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	Shallow sediment transport flow computation using time-varying sediment adaptation length
	Jaan Hui PU ; Khalid HUSSAIN ; Song-dong SHAO ; Yue-fei HUANG ; Jaan Hui PU ; Khalid HUSSAIN ; Song-dong SHAO ; Yue-fei HUANG
	2016-03-30 ; 2016-03-30
关键词	Finite volume model Harten Lax van Leer-contact solver Monotonic upwind scheme Sediment transport Shallow water model Time-varying sediment adaptation length TV14
其他题名	Shallow sediment transport flow computation using time-varying sediment adaptation length
中文摘要	Based on the common approach,the adaptation length in sediment transport is normally estimated astemporally independent.However,this approach might not be theoretically justified as the process of reaching the sediment transport equilibrium stage is affected by the flow conditions in time,especially for fast moving flows,such as scour-hole developing flows.In this study,the two-dimensional(2D) shallow water formulation together with a sediment continuity-concentration(SCC) model were applied to flow with mobile sediment boundary.A timevarying approach was proposed to determine the sediment transport adaptation length to simulate the sediment erosion-deposition rate.The proposed computational model was based on the Finite Volume(FV) method.The Monotone Upwind Scheme of Conservative Laws(MUSCL)-Hancock scheme was used with the Harten Lax van Leer-contact(HLLC) approximate Riemann solver to discretize the FV model.In the flow applications of this paper,a highly discontinuous dam-break,fast sediment transport flow was used to calibrate the proposed timevarying sediment adaptation length model.Then the calibrated model was further applied to two separate experimental sediment transport flow applications documented in the literature,i.e.a highly concentrated sediment transport flow in a wide alluvial channel and a sediment aggradation flow.Good agreement with the experimental data were obtained with the proposed model simulations.The tests prove that the proposed model,which was calibrated by the discontinuous dam-break bed scouring flow,also performed well to represent rapid bed change and steady sediment mobility conditions.; Based on the common approach,the adaptation length in sediment transport is normally estimated astemporally independent.However,this approach might not be theoretically justified as the process of reaching the sediment transport equilibrium stage is affected by the flow conditions in time,especially for fast moving flows,such as scour-hole developing flows.In this study,the two-dimensional(2D) shallow water formulation together with a sediment continuity-concentration(SCC) model were applied to flow with mobile sediment boundary.A timevarying approach was proposed to determine the sediment transport adaptation length to simulate the sediment erosion-deposition rate.The proposed computational model was based on the Finite Volume(FV) method.The Monotone Upwind Scheme of Conservative Laws(MUSCL)-Hancock scheme was used with the Harten Lax van Leer-contact(HLLC) approximate Riemann solver to discretize the FV model.In the flow applications of this paper,a highly discontinuous dam-break,fast sediment transport flow was used to calibrate the proposed timevarying sediment adaptation length model.Then the calibrated model was further applied to two separate experimental sediment transport flow applications documented in the literature,i.e.a highly concentrated sediment transport flow in a wide alluvial channel and a sediment aggradation flow.Good agreement with the experimental data were obtained with the proposed model simulations.The tests prove that the proposed model,which was calibrated by the discontinuous dam-break bed scouring flow,also performed well to represent rapid bed change and steady sediment mobility conditions.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144939]
专题	清华大学
推荐引用方式 GB/T 7714	Jaan Hui PU,Khalid HUSSAIN,Song-dong SHAO,et al. Shallow sediment transport flow computation using time-varying sediment adaptation length[J],2016, 2016.
APA	Jaan Hui PU.,Khalid HUSSAIN.,Song-dong SHAO.,Yue-fei HUANG.,Jaan Hui PU.,...&Yue-fei HUANG.(2016).Shallow sediment transport flow computation using time-varying sediment adaptation length..
MLA	Jaan Hui PU,et al."Shallow sediment transport flow computation using time-varying sediment adaptation length".(2016).

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