Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

EXPERIMENTAL STUDY ON HEAT TRANSFER FROM A CYLINDER SUBMERGED IN A NON-NEWTONIAN FLUID

Get access (open in a dialog) DOI: 10.1615/IHTC6.1470
pages 335-339

Abstrakt

Much information is given on the forced convective heat transfer to a Newtonian fluid for submerged bodies but little data are presented on a non-Newtonian fluid even for a circular cylinder of fundamental systems. The present study is then experimentally performed on the heat transfer of circular cylinder submerged in a CMC solution which will be regarded as power-law fluid. For measurements of flow velocity a laser Doppler velocimeter was applied in order to prevent errors caused by a submerged probe in the non-Newtonian fluid. The cylinder surface covered with the stainless foil of 10 µm in thickness was electrically heated to uniform temperature. The obtained Nusselt number could be correlated to a function of a generalized Reynolds number and to a generalized Prandtl number given by Acrivos et al. (8) . These results are also similarly expressed by empirical formula; Nu=c·Rem·Prn which is appropriated for a Newtonian fluid. Therefore it is evident that formula of this type can be extended to evaluate the average heat transfer coefficient in the case of power-law non-Newtonian fluid, using a generalized Reynolds number and a generalized Prandtl number.