PASSIVE HEAT TRANSFER AUGMENTATION IN A CYLINDRICAL ANNULUS UTILIZING A POROUS PERTURBATION

Autor:	S. V. Iyer, Kambiz Vafai
Rok vydání:	1999
Předmět:	Convection Numerical Analysis Geometry Mechanics Heat transfer coefficient Condensed Matter Physics Nusselt number Finite element method Physics::Fluid Dynamics Heat transfer Annulus (firestop) Fluid dynamics Galerkin method Mathematics
Zdroj:	Numerical Heat Transfer, Part A: Applications. 36:115-128
ISSN:	1521-0634 1040-7782
DOI:	10.1080/104077899274804
Popis:	In this work, free convective fluid flow and heat transfer are analyzed in a horizontal cylindrical annulus in the presence of a porous geometric perturbation. The flow in the porous region is modeled using the Brinkman-Forchheimer-Darcy model. The numerical scheme used in the present study is based on a Galerkin method of the finite element formulation. The nature of the three-dimensional flow field has been analyzed in detail, and the local and average Nusselt numbers have been obtained for a range of Rayleigh numbers of practical interest. In order to evaluate the effect of a porous perturbation, the flow and heat transfer characteristics were compared with those for a regular annulus without a perturbation and one with a solid perturbation. This study reports on the dependence of the flow and heat transfer characteristics on the governing parameters such as the ratio of the conductivity of the porous material to that of the fluid and the permeability. A correlation has been obtained that captures the ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ba7dbc33ad2744d3de5b500e7ba0a34 https://doi.org/10.1080/104077899274804 Zobrazit plný text záznamu Plný text ve formátu PDF