Free convection from a point source of heat, and heat transfer from spheres at small Grashof numbers

Kurdyumov, V. and Liñán Martínez, Amable (1999). Free convection from a point source of heat, and heat transfer from spheres at small Grashof numbers. "International Journal of Heat and Mass Transfer", v. 42 (n. 20); pp. 3849-3860. ISSN 0017-9310.

Description

Title: Free convection from a point source of heat, and heat transfer from spheres at small Grashof numbers
Author/s:
  • Kurdyumov, V.
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: International Journal of Heat and Mass Transfer
Date: 1999
ISSN: 0017-9310
Volume: 42
Subjects:
Freetext Keywords: Heat conduction; Heat transfer; Heating; Laminar flow; Nusselt number; Prandtl number; Spheres; Grashof numbers; Laminar flow Nusselt number; Natural convection; convection; particle; sphere
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

A numerical description, based on the Boussinesq equations, is given for the steady free convection ¯ow due to a point source of heat and heated spheres. We begin with the non-dimensional formulation of the problem for the point source giving the numerical solution for a wide range of values of the Prandtl number, the remaining parameter. The analytical description of the temperature and ¯ow ®elds close to the point source includes constants that are evaluated numerically and are used to obtain the ¯ow ®eld around heated spheres for small Grashof numbers, and the correction of the Nusselt number, due to free convection, from its heat conduction value. The numerical solution of the free convection problem over a sphere at moderate and small Grashof numbers is carried out for Pr=0.72 and 7. Based on the small and large Grashof number descriptions, a correlation expression is proposed for the laminar ¯ow Nusselt number, covering all Grashof numbers.

More information

Item ID: 877
DC Identifier: http://oa.upm.es/877/
OAI Identifier: oai:oa.upm.es:877
Official URL: http://www.elsevier.com/locate/ijhmt
Deposited by: Archivo Digital UPM
Deposited on: 22 Feb 2008
Last Modified: 20 Apr 2016 06:34
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