studied by the lattice Boltzmann method. improved, BGK model proposed introducing interfacial tension force based on continuum surface (CSF) The recoloring step replaced anti-diffusion scheme mixed region to reduce side-effect and control thickness of interface. present method tested simulations static bubble Taylor deformation. Laplace’s law, spurious velocities, interface, pressure distribution small deformation theory were examined. It proves that our is more advantageous for simulation fluids over original model. droplet formation performed compared with experiments. numerical results show good agreements experimental ones evolution size at various inlet velocities. Besides, dimensionless analysis carried out. resulting sizes depend Capillary number great extent under current conditions.