|
|
Optimum design of a channel roughened by dimples
to improve cooling performance |
Abdus SAMAD,Ki-Don LEE,Kwang-Yong KIM,Jin-Hyuk KIM, |
Department of Mechanical
Engineering, Inha University, Incheon, Republic of Korea; |
|
|
Abstract Staggered arrays of dimples imprinted on opposite surfaces of an internal flow channel have been formulated numerically to enhance turbulent heat transfer compromising with pressure drop. The channel is simulated with the help of three-dimensional Reynolds-averaged Navier-Stokes (RANS) analysis. Three non-dimensional design variables based on dimple size and channel dimensions and two objectives related to heat transfer and pressure drag have been considered for shape optimization. A weighted-sum method for multi-objective optimization is applied to integrate multiple objectives into a single objective and polynomial response surface approximation (RSA) coupling with a gradient based search algorithm has been implemented as optimization technique. By the present effort, heat transfer rate is increased much higher than pressure drop and the thermal performance also has shown improvement for the optimum design as compared to the reference one. The optimum design produces lower channel height, wider dimple spacing, and deeper dimple as compared to the reference one.
|
Issue Date: 05 June 2010
|
|
|
Ligrani P M, Oliveira M M, Blaskovich T. Comparison of heat transferaugmentation techniques. AIAA J, 2003, 41(3): 337―362
doi: 10.2514/2.1964
|
|
Ridouane E H, Campo A. Heat transferand pressure drop characteristics of laminar air flows moving in aparallel plate channel with transverse hemi-cylindrical cavities. International Journal of Heat and Mass Transfer, 2007, 50(19,20): 3913―3924
|
|
Silva C, Marotta E, Fletcher L. Flow structure and enhancedheat transfer in channel flow with dimpled surfaces: Application toheat sinks in microelectronic cooling. Journal of Electronic Packaging, 2007, 129(2): 157―166
doi: 10.1115/1.2721087
|
|
Hwang S D, Cho H H. Heat transferenhancement of internal passage using dimple/ protrusion. Annals of the Assembly for International Heat TransferConference 13, Sydney, Australia, HTE24. 2006, 10―17
|
|
Mahmood G I, Mounir Z, Sabbagh M Z, Ligrani P M. Heat transfer in a channel with dimples and protrusionson opposite walls. Journal of Thermophysicsand Heat Transfer, 2001, 15(3): 275―283
doi: 10.2514/2.6623
|
|
Burgess N K, Ligrani P M. Effects of dimple depth on channel nusselt numbers and friction factors. Journal of Hear Transfer, 2005, 127(8): 839―847
doi: 10.1115/1.1994880
|
|
Burgess N K, Oliveira M M, Ligrani P M. Nusselt number behavior ondeep dimpled surfaces within a channel. Journal of Heat Transfer, 2003, 125(1): 11―18
doi: 10.1115/1.1527904
|
|
Park J, Ligrani P M. Numerical predictions of heat transfer and fluid flow characteristicsfor seven different dimpled surfaces in a channel. Numerical Heat Transfer, Part A, 2005, 47(3): 209―232
doi: 10.1080/10407780590886304
|
|
Park J, Desam P R, Ligrani P M. Numerical predictions offlow structure above a dimpled surface in a channel. Numerical Heat Transfer, Part A, 2004, 45(1): 1―20
doi: 10.1080/1040778049026740
|
|
Mahmood G I, Ligrani P M. Heat Transfer in a dimpled channel: Combined influences of aspectratio, temperature ratio, reynolds number, and flow structure. International Journal of Heat and Mass Transfer, 2002, 45(10): 2011―2020
doi: 10.1016/S0017-9310(01)00314-3
|
|
Moon H K, Connell T O, Glezer B. Channel height effect onheat transfer and friction in a dimpled passage. Journal of Engineering for Gas Turbines and Power, 2000, 122(2): 307―313
doi: 10.1115/1.483208
|
|
Myers R H, Montgomery D C. Response Surface Methodology-Process and Product Optimization UsingDesigned Experiments. New York: John Wiley & Sons, Inc, 2005
|
|
Kim K Y, Choi J Y. Shape optimizationof a dimpled channel to enhance turbulent heat transfer, Numerical Heat Transfer, Part A, 2005, 48(9): 901―915
doi: 10.1080/10407780500226571
|
|
Samad A, Shin D Y, Kim K Y, Goel T, Haftka R T. Surrogate modeling for optimizationof a dimpled channel to enhance heat?transfer performance. Journal of Thermophysics and Heat Transfer,?2007, 21(3): 667―670
doi: 10.2514/1.30211
|
|
Ansys Inc. Ansys CFX-11.0, 2006
|
|
Sleiti A K, Kapat J S. Comparisonbetween EVM and RSM turbulence models in predicting flow and heattransfer in rotating rib-roughened channels. Journal of Turbulence, 2006, 7(29): 1―21
|
|
Menter F R, Kuntz M, Langtry R. Ten years of industrial experience withthe SST turbulence model. In: Hanjalic K,Nagano Y, Tummers M. eds. Turbulence,Heat and Mass Transfer 4, Begell House Inc., 2003
|
|
Bardina J E, Hung P G, Coakley T. Turbulence modeling validation. Transaction of AIAA, 1997, 97―2121
|
|
Lai Y G, So R M C. Near-wallmodeling of turbulent heat fluxes. InternationalJournal of Heat and Mass Transfer, 1990, 33: 1429―1440
doi: 10.1016/0017-9310(90)90040-2
|
|
SAS Institute, Inc. JMP® 5.1, 2004
|
|
Collette Y, Siarry P. MultiobjectiveOptimization, Principles and Case Study. 1st ed. New York: Springer-Verlag, 2003
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|