Transactions of the Japan Society of Mechanical Engineers
Online ISSN : 2185-9485
Print ISSN : 0029-0270
ISSN-L : 0029-0270
On the Heat Transfer Coefficient of Elliptic Cylinders due to Natural Convection (1 st Report)
Kiyo KATO
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1957 Volume 23 Issue 136 Pages 918-922

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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·Gr1/4 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.
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