Reconstruction of a three-dimensional bubble surface from high-speed orthogonal imaging of dilute bubbly flow

Abstract

This paper presents image analysis algorithms to reconstruct a three-dimensional gas bubble surface from the time series of two orthogonal projections and to also recognize bubble outlines when the bubbles are partly overlapping in the image. Overlapping bubble images raise a large problem for three-dimensional, tomographic imaging of bubbly flows. Here, a novel approach to recognize the outlines of irregularly-shaped, overlapping bubbles based on the overlapping object recognition algorithm is presented.