Accession Number : AD0420095

Title :   LAMINAR FREE CONVECTION FROM A HORIZONTAL CYLINDER WITH PRESCRIBED SURFACE HEAT FLUX,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Koh,J. C. Y. ; Price,J. F.

Report Date : AUG 1963

Pagination or Media Count : 27

Abstract : Laminar free convection from a horizontal cylinder having a prescribed surface heat flux is analysed. The wall surface heat flux is assumed to be varied in the manner of a sub 1 (X/R) square + a sub 2 (X/R) square. Special transformations are devised and employed so that the resulting differential equations and boundary conditions are free of the parameters a sub 1 and a sub 2. These differential equations are solved once and for all; solutions to the original equations for any particular values of a sub 1 and a sub 2 may then be obtained easily as linear combinations of the numerical solutions. It is found that the average Nusselt number for a cylinder having a uniform surface heat flux is larger than that for a cylinder having an isothermal surface by no more than 4 per cent. (Author)

Descriptors :   (*CYLINDRICAL BODIES, CONVECTION), HEAT TRANSFER, LAMINAR FLOW, SURFACE TEMPERATURE, DIFFERENTIAL EQUATIONS, VELOCITY, TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE