0
RESEARCH PAPERS

Dynamics of Mixed Layer in a Nonuniformly Stratified Fluid Heated from Below

[+] Author and Article Information
M. Behnia, R. Viskanta

Heat Transfer Laboratory, School of Mechanical Engineering, Purdue University, West Lafayette, Ind. 47907

J. Sol. Energy Eng 102(2), 134-141 (May 01, 1980) (8 pages) doi:10.1115/1.3266131 History: Received February 19, 1980; Online November 11, 2009

Abstract

Unsteady natural convection in a nonuniformly stratified, finite depth layer of water heated from below has been studied. Laboratory experiments were performed using the Mach-Zehnder interferometer as a diagnostic tool for measuring temperature. A shadowgraph technique was used for flow visualization. A simple thermal and a more detailed two-differential equation k–ε turbulence models are used to predict the dynamics of mixed layer which develops when the thermally stratified fluid is heated from below. The thermal model predictions for the mixed layer height agreed to within 5 percent and the mixed layer temperature to within 15 percent of the experimental data obtained in controlled laboratory experiments. Even better agreement between data and predictions were obtained with the k–ε turbulence model. The entrainment processes at the interface between the mixed layer and the stable region as well as turbulence in the layer must be better understood for more realistic modeling of turbulent natural convection in nonuniformly stratified fluids.

Copyright © 1980 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In