Second-Moment Closure Predictions of Buoyant Jets in Neutral and Stratified Cross-Flows

  • A. D. Gosman
  • R. Liu
  • J. J. McGuirk
Conference paper


The paper considers the problem of the modelling of scalar mixing in buoyant jets discharged into neutral and stratified cross-flowing streams via a second-moment closure turbulence model. Emphasis is placed on the near-field where the 3D spatial structure is most complex. Comparisons between k - ε eddy viscosity predictions and calculations where the Reynolds stresses are modelled using the Gibson-Launder stress transport closure (but retaining an eddy diffusivity model for the scalar fluxes) indicate a noticeable improvement in comparison with measured data for the decay of peak mean density excess levels, plume spread and also the variance of density fluctuations. For the case of discharge into a linearly stratified crossflow, the current predictions show a rapid damping of the plume centreline about its equilibrium level, in agreement with measurements, but in contrast to integral models for such flows, which indicate significant oscillations.


Reynolds Stress Computational Fluid Dynamic Model Reynolds Stress Model Moment Closure Scalar Flux 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Hunter, G.C. 1992. The Behaviour of Plumes from Point Sources in Stratified Flows. Ph.D. Thesis, U.K. Council for National Academic Awards.Google Scholar
  2. 2.
    Chen, C.J. and Rodi, W. 1980. Vertical Turbulent Buoyant Jets: A Review of Experimental Data. Pergamon Press, Oxford.Google Scholar
  3. 3.
    Malin, M.R. and Younis, B.A. 1990. Calculation of Turbulent Buoyant Plumes with a Reynolds Stress and Heat Flux Transport Closure. Int. J. Heat and Mass Transfer 33, pp. 2247–2264.CrossRefGoogle Scholar
  4. 4.
    Wright, S.J. 1977. Mean Behaviour of Buoyant Jets in a Crossflow. Proc. ASCE, J. Hydraul. Div. 103, pp. 499–513.Google Scholar
  5. 5.
    Hunter, G.C. 1989. Experimental Investigation of a Buoyant Jet in a Stratified Cross-wind. Proc. of 3rd IMA Conference on Stably Stratified Flows, Leeds.Google Scholar
  6. 6.
    Schatzmann, M. 1979. An Integral Model of Plume Rise. Atmospheric Environment 13, pp. 721–731.CrossRefGoogle Scholar
  7. 7.
    Gibson, M.M. and Launder, B.E. 1978. Ground Effects on Pressure Fluctuations in the Atmospheric Boundary Layer. J. Fluid Mech. 86, pp. 491– 511.Google Scholar
  8. 8.
    McGuirk, J.J. and Papadimitriou, C. 1988. Stably Stratified Free Surface Shear Layers withGoogle Scholar
  9. 9.
    Internal Hydraulic Jumps. In: Stably Stratified Flow and Dense Gas Dispersion, Ed. J.S. Puttock, Clarendon Press, Oxford.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • A. D. Gosman
    • 1
  • R. Liu
    • 2
  • J. J. McGuirk
    • 2
  1. 1.Dept. Mech. Eng.Imperial CollegeLondonUK
  2. 2.Dept. of Transport TechnologyLoughborough UniversityLeicesterUK

Personalised recommendations