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- W4225727720 abstract "Dimples, as a passive method, have been investigated and showed heat transfer enhancement capability accompanied by drag reduction, increasing the overall thermo-aerodynamic efficiency of the system. In this study, we investigate the effect of different dimple geometries on heat transfer enhancement and drag reduction capability. The study depends on Large Eddy Simulation with Wall Adapting Local Eddy-viscosity (LES-WALE) model as the numerical scheme to simulate the flow over the different dimples. All the dimples under study have a constant depth-to-diameter ratio of 5% with smooth rounded edges and arranged in a staggered form. The study is concerned about low Reynolds number flow of Reτ ≅ 180, which corresponds to mean Reynolds number Rem ≅ 5600. The drag and heat transfer parameters for the different dimples' geometries proposed, circular, elliptical, diamond, and teardrop with vertex pointed upstream and downstream, show enhancement in heat transfer on dimpled walls for all geometries of up to 16% and for the whole channel of up to 8.5%. This enhancement in heat transfer was accompanied by an overall drag reduction for all geometries of up to 7.7% except for the circular dimple, which produced a drag increase of about 4.9%. The overall efficiency represented in area/volume goodness factors showed the superiority of all dimple geometries compared to the flat channel." @default.
- W4225727720 created "2022-05-05" @default.
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- W4225727720 date "2022-01-01" @default.
- W4225727720 modified "2023-10-17" @default.
- W4225727720 title "NUMERICAL INVESTIGATION OF HEAT TRANSFER AND DRAG OVER DIFFERENT DIMPLE GEOMETRIES IN TURBULENT CHANNEL FLOW" @default.
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- W4225727720 doi "https://doi.org/10.1615/jenhheattransf.2022041456" @default.
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