Study on the mass and heat transfer of gas-liquid two-phase flow in the porous media based on the 3D reconstruction model

Abstract

In the study, carbon fiber as porous medium, polycarbosilane-xylene solution and air as fluid, the heat and mass transfer in porous media was investigated. CT images of micro pores were obtained by applying Micro-CT technology. Based on the reconstruction model, 3D structure reconstruction was carried out. The surface tension model and contact angle model were introduced to establish the CFD model for simulation, which was verified by experiments. The effects of feed pressure P and liquid viscosity μ on the mass and heat transfer were systematically studied. It was found that under different P, the liquid holdup α, average temperature T and heat Q absorbed by liquid phase increase with time until stable. The larger the P, the smaller the stable values of T and Q. When μ was larger, the breakthrough time was longer, and the time for T and Q to reach stable values was longer.