Title

Combined natural convection and radiation heat transfer in a vertical air cavity with hexagonal honeycomb core of negligible thickness

Document Type

Article

Date of Original Version

1-1-1996

Abstract

Combined natural convection and radiation heat transfer in a vertical air cavity with a hexagonal honeycomb core of negligible thickness are investigated numerically. The numerical methodology is based on an algebraic coordinate transformation and finite volume technique. Temperature of the honeycomb core wall is determined such that radiation, convection, and conduction energy balances on the core wall are satisfied. The computations were performed for Ra = 103−105, for an aspect ratio of H/L = I, for Pr = 0.7, and for a wide range of emissivities. Heat transfer rates by both convection and radiation are presented as a function of emissivity, and the effect of radiation on the natural convection is discussed. The results showed natural convection is affected by radiation although the layer is filled with a transparent gas. This effect is accentuated in the case of a very thin wall.re demonstrated. © 1996, Taylor & Francis Group, LLC. All rights reserved.

Publication Title

Numerical Heat Transfer; Part A: Applications

Volume

30

Issue

1

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