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http://dx.doi.org/10.6112/kscfe.2012.17.1.001

HEAT-TRANSFER ANALYSIS OF A COOLING CHANNEL WITH INCLINED ELLIPTICAL DIMPLES  

Kim, H.M. (Dept. of Mechanical Engineering, Inha Univ.)
Moon, M.A. (Dept. of Mechanical Engineering, Inha Univ.)
Kim, K.Y. (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Journal of computational fluids engineering / v.17, no.1, 2012 , pp. 1-7 More about this Journal
Abstract
This paper deals with a parametric study on inclined elliptical dimples to enhance heat transfer in a channel. Three-dimensional Reynolds-averaged Naiver-Stokes equations are solved to estimate flow and heat transfer in dimpled channel. As turbulence closure, the low-Re shear stress transport model is employed. Two non-dimensional geometric variables, dimple ellipse diameter ratio and angle of main diameter to flow direction are selected for the parametric study. The inclined elliptical dimples show higher heat-transfer performance but with higher pressure drop compared to the circular dimples. And there is an optimum inclination angle that gives the maximum heat transfer.
Keywords
Dimple; Cooling channel; Nusselt Number; Heat Transfer; Three-Dimensional Reynolds-Averaged Navier-Stokes Equation;
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  • Reference
1 1994, Menter, F.R., "Two-equation eddy-viscosity turbulence models for engineering applications," AIAA-Journal, Vol.32, No.8, pp.1598-1605.   DOI
2 2008, Chang, S.W., Yang T.W., Huang, C.C. and Ching, K.F., "Endwall heat transfer and pressure drop in rectangular channels with attached and detached circular pin-fin array," International Journal of Heat Mass Transfer, Vol.51, pp.5247-5259.   DOI
3 2002, Mahmood, G.I. and Ligrani, P.M., "Heat transfer in a dimpled channel: combined influences of aspect ratio, temperature ratio, Reynolds number, and flow structure," International Journal of Heat and Mass Transfer, Vol.45, pp.2011-2020.   DOI
4 2001, Ligrani, P.M., Mahmood, G.I., Harrison, J.L,. Clayton, C.M. and Nelson, D.L., "Flow structure and local Nusset number variations in a channel with dimples and protrusion on opposite walls," International Journal of Heat and Mass Transfer, Vol.44, pp.4413-4425   DOI
5 2002, Moon, S.W. and Lau, S.C., "Turbulent heat transfer measurements on a wall with concave and cylindrical dimples in a square channel," ASME Turbo Expo 2002, GT2002-30208.
6 2008, Elyyan, M.A,. Rozati, A. and Tafti, D.K., "Investigation of dimpled fins for heat transfer enhancement in compact heat exchangers," International Journal of Heat and Mass Transfer, Vol.51, pp.2950-2966.   DOI
7 2003, Isaev, S.A. and Leont'ev, A.I., "Numerical simulation of vortex enhancement of heat transfer under conditions of turbulent flow past a spherical dimple on the wall of a narrow channel," High Temperature, Vol.44, pp.665-679.
8 2008, Samad, A., Lee, K.D. and Kim, K.Y., "Multiobjective optimization of a dimpled channel for heat transfer augmentation," Heat Mass Transfer, Vol.45, pp.207-217.   DOI
9 2005, Park, J. and Ligrani, P.M., "Numerical predictions of heat transfer and fluid flow characteristics for seven different dimpled surfaces in a channel," Numerical Heat Transfer-Part A, Vol.47, pp.209-232.   DOI
10 2009, Silva, C., Park, D., Marotta, E.E. and Fletcher, L.S., "Optimization of fin performance in a laminar channel flow through dimpled surfaces," Journal of Heat Transfer, Vol.131, No.2, 021702-1-021702-9.   DOI
11 2002, Vicente, P.G., Garcia, A. and Viedma, A,. "Heat transfer and pressure drop for low Reynolds turbulent flow in helically dimpled tube," International Journal of Heat and Mass Transfer, Vol.45, pp.543-553.   DOI
12 2006, ANSYS CFX-11.0 Solver Theory, Ansys Inc.
13 2008, Hwang, S.D., Kwon, H.G. and Cho, H.H., "Heat transfer with dimple/protrusion arrays in a rectangular duct with a low Reynolds number range," International Journal of Heat and Fluid Flow, Vol.29, pp.916-926.   DOI