Combining Forced and Free Convective Equations to Represent Combined Heat-Transfer Coefficients for a Horizontal Cylinder

[+] Author and Article Information
Thomas W. Jackson

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga.

Howard H. Yen

Skidaway Institute of Oceanography, Savannah, Ga.

J. Heat Transfer 93(2), 247-248 (May 01, 1971) (2 pages) doi:10.1115/1.3449800 History: Received August 17, 1970; Online August 11, 2010


An analytical correlation of superposed free and forced convection for air for a horizontal cylinder in which the forced convection and free convection forces act in the same direction is considered. A simplified method by which the ordinary formulas for forced convection and for free convection can be used together to give the Nusselt number is presented. The method proposed herein can easily be modified to work for other combinations of free and forced flow systems. The method, therefore, may have wide application because standard formulas for simple systems are easily combined to obtain formulas which are valid for complicated systems.

Copyright © 1971 by ASME
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