Measurement of Void Fraction in Gas-Liquid Two-Phase Flow by Using Magnetic Fluid

Abstract

Thispaperdescribesanewmeasuringtechniqueofvoidfractionusingmagnetic fluid.Theproposedmeasurement can be realized with simple devices. The present study consists of two appropriate experiments termed “static experiment” (“calibration test”) and “flow experiment” (“actual flow test”). In the present study, the experiments have been performed with fully diluted magnetic fluid for the purpose of applying to common two-phase flow situations such as air–water. Results of the experiments have concluded that the proposed measuring technique of voidfractioncanmeasurevoidfractioninair–watertwo-phase flowsituationsbyaddingasmallamountofmagnetic fluid to fluids of interest. The present method has promise for other fluids. Nomenclature A = area of cross section of pipe, m 2 B = magnetic flux density, T for tesla H = magnetic field, A=m for ampere=m H = magnitude of magnetic field, A=m j = volumetric flux, m=s k = Boltzmann constant, J=K M = magnetization, A=m