Innovative Techniques For Two-Phase Flow Measurements
Wael H. Ahmed* and Basel I. Ismail**
*Component Life Technology, Atomic Energy of Canada Ltd., Canada, **Department of Mechanical Engineering,
Lakehead University, Canada
Received: November 5, 2007; Accepted: November 27, 2007; Revised: November 30, 2007
Abstract: Two-phase flow is important in an increasing number of applications and industries. For example, the safety
analysis codes for the nuclear energy industry require closure relations for the vapor-liquid interfacial transfer terms,
while accurate two-phase pressure drop models are necessary to design the piping systems in the oil and gas industry.
Also, two-phase flow occurs in heat exchangers, steam generators, chemical reactors, oil transportation and many other
process equipments. In addition, development of accurate and suitable instrumentations for on-line monitoring and
measurement of the solids concentration and velocity in gas-solid two-phase flows has proven to be a challenging problem
with many scientists and engineers worldwide developing novel techniques for this application. This paper presents a
review on the electrical-based measurement techniques for gas-solid and gas-liquid two-phase flows along with the most
recent patents developed for two-phase flow measurements. Also, development of a novel method for the design of
capacitance sensors for void fraction measurement and flow pattern identification was presented in detail.
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