A DNS investigation of non-newtonian turbulent open channel flow

Raymond Guang, Murray Rudman, Andrew Chryss, Paul Slatter, Sati Bhattacharya

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The flow of non-Newtonian fluids in open channels has great significance in many industrial settings from water treatment to mine waste disposal. The turbulent behaviour during transportation of these materials is of interest for many reasons, one of which is keeping settleable particles in suspension. The mechanism governing particle transport in turbulent flow has been studied in the past, but is not well understood. A better understanding of the mechanism operating in the turbulent flow of non-Newtonian suspensions in open channel would lead to improved design of many of the systems used in the mining and mineral processing industries. The objective of this paper is to introduce our work on the Direct Numerical Simulation of turbulent flow of non-Newtonian fluids in an open channel. The numerical method is based on spectral element/Fourier formulation. The flow simulation of a Herschel-Bulkley fluid agrees qualitatively with experimental results. The simulation results over-predict the flow velocity by approximately 15% for the cases considered, although the source of the discrepancy is difficult to ascertain. The effect of variation in yield stress and assumed flow depth are investigated and used to assess the sensitivity of the flow to these physical parameters. This methodology is seen to be useful in designing and optimising the transport of slurries in open channels. © 2010 American Institute of Physics.

Original languageEnglish
Title of host publicationThe 10th Asian International Conference on Fluid Machinery
Subtitle of host publicationKuala Lumpur, Malaysia, 21-23 October 2010 [Proceedings]
EditorsMazlan Abdul Wahid, Jamaluddin Sheriff, Nor Azwadi Che Sidik, Syahrullail Samion
Place of PublicationMelville, New York
PublisherAmerican Institute of Physics
Pages179 - 184
Number of pages6
ISBN (Print)9780735407695
Publication statusPublished - 2010
Externally publishedYes
Event10th Asian International Conference on Fluid Machinery, AICFM - Kuala Lumpur, Malaysia
Duration: 21 Oct 201023 Oct 2010

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference10th Asian International Conference on Fluid Machinery, AICFM
CityKuala Lumpur


  • Direct numerical simulation
  • Non-Newtonian flow
  • Open channel flow
  • Turbulence simulation

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