A numerical model is developed of the mising in stratified flows based on the finite volume solution of the incompressible Navier- Stokes equation for a heterogeneous fluid, the continuity equation and the transport equation for solute.. To incorporate the effects of small density difference on the flow field into the model with some degree of accuracy, the density variation relative to the characteristic censity difference is used as one of primative variables. The discretisation used holds the conservative property with respect to mass for the governing equations as well as the boundary conditions. The two-dimensional computation of mxing in a stratified cavity flow by a vertical circulation penetrating into the region of constant density gradient is carried out to validate the numerical model by comparing with previous experiments. It is found that this model reproduces the deepening processes of a mixed layter in qualitative agreement with the visualization experiments in which a density interface formed by erision of the basic density gradient suppresses the primary circulation to pentrate it. The effects of diffusivity of solute on the characterstics of the mixed layer and the stratified layer are investigated to estimate the mising rate across the density interface.

  • Supplemental Notes:
    • J Kansai Soc Naval Arch, n 223, March 1995, p 169 [6 p, 7 ref]
  • Authors:
    • Baba, N
    • Kumura, N
    • Takamatsu
    • K-i
  • Publication Date: 1995


  • Japanese

Subject/Index Terms

Filing Info

  • Accession Number: 00710982
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM