The Absolute and Convective Secondary Instabilities in the Conduction Regime  

作　　者：Jianjun TAO and Dachun YAN (Dept. of Mechanics & Engineering Sciences,Peking University, Beijing 100871, China) 

出　　处：《Communications in Nonlinear Science and Numerical Simulation》1999年第1期34-38,共5页非线性科学与数值模拟通讯（英文版）

摘　　要：Convective and absolute instabilities in the conduction regime of a vertical heated slot are investigated. It is found that in a large range of Prandtl number (0 < Pr < 2000) different instability mode has different characteristics: the stationary mode is absolute instability while the traveling wave mode is convective instability. When Pr > 12, a secondary instability appears with stationary mode, and it is proven that even at large Prandtl numbers the stationary mode still exists.Convective and absolute instabilities in the conduction regime of a vertical heated slot are investigated. It is found that in a large range of Prandtl number (0 < Pr < 2000) different instability mode has different characteristics: the stationary mode is absolute instability while the traveling wave mode is convective instability. When Pr > 12, a secondary instability appears with stationary mode, and it is proven that even at large Prandtl numbers the stationary mode still exists.

关 键 词：absolute instability convective instability conduction regime 

分 类 号：O551.3[理学—热学与物质分子运动论]