Unsteady Stratified Circulation in a Cavity

by Der-Liang Young, Research Assoc.; School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y.,
Richard H. Gallagher, (F.ASCE), Prof.; School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y.,
James A. Liggett, (M.ASCE), Prof.; School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y.,


Serial Information: Journal of the Engineering Mechanics Division, 1976, Vol. 102, Issue 6, Pg. 1009-1023


Document Type: Journal Paper

Abstract: A transient two-dimensional model with idealized topography (i.e., cross section of a rectangular lake) is examined using numerical models. The primary results define the behavior of the circulation and temperature distribution under a variety of circumstances. It is demonstrated that multiple circulation cells are likely to form in a basin with a broad and diffusive metalimnion, a strong and stable density stratification, and a modest wind stress. The present model is able to predict the formation, maintenance, and erosion of thermocline. The wind-driven current is observed to play a striking role in the development of thermocline. The current accelerates the establishment and contributes to the erosion of thermocline, which is in contrast to the one-dimensional pure diffusion model in which the circulation plays no role.

Subject Headings: Two-dimensional models | Numerical models | Structural models | Temperature distribution | Diffusion (thermal) | Wind engineering | Erosion | Transient response

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