Two-phase flow patterns in a square mini-channel

Abstract

This paper presents a new set of experimental data of air-water flow patterns in a channel with a cross-section of lxl mm 2. The ranges of the gas and liquid superficial velocities are 0.1~10 m/s and 0.2~7 m/s, respectively.Bubble, bubble-slug, slug, and frothy flows are observed. The present data are compared with other data in minichannels reported in literature, and also compared with those in normal channel at microgravity, in which the Bond number has the same order of magnitude. The slug-frothy boundary is in consistent with each other, but for the bubble-slug transition, a much smaller value for the transition quality in the drift-flux model is obtained in the present study than those predicted by the empirical relations for the case of microgravity. It's shown that the mini-scale modeling may not be an effective way to anticipate the bubble-slug transition of two-phase flow at microgravity.

Critical Review on Internal and External Battery Thermal Management Systems for Fast Charging Applications

“…Zhao et al. [ 214 ] analyzed the performance of a PCM‐based BTMS coupled with a heat sink for LIBs by varying the system configurations, i.e., the distribution of the PCM, heat sink, and air flow. Four PCMs were used in different orders based on the latent heat and melting temperature.…”