Deposition from Particle-Laden, Plane, Turbulent, Buoyant Jets

Alan J.S. Cuthbertson, David D. Apsley, Peter A Davies, Giordano Lipari, Peter K. Stansby

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

Laboratory and computational fluid dynamics (CFD) model studies with turbulent, plane, particle-laden buoyant jets discharged horizontally into a quiescent ambient fluid have demonstrated that the presence of particles has no significant influence upon the buoyant jet trajectories over a wide range of forcing conditions and source concentrations of 0.1% or less. Bed deposition distributions show a large initial maximum close to the source, indicative of a dominant, localized particle fall-out from the buoyant jet margins. Beyond this near-source region, the distributions show a gradual decrease in particle deposition with increasing distance from the source, as a result of particle fall-out from the spreading surface layer generated by the buoyant jet impinging on the free surface of the receiving waters. In both cases, the deposition distributions scale well with the nondimensional settling parameter w_s/b_0^(1∕3) and the source Froude number F0. CFD simulations show good agreement with the laboratory data, particularly for deposition distributions downstream of the source. Additionally, the simulations indicate clearly that the receiving water boundaries can produce significant secondary return flows through fluid displacement by the spreading surface gravity current and its subsequent reflection.
Original languageEnglish
Pages (from-to)1110-1122
Number of pages13
JournalJournal of Hydraulic Engineering (Reston)
Volume134
Issue number8
DOIs
Publication statusPublished - Aug 2008
Externally publishedYes

Keywords

  • Model analysis
  • Jets (fluid)
  • Turbulent flow
  • Particle size distribution
  • Particles
  • Flow simulation
  • Laboratory tests
  • Computational fluid dynamics technique
  • Free surfaces

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37 Citations (Scopus)
  • Numerical particle tracking studies in a turbulent round jet

    Lipari, G., Apsley, D. D. & Stansby, P. K., 2007, Particle-Laden Flow: From Geophysical to Kolmogorov Scales. Geurts, B. J., Clercx, H. J. H. & Uijttewaal, W. (eds.). Springer, p. 207-219 13 p. (ERCOFTAC Series; vol. 11, no. 11).

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

  • Design and optimization program for internal diffuser hydraulics

    Bleninger, T., Lipari, G. & Jirka, G. H., 16 Sep 2002, Proceedings of 2nd International Conference on Marine Waste Water Discharges. p. 1-15 15 p.

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    Open Access
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