This is a two-phase flow model in a microchannel.
The VOF model is chosen to simulate the flow of gas-liquid two-phase in a channel(d=3.2mm).The validity of the simulation parameters and model selection is verified under the conditions of previous experiments to simulate a similar gas-liquid flow pattern.The slug flow can be formed when the velocity ratio of gas and liquid is 1:1 or so,and the length of the gas and liquid slug increases with the increase of superficial velocity.
2D mesh was generated by ANSYS ICEM fluent.msh
model: Laminar
initial phase: all water
initial velocity field: uniform (0 0 0)
initial pressure field: 0
water inlet: uniform 1, -0.1m/s
air inlet: uniform 0, 0.1m/s
outlet: pressureInletOutletVelocity
wall surface: non-sliding
g = 9.81 (downward)
water: density = 998.2 viscosity = 1E-06
air: density = 1.225 viscosity = 1.48e-05
surface tension = 0.072
Grid transformation:
fluentMeshToFoam fluent.msh
Run:
interFoam
You can view this in the Result file.
COMSOL - Study of Two-Phase Microslug Formation in a Microchannel Cross Junction https://www.comsol.com/paper/study-of-two-phase-microslug-formation-in-a-microchannel-cross-junction-8081
COMSOL - Rising Bubble https://www.comsol.com/model/rising-bubble-177
COMSOL - Pore-Scale Modeling of Immiscible Two-Phase Flow in Predominantly 2D Microfluidic Porous Domains https://www.comsol.com/paper/pore-scale-modeling-of-immiscible-two-phase-flow-in-predominantly-2d-microfluidi-64571