Three-Dimensional Laminar Natural Convection in a Vertical Air Slot With Hexagonal Honeycomb Core

[+] Author and Article Information
Y. Asako, H. Nakamura

Department of Mechanical Engineering, Tokyo Metropolitan University, Setagaya, Tokyo, 158, Japan

M. Faghri

Department of Mechanical Engineering and Applied Mechanics, University of Rhode Island, Kingston, RI 02881

J. Heat Transfer 112(1), 130-136 (Feb 01, 1990) (7 pages) doi:10.1115/1.2910334 History: Received May 05, 1988; Revised June 25, 1989; Online May 23, 2008


Numerical solutions are obtained for a three-dimensional natural convection heat transfer problem in a vertical air slot with a thin hexagonal honeycomb core. The air slot is assumed to be of such dimensions that the velocity and temperature fields repeat themselves in successive enclosures. The numerical methodology is based on an algebraic coordinate transformation technique, which maps the complex cross section onto a rectangle, coupled with a calculation procedure for fully elliptic three-dimensional flows. The calculations are performed for the Rayleigh number in the range of 103 to 105 , for a Prandtl number of 0.7, and for five values of the aspect ratio of the honeycomb enclosure. The average Nusselt number results for the case of a thin honeycomb core are compared with the previously obtained results for a thick honeycomb core with conduction and adiabatic side wall boundary conditions.

Copyright © 1990 by The American Society of Mechanical Engineers
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