0
Research Papers: Fundamental Issues and Canonical Flows

Effect of Slip on the Entropy Generation From a Single Rotating Disk

[+] Author and Article Information
Aytac Arikoglu

Faculty of Aeronautics and Astronautics, Aeronautical Engineering Department, Istanbul Technical University, Maslak, TR-34469 Istanbul, Turkey

Guven Komurgoz

Faculty of Electric and Electronics, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey

Ibrahim Ozkol1

Faculty of Aeronautics and Astronautics, Aeronautical Engineering Department, Istanbul Technical University, Maslak, TR-34469 Istanbul, Turkeyozkol@itu.edu.tr

1

Corresponding author.

J. Fluids Eng 130(10), 101202 (Sep 02, 2008) (9 pages) doi:10.1115/1.2953301 History: Received November 13, 2007; Revised May 15, 2008; Published September 02, 2008

In this study, it is the first time that the effect of slip on the entropy generation is investigated for the flow over a rotating single free disk. The problem is considered for steady and axially symmetrical case in a Newtonian ambient fluid. The classical approach introduced by Von Karman is followed to reduce nonlinear flow and heat field equations to ordinary differential equations. Then these equations are solved by using differential transform method. Entropy generation equation for this system is then derived and nondimensionalized. This equation, which has never been introduced for such a geometry and boundary conditions before in open literature, is interpreted for various physical cases by using nondimensional parameters of fluid and heat fields. It is observed that the effects of slip are to reduce the magnitude of entropy generation and to reduce the total energy in the system by reducing velocities and velocity gradients. Also, while entropy generation reduces, Bejan number converges to 1 with increasing slip factor.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

The change of Beav with respect to γ and Re for Ψ=10−10

Grahic Jump Location
Figure 2

The change of NG,av with respect to γ and Re for Ψ=10−10

Grahic Jump Location
Figure 3

The change of Beav with respect to γ and Ψ for Re=60,000

Grahic Jump Location
Figure 4

The change of NG,av with respect to γ and Ψ for Re=60,000

Grahic Jump Location
Figure 5

The change of NG at ζ=0 with respect to r¯ and Ψ for Re=60,000 and γ=0.5

Grahic Jump Location
Figure 6

The change of NG at ζ=0 with respect to r¯ and Re for Ψ=10−10 and γ=0.5

Grahic Jump Location
Figure 7

The change of Δ with respect to γ and Re for Ψ=5×10−10

Grahic Jump Location
Figure 8

The change of Δ with respect to γ and Ψ for Re=60,000

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In