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Heat and mass transfer from rotating cones

Published online by Cambridge University Press:  28 March 2006

C. L. Tien  and
D. T. Campbell
C. L. Tien
Affiliation:
Department of Mechanical Engineering, University of California at Berkeley
D. T. Campbell
Affiliation:
Department of Mechanical Engineering, University of California at Berkeley
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Abstract

Heat transfer by convection from isothermal rotating cones is investigated experimentally by measuring the sublimation rate from naphthalene-coated cones and using the analogy between heat and mass transfer. Measurements are made for a range of conditions from entirely laminar flow to conditions when the outer 70% of the surface area is covered by turbulent flow. Mass-transfer measurements for laminar flow over cones of vertex angles 180°, 150°, 120° and 90° are in good agreement with the theoretical prediction. For turbulent flow, experimental results for cones of the above vertex angles also agree very well with the semi-empirical analogy calculations for the disk case. A different heat- and mass-transfer relationship with the rotational Reynolds number is observed in the measurements on the 60° cone, and is believed to be due to a change of flow characteristics. The instability and the transition of flows over different cone models are also discussed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 17 , Issue 1 , September 1963 , pp. 105 - 112
Copyright
© 1963 Cambridge University Press

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