Gas-liquid slip ratio and MHD pressure drop in two-phase liquid metal flow in strong magnetic field

Abstract

The gas-liquid slip ratio and the MHD pressure drop in the two-phase liquid metal flow under a strong magnetic field are treated in relation to the distributions of the gaseous phase and the fluid velocity. From NaK-N2 two-phase experiments, it is found that: (1) The ratio of the two-phase MHD pressure drop to that of the homogeneous non-slip two-phase flow model is independent of the applied magnetic field strength and the channel geometry (ratio of wall thickness to channel width) and is presented as a function of the ratio of the gas-liquid volumetric flow rate. (2) The void distribution is affected by the applied magnetic field. The gas bubbles may be pushed away towards the both side walls due to the pinch effect, resulting in the increase of the ratio of the mean void fraction to the one at the channel center with the increasing applied magnetic field. (3) The gas-liquid slip ratio is not directly dependent on the applied magnetic field strength and the channel geometry and is presented as a function of the ratio of the gas-liquid volumetric flow rate. As a result, the slip ratio decreases with the increasing system pressure and/or the decreasing mixture quality. © 1978 Taylor & Francis Group, LLC.