Title

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

Document Type

Conference Proceeding

Date of Original Version

1-1-1997

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 to 105, for an aspect ratio of H/L = 1, for Pr = 0.7, and for 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.

Publication Title

American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

Volume

305

Share

COinS