Absolute instabilities in two-layer gravitiy driven film flow with a free surface

被引：0

作者：

P. Plaschko

U. Schaflinger

机构：

[1] Depto. Física,

[2] Universidad Autónoma Metropolitana,undefined

[3] Iztapalapa,undefined

[4] Mexico D. F.,undefined

[5] Mexico,undefined

[6] (Fax: 525 724 4611),undefined

[7] Institute of Fluid Dynamics and Heat Transfer,undefined

[8] Technische Universität Wien,undefined

[9] Vienna,undefined

[10] Austria,undefined

[11] e-mail: Uwe.Schaflinger@tuwien.ac.at,undefined

来源：

Zeitschrift für angewandte Mathematik und Physik ZAMP | 1998年 / 49卷

关键词：

Key words. Linear stability, hydrodynamic stability, stratified flow.;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We investigate on the basis of a linear analysis the stability of a gravity driven laminar, stratified film flow of two superposed fluids which are a clear liquid and a suspension of solid particles below. The study is based on the assumption that the concentration remains constant within the suspension layer. This assumption is justified because of the base-state results for shear induced resuspension for even moderate flow-rates. The numerical solutions display the existence of two different instabilities: waves at the free surface and interfacial waves. Here we concentrate on the latter instabilities and show that such a gravity driven two-layer film flow with a free surface is absolutely unstable.

引用

页码：194 / 204

页数：10

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