Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-25T16:10:40.813Z Has data issue: false hasContentIssue false
  • English
  • Français

Numerical Investigation of Forced Laminar Convection Flow of Nanofluids Over a Backward Facing Step Under Bleeding Condition

Published online by Cambridge University Press:  08 May 2012

M. S. Pour  and
S. A. G. Nassab
M. S. Pour
Affiliation:
Department of Mechanical Engineering, School of Engineering, Shahid Bahonar University, Kerman, Iran
S. A. G. Nassab*
Affiliation:
Department of Mechanical Engineering, School of Engineering, Shahid Bahonar University, Kerman, Iran
*
*Corresponding author ([email protected])
Get access

Abstract

In this paper, single-phase laminar forced convection of nanofluids flow over a 2D horizontal backward facing step (BFS) subjected to bleeding condition (suction/blowing) is investigated numerically. The continuity, momentum and energy equations are solved by computational fluid dynamic (CFD) technique, while the SIMPLE algorithm is employed for pressure-velocity coupling. Various volume fractions of nano-particles are dispersed in a base fluid (water) to produce different types of nanoflouids. In each test case, the velocity and temperature fields are computed to verify the hydrodynamic and thermal behaviors of convective system. Besides, the distributions of Nusselt number and friction coefficient at the stepped wall are obtained. Comparison between the present numerical results with experiment shows a good consistency.

Keywords

NanofluidsBackward facing stepForced laminar convectionBleeding condition
Type
Technical Note
Information
Journal of Mechanics , Volume 28 , Issue 2 , June 2012 , pp. N7 - N12
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Choi, S. U. S., Zhang, Z. G., Yu, W., Lockwood, F. E. and Grulke, E. A., “Anomalous Thermal Conductivity Enhancement in Nanotube Suspension,” Applied Physics Letters, 79, pp. 2252–2254 (2001).CrossRefGoogle Scholar
2. Yoo, D. H., Hong, K. S. and Yang, H. S., “Study of Thermal Conductivity of Nanofluids for the Application of Heat Transfer Fluids,” Thermochimica Acta, 455, p. 66 (2007).Google Scholar
3. Hamilton, R. L. and Crosser, O. K., “Thermal Conductivity of Heterogeneous Two Component Systems,” I & EC Fundamentals, 1, pp. 187–191 (1962).CrossRefGoogle Scholar
4. Trisaksri, V. and Wongwises, S., “Critical Review of Heat Transfer Charactristics of Nanofluids,” Renewable Sustainable Energy Reviews, 11, pp. 512–523 (2007).CrossRefGoogle Scholar
5. Abu-Nada, E., “Application of Nanofluids for Heat Transfer Enhancement of Separated Flows Encountered in a Backward Facing Step,” International Journal of Heat and Fluid Flow, 29, pp. 242–249 (2008).CrossRefGoogle Scholar
6. Abu-Nada, E., “Investigation of Entropy Generation Over a Backward Facing Step Under Bleeding Condition,” International Journal of Energy Conversion and Management, 49, pp. 3237–3242 (2008).CrossRefGoogle Scholar
7. Shukla, R. K. and Dhir, V. K., “Study of the Effect of Thermal Conductivity of Nanofluids,” International Mechanical Engineering Congress and Exposition, ASME, Orlando, FL, U.S.A. (2005).Google Scholar
8. Brinkman, H. C., “The Viscosity of Concentrated Suspensions and Solutions,” Journal of Chemistry Physics, 20, pp. 571–581 (1952).CrossRefGoogle Scholar
9. Khanafer, K., Vafai, K. and Lightstone, M., “Buoyancy-Driven Heat Transfer Enhancement in a Two-Dimensional Enclosure Utilizing Nanofluids,” International Journal of Heat and Mass Transfer, 46, pp. 3639–3653 (2003).CrossRefGoogle Scholar
10. Eastman, J. A., Choi, S. U. S., Li, S., Soyez, G., Thompson, L. J. and Di Melfi, R. J., “Novel Thermal Properties of Nanostructured Materials,” Material Science Forum, 312–314, pp. 629–634 (1999).CrossRefGoogle Scholar
11. Patankar, S. V., Numerical Heat Transfer and Fluid Flow. Hemisphere Publishing Corporation, Taylor and Francis Group, New York (1972).Google Scholar
12. Armaly, B. F., Durst, F., Pereira, J. C. F. and Schönung, B., “Experimental and Theoretical Investigation of Backward-Facing Step Flow,” Journal of Fluid Mechanics, 127, pp. 473–496 (1983).CrossRefGoogle Scholar