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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Re-thinking of subaqueous gravity flows from the viewpoint of specific energy
Re-thinking of subaqueous gravity flows from the viewpoint of specific energy
Author : HEQING HUANG(1), HAO SUN(1)
ABSTRACT
Subaqueous gravity flows (SGF) including sediment-laden turbidity currents are quite common in nature and are important
both in transporting land materials into lakes, oceans and also in shaping the subaqueous morphology. By checking the
flow thickness versus specific energy curves of SGF undergoing from 0.5 to 10 seven slop transitions for the first time, it
is surprising to find that: i) contrary to popular thinking, SGF on most part of the slope with Froude number larger than
unity are not supercritical; ii) there are two inflection points on the thickness-energy curves, indicating SGF are
supercritical only in short regions around the inlet and slope transitions, something like open channel flows undergoing a
sluice gate; iii) the critical Froude number of those SGF are well above unity corresponding to weaker internal hydraulic
jumps than their cousins in open channel with unity critical Froude number; iv) the higher the slope transition, the wider the
supercritical flow region. These findings may assist us in understanding the mechanisms of some subaqueous topography
relating with subaqueous gravity flows.
File Size : 543,467 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 : 20/08/2015
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