A new approach to determine the concentration distribution in slurry transport

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Abstract

Most concentration distribution models are based on the advection diffusion equation for two-dimensional (2D) channel flow. These models may or may not incorporate hindered settling based on the cross-sectional averaged spatial volumetric concentration. These models also use a diffusivity based on the turbulent momentum diffusivity, sometimes corrected for the particle diameter (Kaushal & Tomita (2000)). The result is a 2D concentration profile. To make this applicable for pipe flow, the integrated concentration profile must match the cross-sectional averaged spatial volumetric concentration, which requires a correction. Still the result is based on a constant hindered settling velocity, which is not correct considering the concentration over the vertical coordinate is not a constant. An iterative method has been developed to correct the concentration profile for the local hindered settling velocity. About 4 iterations are necessary to find the resulting concentration profile.
Original languageEnglish
Title of host publicationProceedings Dredging Summit and Expo 2017
EditorsDonald F. Hayes
Place of PublicationBonsall, CA, USA
PublisherWestern Dredging Association
Pages189-203
Publication statusPublished - 2017
EventWEDA Dredging Summit & Expo 2017 - Vancouver, Canada
Duration: 26 Jun 201729 Jun 2017

Conference

ConferenceWEDA Dredging Summit & Expo 2017
CountryCanada
CityVancouver
Period26/06/1729/06/17

Keywords

  • Dredging
  • Newtonian settling slurry transport
  • concentration profile

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