Abstract




 
   

Vol. 12, No. 4 (November 1999) 259-270   

downloaded Downloaded: 76   viewed Viewed: 1576

  NUMERICAL INVESTIGATION OF COMBINED RADIATION AND NUTRAL CONVENTION HEAT TRANSFER IN A HORIZONAL ANNULUS
 
 
M. Rahnama, M. Djavidi, S. H. Mansouri and M. Sinaie
 
Mechanical Engineering Department
Shahid- Bahonar University of Kerman, Kerman, Iran
 
 
 
( Received: October 03, 1998 – Accepted in Revised Form: April 08, 1999 )
 
 

Abstract    Combined radiation and natural convection within the annular region of two infinitely long horizontal concentric cylinders are investigated numerically in this research. Radial and tangential radiation effects ate considered using Milne-Eddington approximation for a two-dimensional radiative transfer. The basic conservation equations are discretized with the finite volume method and SIMPLER algorithm. The result are presented through velocity vector field, streamline and isothermal plots. It is observed that radiation has significant effect on flow and temperature fields. Results of local Nusselt number prediction along the surface of the inner cylinder show that radiation suppresses the angular dependence of Nusselt number.

 

Keywords    Radiation, Laminar Natural Convection, SIMPLER

 

References   

 
1. Onyegegbu, S. O., "Heat Transfer Inside a Horizontal Cylindrical Annulus in the Presence of Thermal Radiation and Buoyancy", Int. Heat Mass Transfer, 29, (1986), 659-671.
2. Tan, Z. and Howell, R., "Combined Radiation and Natural Convection in a Participating Medium Between Horizontal Concentric Cylinders", ASME National Heat Transfer Conf., HTD, Vol. 106, Heat Transfer Phenomena in Radiation, Combustion and Fire, (1989), 87-93.
3. Webb, B. W. and Viskanta, R., "Radiation-induced buoyancy-driven flow in rectangular enclosures: experiment and analysis", ASME J. Heat Transfer, 109, (1987), 427-433.
4. Kuehn, T. H. and Goldstien, R. J., "An Experimental and Theoretical Study of Natural Convection Heat Transfer in Concentric and Eccentric Horizontal Cylindrical Annuli", J. Fluid Mech., 74, (1976), 695-719.
5. Kuehn, T. H. and Goldstien, R. J., "An Experimental Study of Natural Convection Heat Transfer in Concentric and Eccentric Horizontal Cylindrical Annuli", ASME J. Heat Transfer, vol. 100, (1978) 635-640.
6. Hessami, M. A., Pollard, A. and Rowe, R. D., "Numerical Calculation of Natural Convection Heat Transfer between Horizontal Concentric Isothermal Cylinders: Effect of Variation of Fluid Properties", ASME J. Heat Transfer, 106, (1984), 668-671.
7. Fukuda, K., Miki, Y. and Hasegawa, S., "Analytical and Experimental Study on Turbulent Natural Convection in A Horizontal Annulus", Int. J. Heat Mass Transfer, 33, (1990), 629-639.
8. Desai, S. P. and Vafai, K., "An Investigation and Comparative Analysis of Two-and Three-Dimensional Turbulent Natural Convection in A Horizontal Annulus", Int. J. Heat Mass Transfer, 16, (1994), 2475-2504.
9. Fukuda, K., Miki, Y., Tanigushi, K. Morita and Hasegawa, S., "Direct Eddy Simulation and Large Eddy Simulation of Turbulent Natural Convection in Horizontal Annulus", Memoirs of Faculty of Engineering-Kyushu University, 51, (1991), 355-369.
10. Higenyi, J. and Bayazidtoglu, Y., "Differential approximation of radiative heat transfer in a gray medium", J. Heat Transfer, 102, (1980), 719-723.
11. Azad, F. H. and Modest, M. F., "Evaluation of the Radiative Heat Flux in Absorbing, Emitting and Linearly-Anisotropically Scattering Cylindrical Media", J. Heat Transfer, 103, (1981), 350-356.
12. Arpaci, V. S. and Gozum, D., "Thermal Stability of Radiating Fluids: The Benard Problem",Phys. Fluids, 16, (1973), 581-589.
13. Patankar, S. V., "Numerical Heat Transfer and Fluid Flow, Hemispher Pub. Corr" (1980).
14. Powe, R. E., Carley, C. T. and Caruth, S. L., "A Numerical Solution for Natural Convection in Cylindrical Annuli", J. Heat Transfer, 93, (1971), 210-220.





International Journal of Engineering
E-mail: office@ije.ir
Web Site: http://www.ije.ir