A mathematical model and numerical simulation of pressure wave in horizontal gas-liquid bubbly flow

作     者：HUANG Fei, BAI Bofeng and GUO Liejin(State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China) 

作者机构：StateKeyLaboratoryofMultiphaseFlowinPowerEngineeringXi＇anJiaotongUniversityXi＇an710049China 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2004年第4期

页      面：58-63页

学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 50006010 and 59995462) 

主　　题：pressure wave two-fluid model gas-liquid bubbly flow dispersion speed attenuation. 

摘      要：By using an ensemble-averaged two-fluid model, with valid closure conditions of interfacial momentum exchange due to virtual mass force, viscous shear stress and drag force, a model for pressure wave propagation in a horizontal gas-liquid bubbly flow is proposed. According to the small perturbation theory and solvable condition of one-order linear uniform equations, a dispersion equation of pressure wave is induced. The pressure wave speed calculated from the model is compared and in good agreement with existing data. According to the dispersion equation, the propagation and attenuation of pressure wave are investigated systemically. The factors affecting pressure wave, such as void fraction, pressure, wall shear stress, perturbation frequency, virtual mass force and drag force, are analyzed. The result shows that the decrease in system pressure, the increase in void fraction and the existence of wall shear stress, will cause a decrease in pressure wave speed and an increase in the attenuation coefficie