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Longitudinal vortices in a laminar natural convection boundary layer flow on an inclined flat plate and their influence on heat transfer

Jeschke, P. and Beer, Hans (2001):
Longitudinal vortices in a laminar natural convection boundary layer flow on an inclined flat plate and their influence on heat transfer.
In: Journal of Fluid Mechanics, 432, pp. 313-339. ISSN 1469-7645,
[Article]

Abstract

The linear and nonlinear growth of longitudinal vortices in a laminar boundary layer and the development of secondary instabilities are investigated theoretically and by experiment. As a prototype problem the natural convection flow along a constant-heat-flux inclined flat plate in water is chosen. Based upon the smallness of the plate's angle of inclination from the vertical, the largeness of the Grashof number, and the smallness of the vortex strength, a perturbation method is used to derive and solve a consistent set of governing equations for the linear, weakly nonlinear and the strongly nonlinear regimes which is asymptotically correct to first order. Liquid-crystal thermography based on wide-band liquid crystals is used to provide full-field, highly accurate wall temperature measurements and visualizations.

Item Type: Article
Erschienen: 2001
Creators: Jeschke, P. and Beer, Hans
Title: Longitudinal vortices in a laminar natural convection boundary layer flow on an inclined flat plate and their influence on heat transfer
Language: English
Abstract:

The linear and nonlinear growth of longitudinal vortices in a laminar boundary layer and the development of secondary instabilities are investigated theoretically and by experiment. As a prototype problem the natural convection flow along a constant-heat-flux inclined flat plate in water is chosen. Based upon the smallness of the plate's angle of inclination from the vertical, the largeness of the Grashof number, and the smallness of the vortex strength, a perturbation method is used to derive and solve a consistent set of governing equations for the linear, weakly nonlinear and the strongly nonlinear regimes which is asymptotically correct to first order. Liquid-crystal thermography based on wide-band liquid crystals is used to provide full-field, highly accurate wall temperature measurements and visualizations.

Journal or Publication Title: Journal of Fluid Mechanics
Journal volume: 432
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Date Deposited: 26 Feb 2015 16:16
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