Image Analysis of Free Rising Bubbly Flows around Objects

Abstract

A peculiar two-phase convection is generated when an object is inserted in a free rising bubbly flow. This paper is concerned with an experimental method to elucidate the bubble behavior around several types of the object based on flow visualization and image processing techniques. Experimental results show the following points; 1) area of single-phase region behind the object depends sensitively on the shape of the object, 2) when many objects are arranged, the single-phase region expands behind the most downstream object.