Abstract
This paper is a continuation of the authors' earlier work on a mechanism of turbulent heat transfer in liquid metals [1]. Nusselt number and temperature profile for low Prandtl number fluids of constant properties flowing in a smooth pipe with constant wall temperature have been evaluated. Use is made of the theoretical expression for the ratio of eddy diffusivities for heat and momentum deduced in [1]. For practical calculation of film coefficient of heat transfer, an interpolation formula is proposed: N Nu = 5 + 0.05 N Pr 0.25 N Pe 0.77 which fits the calculated data with a maximum deviation of less than 11 per cent for N Pr < 0.1 and N pe < 15 000. Temperature profiles for several Prandtl and Reynolds numbers were compared with the case of constant wall flux.
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