Heat transfer enhancement using porous inserts

Wai Cheung Timothy Tong, M. C. Sharatchandra

Research output: Journal article publicationConference articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

This paper presents the results of an analysis of heat transfer in rectangular channels containing a porous insert. The objective is to investigate if it is possible to use porous inserts to enhance heat transfer. Momentum transfer in the porous region is modeled with the Brinkman-Extended Darcy model. For the fluid region, momentum transfer is modeled with the Navier-Stokes equation. These equations are solved analytically and the resulting solutions for the velocities are combined with the energy equations describing heat transfer in the fluid and porous regions. A variable grid-size implicit finite-difference method is used to solve the energy equations. Heat transfer between the channel walls and the fluid is determined as a function of Darcy number, ratio of the fluid and porous medium thermal conductivities, and the porous insert thickness. It is shown that heat transfer could be enhanced by placing a porous insert in the channel. Moreover, for some conditions heat transfer is maximized by using a porous insert thinner than the channel height while a porous insert that completely fills the channel is needed for other conditions.
Original languageEnglish
Pages (from-to)41-46
Number of pages6
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume156
Publication statusPublished - 1 Dec 1990
Externally publishedYes
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Dallas, TX, United States
Duration: 25 Nov 199030 Nov 1990

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

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