Velocity distribution in a gradually accelerating free surface flow
العنوان: | Velocity distribution in a gradually accelerating free surface flow |
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المؤلفون: | Guo-Liang Yu, Wei-Lin Xu, Shu-Qing Yang |
المصدر: | Advances in Water Resources. 29:1969-1980 |
بيانات النشر: | Elsevier BV, 2006. |
سنة النشر: | 2006 |
مصطلحات موضوعية: | Physics::Fluid Dynamics, Physics, Momentum, Drift velocity, Classical mechanics, Thermal velocity, Free surface, Flow (psychology), Shear stress, Group velocity, Shear velocity, Mechanics, Water Science and Technology |
الوصف: | This study investigates the interaction of the vertical velocity v and the streamwise velocity u in a gradually accelerating flow. The analytical result shows that the momentum of uv driven by the mean velocities in a non-uniform flow is not negligible. This additional momentum directly results in the concave profiles of Reynolds shear stress in gradually accelerating flows, a departure from the expected linear profile. Consequently, this momentum causes the maximum velocity to be located below the free surface, i.e., the dip-phenomenon. This paper investigated the interactions of the Reynolds shear stress, non-zero vertical velocity and dip-phenomenon, it is found that the non-zero vertical velocity causes the dip-phenomenon. The approach is tested using the experimental data of Song and others, and good agreements between the predicted and measured velocity profiles have been achieved. |
تدمد: | 0309-1708 |
الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::d584a5134dcaefabab068c8963ed0267Test https://doi.org/10.1016/j.advwatres.2006.02.002Test |
حقوق: | CLOSED |
رقم الانضمام: | edsair.doi...........d584a5134dcaefabab068c8963ed0267 |
قاعدة البيانات: | OpenAIRE |