Heat transfer by radiation and natural convection through a vertical annulus embedded in porous medium

Autor:	Kankanhalli N. Seetharamu, P. A. Aswatha Narayana, Zainal Alimuddin Zainal, Irfan Anjum Badruddin
Rok vydání:	2006
Předmět:	Convection Materials science Natural convection General Chemical Engineering Thermodynamics Mechanics Condensed Matter Physics Nusselt number Atomic and Molecular Physics and Optics Finite element method Physics::Fluid Dynamics Thermal radiation Heat transfer Annulus (firestop) Porous medium
Zdroj:	International Communications in Heat and Mass Transfer. 33:500-507
ISSN:	0735-1933
DOI:	10.1016/j.icheatmasstransfer.2006.01.008
Popis:	The effect of radiation and natural convection in a saturated porous medium embedded in a vertical annular cylinder has been investigated. Finite element method has been used to solve the governing equations. Influence of aspect ratio (A) and radius ratio (R) on Nusselt number is presented. The effect of radiation on heat transfer behavior is discussed. Results for two limiting cases of vertical cylinder and vertical plate embedded in saturated porous medium are presented. It is seen that average Nusselt number (N¯u) increases significantly with radiation parameter (Rd). N¯u attains maximum value at an aspect ratio of around one. N¯u always decreases with decrease in radius ratio.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4ac9ecc7458fa66ec7a2a55e585c0969 https://doi.org/10.1016/j.icheatmasstransfer.2006.01.008 Zobrazit plný text záznamu Full Text from ScienceDirect