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Analytic Formalism of 3-D Unstable Linear Wave Packets.

Brevdo, L. (1990) Analytic Formalism of 3-D Unstable Linear Wave Packets. Wissenschaftliche Jahrestagung der GAMM, April 1990, Hannover.

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Abstract

The analytic formalism for studying absolute and convective instabilities and spatially amplifying waves in 3-D flows of general nature is developed. The criterion by which a point (k, l, omega) in the wave number-frequency space contributes to the instability is fomulated in terms of the dispersion relation function D (k, l, omega) of the problem. Consequently, the causality condition for spatially amplifying waves is obtained. A procedure for finding a direction of maximal spatial amplification is presented. Application of the technique to computing the N-factor in the e exponent N method is discussed.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1990,
Title:Analytic Formalism of 3-D Unstable Linear Wave Packets.
Authors:
AuthorsInstitution or Email of Authors
Brevdo, L.UNSPECIFIED
Date:1990
Status:Published
Keywords:Instability, Wave, Amplification
Event Title:Wissenschaftliche Jahrestagung der GAMM, April 1990, Hannover
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Theoretische Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:34

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