WITHDRAWN: Gas–liquid two-phase flow in serpentine microchannel with different wall properties

Gas–liquid flow in serpentine micro channel with different surface properties exhibits drastically different flow behavior. With water and air as working fluids, the method of numerical simulation analysis is based on CLSVOF (coupled level set and volume of fluid method) multiphase model. After verifying the reasonability of the model through experiment, by changing wall properties and Re number, influences of contact angle and surface roughness on flow regime and Po number were discussed. Meanwhile, we compared gas–liquid two-phase flow pattern in serpentine microchannel with a combination of different number of hydrophobic and hydrophilic wall surfaces under several typical flow conditions, and in-depth analyzed the influence of curved channel on gas liquid phase distribution and interfacial fluctuation. Beyond that, the combined effect of curve channel and wall properties on flow resistance was analyzed. This paper finds that wall properties have great influence on gas–liquid flow in micro channels not only on flow regime but also flow characteristics. It is more beneficial for fluid flowing when the straight part of micro channel is hydrophilic smooth wall, and curve part is hydrophobic wall with larger roughness.