Numerical Flow and Heat Transfer in a Channel with Various Shaped Ribs


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Abstract


Abstract – A numerical investigation of convective heat transfer between a fluid and some physical obstacles (ribs) mounted on the lower wall (12 ribs) and on the upper wall (13 ribs) of a channel was conducted. This technique is used in the internal cooling of turbine blades. The governing equations have been solved in a two-dimensional domain using a control volume method and the SIMPLE algorithm for the velocity-pressure coupling is employed. Computation was made for three shaped ribs, rectangular, triangular and semicircular cross-sections. The flow Reynolds number for this numerical study is varied between 200 and 1000 and the Prandtl number is equal to 0.71. The rib height-to-channel hydraulic diameter, width-to channel hydraulic diameter and pitch-to-height ratio are fixed at h=0.214, w=0.74 and p=10, respectively. The grid is non uniform and is highly concentrated close to the rib to capture high gradient velocity, pressure and temperature. A uniform temperature through the ribs and all walls was assumed. We have determined distributions of velocity, friction factor, temperature and Nusselt number according to the shaped ribs and Reynolds numbers
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Keywords


Forced Convection; Heat Transfer Enhancement; Grooved Channel; Finite Volume Method; Shaped Ribs

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References


J. J. Hwang, Heat Transfer-Friction Characteristics Comparison in Rectangular Ducts with Slit and Solid Ribs Mounted on One Wall, J. Heat Transfer, 120, 709, 1998.
http://dx.doi.org/10.1115/1.2824340

J.C. Han, L.R. Glicksman, and W. M. Rohsenow, An Investigation of Heat Transfer and Friction Factor for Rib-Roughened Surfaces, Int. J. Heat Mass Transfer, 21, 1143, 1978.
http://dx.doi.org/10.1016/0017-9310(78)90113-8

H. J. Kwon, S. J. Wu, and H. H. Cho, Effects of Discrete Rib-Turbulators on Heat/Mass Transfer Augmentation in a Rectangular Duct, Trans. KSME (B), 24, 744, 2000.

I. Kilicaslan, H.I. Sarak, Enhancement of heat transfer in compact heat exchanger by different type of rib with holographic interferometry, Experimental Thermal and Fluid Science, 17, pp. 339-346, 1998.
http://dx.doi.org/10.1016/s0894-1777(98)00006-5

K Hijikata, and Y. Mori, Fundamental Study of Heat Transfer Augmentation of Tube Inside Surface by Cascade Smooth Turbulence Promoters and Its Application to Energy Conversion, Wάrme- und-Stoffǔbertragung, 21, 115,1987.
http://dx.doi.org/10.1007/bf01377567

B. Farhanieh, C. Herman, and B. Sunden, Numerical and experimental analysis of laminar fluid flow and forced convection heat transfer in a grooved duct, International Journal of Heat and Mass Transfer, Vol. 36. n. 6, pp. 1609-1617, 1993.
http://dx.doi.org/10.1016/s0017-9310(05)80070-5

D.N. Ryu, D.H. Choi, and V.C Patel, Analysis of turbulent flow in channels roughened by two-dimensional ribs and three-dimensional blocks. Part II: Heat transfer, International Journal of Heat and Fluid Flow, Vol. 28, n. 5, pp. 1112-1124, 2007.
http://dx.doi.org/10.1016/j.ijheatfluidflow.2006.11.007

A. Layek, J.S. Saini, , and S.C. Solanki, Heat transfer and friction characteristics for artificially roughened ducts with compound turbulators, International Journal of Heat and Mass Transfer, Vol. 50, n. 23-24, pp. 4845-4854, 2007.
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2007.02.042

S.V. Patankar, Numerical heat transfer and fluid flow, McGraw-Hill, New York, 1980.
http://dx.doi.org/10.1002/cite.330530323

Z. Lilek, An implicit finite-volume method using non-matching blocks of structured grid, Numer. Heat Transfer, Part B, Vol. 32, pp. 385-401, 1997.
http://dx.doi.org/10.1080/10407799708915015

A. Bejan, A.D. Kraus, Heat Transfer Handbook, John Wiley and Sons, 2003.


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