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《中国化学工程学报(英文版)》 2008-02
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Prediction of Pressure Gradient and Holdup in Small Etvs Number Liquid-Liquid Segregated Flow

LIU Yiping , ZHANG Hua, WANG Shuhua and WANG Jing Institute of Engineering Thermo-Physics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China  
The segregated flow pattern, which occurs in a 26.1 mm diameter, horizontal, stainless steel test section, is investigated. Pressure gradient and in situ phase distribution data were obtained for different combinations of phase superficial velocities ranging from 0.05 m·s-1 to 0.96 m·s-1. For the current small E?tv?s number liquid-liquid system (EoD=4.77), the dominant effect of interfacial tension and wall-wetting properties of the liquids over the gravity is considered. The approach introduces the closure relationship for the case of turbulent flow in a rough pipe, and attempts to modify the two-fluid model to account for the curved interface. In present flow rates range, wave amplitudes were found small, while interfacial mixing was observed. An adjustable definition for hydraulic diame- ters of two fluids and interfacial friction factor is adopted. The predicted pressure gradient and in situ phase distri- bution data have been compared with present experimental data and those reported in the literature.
【Fund】: the National High Technology Research and Development Program of China (2006AA09Z333)
【CateGory Index】: TQ021.1
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1 LIU Wenhong( GUO Liejin(, WU Tiejun( ) and ZHANG Ximin( State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;An Experimental Study on the Flow Characteristics of OilWater Two-Phase Flow in Horizontal Straight Pipes[J];中国化学工程学报(英文版);2003-05
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