Prediction Method of Flow Patterns in Gas-liquid Two-Phase Flow

Abstract

A quantitative indication method of gas-liquid interface structure and its transient property in an existing two-phase flow was investigated with the object of predicting flow patterns. The relation between flow pattern and statistical property of local void fraction fructuation was discussed. The first moment distribution function of local transit length was chosen as the indication function, and it was shown reasonable to plot the function on a logarithmic probability graph paper. In a broad experimental range of vertical flows with continuous liquidphase, some kinds of indication curves were obtained : a single straight line or a simple refracting curve consisting of two or three straight lines. The information obtained by this method and the relation between the curve and flow pattern were shown. It was demonstrated that the method was useful to indicate, compare an predict the flow pattern.