Dynamical characteristics of wave-excited channel flow

Selvarajan, S and Ram, Vasanta V (1994) Dynamical characteristics of wave-excited channel flow. Sadhana, 19 (Part 3). pp. 349-360. ISSN 0256-2499

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Abstract

This paper is part of a study on the receptivity characteristics of the shear flow in a channel whose walls are subjected to a wave-like excitation. The small amplitude forced wavy wall motion is characterised by a wave number vector 21, 22 and a frequency owg. The basic flow in the problem is a superposition of the Poiseuille flow and a periodic component that corresponds to the wave excitation of the wall. The aim of the study is to examine the susceptibility of this flow to transition. The problem is approached through studying the stability characteristics of the basic flow with respect to small disturbances. The theoretical framework for this purpose is Floquet theory. The solution procedure for solving the eigenvalue problem is the spectral collocation method. Preliminary results showing the influence of the amplitude and the wave number of the wall excitation on the stability boundary of the flow are presented.

Item Type: Article
Uncontrolled Keywords: Dynamical characteristics;Wave-excited channel flow;Forced wavy wall motion;Stability characteristics;Spectral collocation method
Subjects: AERONAUTICS > Aerodynamics
Depositing User: Ms. Alphones Mary
Date Deposited: 09 Jul 2015 10:38
Last Modified: 01 Sep 2015 09:03
URI: http://nal-ir.nal.res.in/id/eprint/12215

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