The Relationship between the Apparent Viscosity and the Void Fraction in Two-Phase Flow

Abstract

In this paper, the apparent viscosity which is one of the most important apparent mean physical properties in a two-phase flow, has been measured by a specially designed rotation viscometer. The experiment has been carried out using a small air bubbles-liquid tow-phase mixture. From the experimental results, the relationship between the specific viscosity η_sp and the void fraction φ has been expressed with an experimental formula involving the dimensionless number T_a, which shows the amount of the deformation of bubbles in shear flow.