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• W3209183952 abstract "Abstract An enhancement in heat transfer is the key objective in any thermal system where an efficient cooling is needed. This requirement becomes more important for turbulent flow. A turbulent dual jet is associated with entrainment and mixing processes in several applications. This article aims at enhancing the heat transfer rate by utilizing the wavy surface of a heated plate. Heat transfer and flow characteristics are studied using five low Reynolds-Averaged Navier–Stokes (RANS) turbulence models, namely, Yang and Shih k − ɛ (YS), Launder and Sharma k − ɛ (LS), realizable k − ɛ, renormalization group k − ɛ (RNG), and shear-stress transport k − ω (SST) models. The amplitude of the wavy surface is varied from 0.1 to 0.8 for the number of cycles fixed to 7. The Reynolds number and offset ratio are set to 15,000 and 3, respectively. An isothermal wall condition is used at the wavy wall. An experimental validation has been performed. An enhancement of 55.94% in heat transfer is achieved by the RNG k − ɛ model. Furthermore, it is noticed that the YS model fails to predict the flow separation as the amplitude of the sinusoidal wavy surface increases. However, the SST model reveals that the flow separates when the amplitude increases beyond 0.6. The thermal hydraulic performance (THP) is found to increase for the RNG model by approximately 13.9% for the maximum amplitude considered. As the profiles of the bottom walls change, various turbulence models predict different fluid flow characteristics." @default.
• W3209183952 created "2021-11-08" @default.
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• W3209183952 date "2021-11-23" @default.
• W3209183952 modified "2023-10-11" @default.
• W3209183952 title "Performance Assessment of Different Turbulence Models for a Dual Jet Flowing Over a Heated Sinusoidal Wavy Surface" @default.
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• W3209183952 doi "https://doi.org/10.1115/1.4052854" @default.
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