The thermal analysis of fluid flow parallel to rotating surfaces

摘要

A numerical analysis has been made of the thermal analysis of fluid flow parallel to rotating surfaces with a two dimensional analysis and an allowance for a swirling component of velocity around the cylinder. The maximum blowing Reynolds number, Re/sub L/, based on the length of the cylinder, was 250000 and the rotational Reynolds number, Re/sub D/ based on the diameter of the cylinder, varied from 3000 to 30000. Buoyancy effects were neglected and turbulent flow assumed, these assumptions being supported by the experimental work. The data was correlated by a single equation for the range of Reynolds numbers considered. This result was applied to work on the application of electro-structured fluids to high speed rotating machines which has indicated the need for more general correlations for the prediction of heat transfer from rotating cylindrical surfaces in the presence of external airflows.