Abstract
A two-phase liquid slug flow in rectangular microchannel with T-junction was investigated using a computational fluid dynamics method based on lattice-Boltzmann model plus revised Allen-Cahn equation with diffuse-interface advection. The volumetric flow rate ratio was fixed at 1.0 within low Reynolds and capillary numbers for a silicone oil-water system with hydraulic diameter of 100 |xm, interfacial tension of 41.6 mN/m and kinematic viscosity of 1.0 cSt. The following findings were obtained: (1) The continuous and dispersed-phase slug droplets became shorter at nearly-constant length difference between them as their flow rates were increased; (2) The slug lengths agreed with experimental data; (3) The dispersedphase volume fraction was well predicted in comparison with experimental and two-fluid model simulation results.
