Pressure gradient effect in natural convection boundary layers

Higuera Antón, Francisco and Liñán Martínez, Amable (1993). Pressure gradient effect in natural convection boundary layers. "Physics of Fluids. A, Fluid Dynamics", v. 5 (n. 10); pp. 2443-2453. ISSN 0899-8213.

Description

Title: Pressure gradient effect in natural convection boundary layers
Author/s:
  • Higuera Antón, Francisco
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: Physics of Fluids. A, Fluid Dynamics
Date: 1993
ISSN: 0899-8213
Volume: 5
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The high Grashof number laminar natural convection flow around the lower stagnation point of a symmetric bowl- shaped heated body is analyzed. A region is identified where the direct effect on the flow of the component of the buoyancy force tangential to the body surface is comparable to the indirect effect of the component normal to the surface, which acts through the gradient of the nonuniform pressure that it induces in the boundary layer. Analysis of this region provides a description of the evolution of the flow from a pressure-gradient dominated regime to a buoyancy dominated regime. Numerical results are presented for the flows above and below heated power-law body shapes, and the upstream propagation of small perturbations to the stationary flow is discussed. An asymptotic analysis is carried out for the flow below nearly flat horizontal bodies, for which the change from pressure-gradient-driven to buoyancy-driven flow occurs very rapidly in a short region. The influence of body edges located in the region of interest is also discussed.

More information

Item ID: 1380
DC Identifier: http://oa.upm.es/1380/
OAI Identifier: oai:oa.upm.es:1380
Official URL: http://pof.aip.org/
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 20 Feb 2009
Last Modified: 20 Apr 2016 06:48
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