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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Three-dimensional numerical simulation of flow movement in bend inserting thetransition curve
Three-dimensional numerical simulation of flow movement in bend inserting thetransition curve
Author : YAN PEI[1],WEI BINGQIAN[2] ,LIU RUI[3] &PANG JIE[4]
ABSTRACT
The study on bend flow has an important significance to the development of rivers, sediment protection and river evolution.
If the numerical simulation can be effectively used to reveal the law of flow and scouring and silting on the surface, it will
save a lot of manpower, financial resources and time. In this study, two kinds of curves are examined: slow-round-slow
bend and symmetric convex curves, which can be introduced in order to decrease the impact force of the current and to
prevent scouring along the river bed, dike and feet of the dike. Through numerical analysis some results are concluded: the
ultra-high and horizontal surface slope of the slow-round-slow bend and symmetric convex curves are significantly reduced
compared with the round bend; in addition to the corner imports, such as on a cave bank, the bottom velocity of
slow-round-slow bend and symmetric convex curves is less than that of the round bend, convex bank of imports and
cornering near the top cross-section, the flow velocity near the bottom of these two bends is significantly smaller than that
of the round bend; and, the deep groove of these two inserted with graded curves is obviously shallower than the round
bend from the figure of vertical and horizontal erosion and deposition on the bed surface.
File Size : 808,499 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 27/08/2015
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