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- W2648223224 abstract "A skin-friction drag in turbulent pipe flow significantly decreases by a pulsating due to a relaminarization. In a straight pipe flow, 63% drag reduction has been obtained experimentally. The purpose of the present study is to investigate the drag reduction effect by the pulsating in a turbulent pipe flow which has a branch. Cycle-averaged friction Reynolds number is set to be 200 before the branch. Flow rates at main and sub branches are set to be equal. Before the branch, the branch does not effect to the drag reduction effect. After the branch, the drag reduction effect is obtained when the input parameters nondimensionalized by the local friction Reynolds number and a mean pressure gradient averaged for an acceleration phase are set to be those in the pipe flow without the branch. With die branch 19% drag reduction is obtained after the branch and 22% drag reductions is obtained after the branch, simultaneously." @default.
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- W2648223224 date "2013-01-01" @default.
- W2648223224 modified "2023-10-16" @default.
- W2648223224 title "20704 Friction-Drag Reduction Effect in Pulsating Turbulent Pipe Flow with a Branch" @default.
- W2648223224 doi "https://doi.org/10.1299/jsmekanto.2013.19.367" @default.
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