Theoretical and Experimental Study For Laminar Forced Convection Heat Transfer Through Acicular Cross Section Channel and Heated Under Constant Heat Flux
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This research concerned with theoretical and experimental study of forced convection through circular cross section channel that is horizontally arranged and heated under constant heat flux. The theoretical part delt with numerical solution for momentum equation of one dimension and energy equation of tow dimension by used of finite difference at variable grid size in vertical direction at gradient pressure between (103-106) The energy equation used implicit method and marching process to find the value and distribution of temperature through this channel. This model have been compared with another that have variable permeability and porosity and show that the change in permeability and channeling phenomena have significant effect on increase of rate of heat transfer and also increase in Nusselt number to 30% and also show show that the increase in gradient pressure is variant with rate of heat transfer ,but this variant disappear in thermal fully develop region. In experimental part testes was carried out for three value of Peclet numbers (17,25,40) with change of amount of power supply for each number. The results show hat the increase rate of heat transfer cause increase of Nusselt number and also show good agreement between theoretical and experimental results especially at low Nusselt number and also show there is deviation of experiential result from the theoretical result at high Nusselt number about 20%.
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References
Kaviany, M., ” Laminar Flow Through a Porous Channel Bounded By Isothermal Parallel Plate”, Int.J.H.M.T, Vol. 28, No. 4, pp. 851-858., 1984. DOI: https://doi.org/10.1016/0017-9310(85)90234-0
Vafai, K. et al. , ” An Experimental Investigations of Heat Transfer in Variable Pororsity Media” , ASME J.H.T, Vol. 107, pp. 642- 647., 1985. DOI: https://doi.org/10.1115/1.3247472
Poulikakos, D., and Renken, K. , ” Forced convection in a Channel Filled with Porous Medium, Including The Effect of Flow Inertia, Variable porosity , and Brinkman Friction”, ASME J.H.T, Vol. 109, pp 880-888., 1987. DOI: https://doi.org/10.1115/1.3248198
Renken, K.J., and Poulikakos, D., ” Experimental and Analysis of Forced Convection Heat Transfer in a Packed bed of Spheres, Int. J.H..M. Vol 30 ,No. 7, pp 1399-1408., 1987. DOI: https://doi.org/10.1016/0017-9310(88)90249-9
Renken, K.J., and Poulikakos, D., ” Experiments on Forced Convection form a Horizontal Heated Plate in a Packed bed of Glass Spheres, ASME J.H..M. Vol 111 , pp 59- 65. 1989. DOI: https://doi.org/10.1115/1.3250658
Hadim, A., “Forced Convection in a Porous Channel with Localized Heat Source”,ASME J.H.T.vol, 116, pp 465-472., .1994 DOI: https://doi.org/10.1115/1.2911419
Hwang.G,J., and Cho,C.H., “Heat Transfer Measurement and analysis for Sintered Porous Channel”, ASME J.H.T. vol.114 , pp. 456-464., 1994. DOI: https://doi.org/10.1115/1.2911418
Chou,F.C. et al,”A Re-evaluation of Non-Darcian Forced and Mixed Convection in cylindrical Packed Tube” ASME J.H.T. vol.116, pp. 513-516.,1994. DOI: https://doi.org/10.1115/1.2911432
Kaviany,M. , ” Principles of Heat Transfer in Porous Media”,Springer-Verag Newyork,,2th Edition, 1999.
Al-Daher,M and Jasim,A.H., “A Theoretical and Experimental Study on Laminar Forced Convection Heat Transfer Through a Horizontal Tube Filled With Porous Media”,Scientific Jorur.Tikrit Univ.Eng.Sei.Vol.9,No.1,pp.41-59., 2002.
Yoo,J.S. and Schultz,W.W., “Thermal Convection in Horizontal Porous Layer With Spatially Periodic Boundary Temperature: Small Ra Flow”, Int. J.H..M. Vol. 46 ,No. 7, pp 4747-4750., .2003 DOI: https://doi.org/10.1016/S0017-9310(03)00300-4