Effect of thickness of planar nozzles on erosion depth of levee soils subjected to plunging water

Chung Rak Song, Jinwon Kim, James Tyler Kidd, Alexander Cheng, David Admiraal

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the effect of the thickness of a planar jet on the erosion depth when the jet impinges on a surface composed of cohesive soil was analytically and numerically evaluated. The results showed that the erosion depth was practically independent of the nozzle thickness for erosion depths shallower than the potential core length (i.e. the region of the jet in which the central flow velocity is the same as the nozzle velocity). The relation between nozzle thickness and erosion depth was non-linear with continuously variable slope for erosion depths deeper than the potential core length. Finally, the relation was approximately linear when the erosion depth converged to the equilibrium erosion depth. The findings of this study indicate that direct and fast prediction of the erosion depth in the field is possible using the data from a small scale soil erosion test with similar flow velocities.

Original languageEnglish (US)
Pages (from-to)243-249
Number of pages7
JournalInternational Journal of Sediment Research
Volume33
Issue number3
DOIs
StatePublished - Sep 2018
Externally publishedYes

Keywords

  • Erosion depth
  • Levee erosion
  • Nozzle thickness
  • Planar nozzle
  • Plunging water

ASJC Scopus subject areas

  • Geology
  • Stratigraphy

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