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- W4295093176 endingPage "105738" @default.
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- W4295093176 abstract "Supercritical flow through a horizontal pipe leads to a non-uniform peripheral wall temperature distribution even when the wall heat flux is kept constant and uniform. This is attributed to lower heat transfer coefficient at the top section where the denser fluid tends to sink. Hence, to obtain a uniform wall temperature, a designed wall roughness is devised. Uniform sand-grain roughness is employed to only partly cover the top half of the pipe wall. Numerical simulations were conducted using the SST k−ω turbulence model. The simulation results indicate that our proposed design can lead to a more uniform heat transfer distribution over the wall periphery compared with the smooth pipe. An extreme case was also considered where the inner wall was completely covered with roughness elements. While heat transfer augmentation was observed for this case, the excess pressure drop was prohibitively higher compared with a pipe with designed wall roughness." @default.
- W4295093176 created "2022-09-10" @default.
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- W4295093176 date "2022-11-01" @default.
- W4295093176 modified "2023-10-12" @default.
- W4295093176 title "A designed wall roughness approach to improve turbulent heat transfer to supercritical CO2 flowing in horizontal tubes" @default.
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- W4295093176 doi "https://doi.org/10.1016/j.supflu.2022.105738" @default.
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