On the Heat Transfer Coefficient of Elliptic Cylinders due to Natural Convection (1 st Report)

Abstract

The writer has carried out an approximate solution on the heat transfer due to the natural convection around the horizontal elliptic cilinder and obtained a relation between Nusselt number (Nu) and Grashof number (Gr) as follows : Nu=0.604(√(1-ε²)/K)^1/4g(x)_m·Gr^1/4 in which ε is the eccentricity of the cross section of the cylinder, K a constant depending on ε, x the angle of obliquity and g (x)_m a function of x depending on ε. The numerical results are tabulated and expressed by a diagram comparing with those of horizontal and vertical flat plates or circular cylinders.