Energy Dissipative Plunging Flows

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题名:	Energy Dissipative Plunging Flows
作者:	Dai, Albert;García, Marcelo H.;M.ASCE
贡献者:	淡江大學水資源及環境工程學系
关键词:	Energy dissipation;Density flow;Lakes;Plunging flow;Reservoirs
日期:	2010-08
上传时间:	2013-06-21 14:19:05 (UTC+8)
出版者:	Reston: American Society of Civil Engineers
摘要:	The analysis of plunging flows using energy dissipation hypothesis is presented in this paper. The classic two-control-volume theory has recently been found questionable and needs to be corrected. In this study, we avoid the questionable part of that framework and use a single control volume for the analysis of plunging flows. Furthermore, we hypothesize that the increase in kinetic energy in the underflow and entrained flow should be no greater than the loss in potential energy as the inflow plunges. In the current framework, the entrained flow rate does not exceed approximately 40% of the total inflow rate. The densimetric Froude number at the plunge point, Fdp=q/√g′H3p, where q=inflow rate per unit width; g′=reduced gravity of inflow; and Hp=flow depth at the plunge point, is typically in the range of 0.3<Fdp<0.6 for plunging flows in a constant width channel.
關聯:	Journal of Hydraulic Engineering 136(8), pp.519–523
DOI:	10.1061/(ASCE)HY.1943-7900.0000176
显示于类别:	[Graduate Institute & Department of Water Resources and Environmental Engineering] Journal Article

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