STABILITY OF DENSITY STRATIFIED FLOW IN THE BOUNDARY LAYER

作     者：XIE Ming-liang LIN Jian-zhong XIE Ming-liang, LIN Jian-zhongState Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, ChinaChina Jiliang University, Hangzhou 310018, China

作者机构：State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China China Jiliang University Hangzhou 310018 China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2006年第18卷第5期

页      面：505-511页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant No: 10372090) 

主　　题：stability stratified flow boundary layer blasius flow 

摘      要：The stability of the laminar flat plate boundary layer is investigated numerically by solving the linear Orr-Sommerfeld equations for the disturbulence amplitude function. These equations include the terms of viscosity, density stratification, and diffusion. Neutral stability curve and the critical Re numbers are computed for various Richardson （Ri） numbers and Schmidt （Sc） numbers. The results show that the larger the Ri, the larger the critical Re for Sc 〈 10. The flow is stable for Ri 〈 0, when Sc is very small or the mass diffusion coefficient is very large. But for Ri 〉 0, the effects of diffusion are reversed for Sc 〈 10. For Sc 〉 10, the critical Re rapidly decreases to zero as the Sc increases for a given Ri number. The critical Re rapidly decreases as the Ri increases.