Gradient layer entrainment in a thermohaline system with mixed layer circulation

Incropera, F P; Lents, C E; Viskanta, R

doi:10.1115/1.3268105

Title: Gradient layer entrainment in a thermohaline system with mixed layer circulation

Full Record
Other Related Research

Abstract

Entrainment of salt-stratified fluid into a bottom mixed layer is investigated under conditions for which mixing is driven by bottom heating and/or an imposed horizontal flow. Entrainment rate measurements and mixed layer flow visualization suggest that entrainment is strongly influenced by a shear mechanism involving both horizontal and vertical fluid velocity components. Under certain conditions, imposition of the horizontal flow inhibits the buoyancy flow and entrainment rates for combined mixing are less than those for pure buoyant mixing. Attempts to correlate entrainment rates in terms of conventional dimensionless parameters were unsuccessful.

Authors:: Incropera, F P; Lents, C E; Viskanta, R

Publication Date:: Sat Nov 01 00:00:00 EST 1986

Research Org.:: School of Mechanical Engineering, Purdue Univ., W. Lafayette, IN 47907

OSTI Identifier:: 6908117

Resource Type:: Journal Article

Journal Name:: J. Sol. Energy Eng.; (United States)

Additional Journal Information:: Journal Volume: 108:4

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY; SOLAR PONDS; ENTRAINMENT; SALINITY GRADIENTS; FLOW RATE; FLOW VISUALIZATION; HEATING; LAYERS; MIXING; SHEAR; EQUIPMENT; PONDS; SOLAR COLLECTORS; SOLAR EQUIPMENT; SURFACE WATERS; 141000* - Solar Collectors & Concentrators

Citation Formats


                    Incropera, F P, Lents, C E, and Viskanta, R. Gradient layer entrainment in a thermohaline system with mixed layer circulation.  United States: N. p., 1986. 
        Web.  doi:10.1115/1.3268105.

Copy to clipboard


                    Incropera, F P, Lents, C E, & Viskanta, R. Gradient layer entrainment in a thermohaline system with mixed layer circulation.  United States.  https://doi.org/10.1115/1.3268105

Copy to clipboard


                    Incropera, F P, Lents, C E, and Viskanta, R. 1986.  
        "Gradient layer entrainment in a thermohaline system with mixed layer circulation".  United States.  https://doi.org/10.1115/1.3268105.

Copy to clipboard


                    
@article{osti_6908117,

  title        = {Gradient layer entrainment in a thermohaline system with mixed layer circulation},

  author       = {Incropera, F P and Lents, C E and Viskanta, R},

  abstractNote = {Entrainment of salt-stratified fluid into a bottom mixed layer is investigated under conditions for which mixing is driven by bottom heating and/or an imposed horizontal flow. Entrainment rate measurements and mixed layer flow visualization suggest that entrainment is strongly influenced by a shear mechanism involving both horizontal and vertical fluid velocity components. Under certain conditions, imposition of the horizontal flow inhibits the buoyancy flow and entrainment rates for combined mixing are less than those for pure buoyant mixing. Attempts to correlate entrainment rates in terms of conventional dimensionless parameters were unsuccessful.},

  doi          = {10.1115/1.3268105},

  url          = {https://www.osti.gov/biblio/6908117},
  journal      = {J. Sol. Energy Eng.; (United States)},
number       = ,

  volume       = 108:4,

  place        = {United States},

  year         = {Sat Nov 01 00:00:00 EST 1986},

  month        = {Sat Nov 01 00:00:00 EST 1986}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1115/1.3268105

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Gradient layer entrainment correlation for a salt gradient solar pond with storage layer recirculation

Journal Article Munoz, D; Zangrando, F; Viskanta, R; ... - J. Sol. Energy Eng.; (United States)

Experiments were performed in a large tank to determine the effects of combined mixing, due to bottom heating and a horizontal recirculation, on the entrainment of salt stratified fluid. Entrainment rate data obtained for large Richardson numbers were used with existing data for smaller Richardson numbers to develop a single term correlation for the range of 10/sup 2/<10/sup 4/. The appropriate velocity and length scales for the combined mixing experiments were the convective velocity, the square root of the jet kinematic momentum flux divided by the distance from the discharge diffuser to the interface, and the height of the mixedmore » layer.« less
https://doi.org/10.1115/1.3268264
Entrainment of refrigerated air curtains down a wall

Journal Article Field, Brandon; Loth, Eric - Experimental Thermal and Fluid Science

Refrigerated air curtains are used in open supermarket display cases as a barrier between the warm ambient air and the cold refrigerated air. Entrainment of ambient air into the curtain by shear layer mixing contributes to both the sensible and the latent heat load on the display case. To better understand the fluid dynamics which govern entrainment, velocity and temperature measurements of the curtains were made in a refrigerated display case, which was modified to allow a more fundamental flow. In particular, a vertical solid wall was installed to approximately represent a fully-stocked configuration. As such, negatively-buoyant wall jets (withmore »« less
https://doi.org/10.1016/j.expthermflusci.2004.01.012
STUDIES OF TWO-PHASE PLUMES IN STRATIFIED ENVIRONMENTS

Technical Report Socolofsky, Scott; Crounse, Brian; Adams, E

Two-phase plumes play an important role in the more practical scenarios for ocean sequestration of CO{sub 2}--i.e. dispersing CO{sub 2} as a buoyant liquid from either a bottom-mounted or ship-towed pipeline. Despite much research on related applications, such as for reservoir destratification using bubble plumes, our understanding of these flows is incomplete, especially concerning the phenomenon of plume peeling in a stratified ambient. To address this deficiency, we have built a laboratory facility in which we can make fundamental measurements of plume behavior. Although we are using air, oil and sediments as our sources of buoyancy (rather than CO{sub 2}),more »« less
https://doi.org/10.2172/810590

Full Text Available
Turbulent mixing and entrainment in a gravity current

Conference Ecke, Robert; Odier, Philippe; Chen, Jun

We present an experimental study of the mixing processes in a gravity current. The turbulent transport of momentum and buoyancy can be described in a very direct and compact form by a Prandtl mixing length model: the turbulent vertical fluxes of momentum and buoyancy are found to scale quadratically with the vertical mean gradients of velocity and density. The scaling coefficient is the square of the mixing lenth, approximately constant over the mixing zone of the stratified shear layer. We show how, in different flow configurations, this length can be related to the shear length of the flow ({var_epsilon}/{partial_derivative}{sub z}u{supmore »« less
Full Text Available
Numerical simulation of unstably stratified sheared flows

Technical Report Yuan, Sinh-Luh.

A numerical investigation has been performed of three-dimensional instabilities arising in unstably stratified sheared flows. The numerical code developed for the study is the REBUFFS3D (REcirculating BUoyant and Forced Flow Solver-3D) code. It is an extension of the earlier well-tested REBUFFS code developed in Berkeley and includes the improvements embodied in the later Stanford version of the code, REMIXCS (REcirculation MIXed Convection Simulator). Two flow configurations were investigated. In the first, the instabilities are induced by injecting a layer of low density fluid into a co-flowing heavier fluid; in the second, the instabilities are induced by the unstable stratification resultingmore »« less
https://doi.org/10.2172/5292694

Full Text Available

Similar Records