Prediction of Pressure Gradient and Holdup in Small Eoetvoes Number Liquid-Liquid Segregated Flow  

作　　者：刘夷平 张华 王淑华 王经 

机构地区：[1]Institute of Engineering Thermo-Physics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Chinese Journal of Chemical Engineering》2008年第2期184-191,共8页中国化学工程学报（英文版）

基　　金：the National High Technology Research and Development Program of China (2006AA09Z333)

摘　　要：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 Eoetvoes 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 m 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 distribution data have been compared with present experimental data and those reported in the literature.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.

关 键 词：two-fluid model pressure gradient HOLDUP liquid-liquid flow interfacial shear 

分 类 号：O6[理学—化学]