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Heat Transfer Research

ISSN for PRINT: 1064-2285

Institutional price:	$2485.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2006, Volume37

94 pages

DOI: 10.1615/HeatTransRes.v37.i1

Issue price - $363.00

Concerning Certain Characteristic Features of Heat and Mass Transfer on Permeable Surfaces

E. P. Volchkov
S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

ABSTRACT

It is shown that in the boundary layer on a porous surface at the given temperatures of the main stream and injected gas the heat flux on the wall q_w depends nonmonotonically on the injection intensity. Its magnitude first increases with injection j_w, then, having attained a maximum, decreases and tends to zero when j_w → j_cr. The problems of similarity of heat and mass transfer in boundary layers of variable composition are considered. The influence of the Lewis number Le on the similarity conditions is shown. Generally, not only the Lewis number but also an enthalpy drop influence the similarity relation. The usually adopted similarity form St_TLeⁿ = St_D is valid only in certain particular cases. Some results on the influence of flow accelerations and turbulence degree Tu on the characteristics of the boundary layer with combustion are given.