The present work examines the effects of temperature and velocity jump conditions on heat transfer, fluid flow, and entropy generation. As the physical model, the axially symmetrical steady flow of a Newtonian ambient fluid over a single rotating disk is chosen. The related nonlinear governing equations for flow and thermal fields are reduced to ordinary differential equations by applying so-called classical approach, which was first introduced by von Karman. Instead of a numerical method, a recently developed popular semi numerical-analytical technique; differential transform method is employed to solve the reduced governing equations under the assumptions of velocity and thermal jump conditions on the disk surface. The combined effects of the velocity slip and temperature jump on the thermal and flow fields are investigated in great detail for different values of the nondimensional field parameters. In order to evaluate the efficiency of such rotating fluidic system, the entropy generation equation is derived and nondimensionalized. Additionally, special attention has been given to entropy generation, its characteristic and dependency on various parameters, i.e., group parameter, Kn and Re numbers, etc. It is observed that thermal and velocity jump strongly reduce the magnitude of entropy generation throughout the flow domain. As a result, the efficiency of the related physical system increases. A noticeable objective of this study is to give an open form solution of nonlinear field equations. The reduced recurative form of the governing equations presented gives the reader an opportunity to see the solution in open series form.

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# Combined Effects of Temperature and Velocity Jump on the Heat Transfer, Fluid Flow, and Entropy Generation Over a Single Rotating Disk

A. Arikoglu

,
A. Arikoglu

Department of Aeronautical Engineering, Faculty of Aeronautics and Astronautics,

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey
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G. Komurgoz

,
G. Komurgoz

Department of Electrical Engineering, Faculty of Electrical and Electronic Engineering,

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey
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I. Ozkol

,
I. Ozkol

Department of Aeronautical Engineering, Faculty of Aeronautics and Astronautics,

ozkol@itu.edu.tr
Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey
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A. Y. Gunes
Department of Aeronautical Engineering, Faculty of Aeronautics and Astronautics,

A. Y. Gunes

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey
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A. Arikoglu

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey
G. Komurgoz

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey
I. Ozkol

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkeyozkol@itu.edu.tr

A. Y. Gunes

Istanbul Technical University

, Maslak, TR-34469 Istanbul, Turkey*J. Heat Transfer*. Nov 2010, 132(11): 111703 (10 pages)

**Published Online:**August 13, 2010

Article history

Received:

February 17, 2010

Revised:

June 10, 2010

Online:

August 13, 2010

Published:

August 13, 2010

Citation

Arikoglu, A., Komurgoz, G., Ozkol, I., and Gunes, A. Y. (August 13, 2010). "Combined Effects of Temperature and Velocity Jump on the Heat Transfer, Fluid Flow, and Entropy Generation Over a Single Rotating Disk." ASME. *J. Heat Transfer*. November 2010; 132(11): 111703. https://doi.org/10.1115/1.4002098

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