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Wednesday, August 5, 2020 | History

2 edition of laboratory study of localized boundary mixing in a rotating stratified fluid found in the catalog.

laboratory study of localized boundary mixing in a rotating stratified fluid

Judith R. Wells

laboratory study of localized boundary mixing in a rotating stratified fluid

by Judith R. Wells

  • 248 Want to read
  • 15 Currently reading

Published by Massachusetts Institute of Technology, Woods Hole Oceanographic Institution in Cambridge, Mass, Woods Hole, Mass .
Written in English

    Subjects:
  • Oceanic mixing -- Mathematical models.,
  • Rotating masses of fluids -- Mathematical models.,
  • Turbulence -- Mathematical models.

  • Edition Notes

    Other titlesLocalized boundary mixing in a rotating stratified fluid.
    Statementby Judith R. Wells.
    SeriesMIT/WHOI -- 2003-01., MIT/WHOI (Series) -- 2003-01.
    ContributionsJoint Program in Oceanography/Applied Ocean Science and Engineering., Massachusetts Institute of Technology., Woods Hole Oceanographic Institution.
    The Physical Object
    Pagination148 p. :
    Number of Pages148
    ID Numbers
    Open LibraryOL16053281M

    This paper describes a laboratory study on the evolution of a point turbulent plume placed at the free surface of a homogeneous fluid layer in the presence of background rotation. It is shown that the plume initially evolves as if there is no rotation. However, the rotational effects become important after the plume descends a vertical distance h c1 ≈(B/Ω 3) 1/4 for a normalized Cited by: a rotating-disk boundary-layer flow 55 Paper 2. An Experimental Study of Edge E↵ects on Rotating-Disk Transition 71 Paper 3. Secondary Instability and Turbulent Breakdown of the Rotating-Disk Flow 93 Paper 4. An Experimental Study of a Rotating-Disk Turbulent Boundary-Layer Flow viii.

      We study fully resolved motion of interacting swimmers in density stratified fluids using an archetypal swimming model called “squirmer”. The Cited by: General Curriculum Vitae. For Non-Specialist. Jörg Imberger. December Note: This version of the CV is written for the non-specialists. Please give me a call on +61 (0) or send me an email to [email protected] or [email protected] if. you would like any of the following.

    A laboratory study and direct numerical simulation (DNS) of far wake flow in a stratified fluid are performed. The laboratory study employs the PIV technique to measure the velocity field in a wake behind a towed sphere at high Reynolds and Froude numbers. The DNS parameters and initialization are. (Continued) An experimental/numerical study of internal wave transmission across an evanescent level / B.R. Sutherland and P.F. Linden --The temporal evolution of the boundary layer in a rotating stratified fluid / R.E. Hewitt, P.W. Duck and M.R. Foster --The use of particle image velocimetry for the measurement of the effect of post breaking.


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Laboratory study of localized boundary mixing in a rotating stratified fluid by Judith R. Wells Download PDF EPUB FB2

Oceanic observations indicate that abyssal mixing is localized in regions of rough topography. How locally mixed fluid interacts with the ambient fluid is an open question. Laboratory experiments explore the interaction of mechanically induced boundary mixing and an interior body of linearly stratified rotating by: 5.

The strength of diapycnal mixing by small-scale motions in a stratified fluid is investigated through changes to the mean buoyancy profile. We study the mixing in laboratory experiments in which an initially linearly stratified fluid is stirred with a rake of vertical bars.

The flow evolution. Abstract. We study the convective overturning of a rotating stratified fluid in the laboratory.

Convection is induced from the surface of a salt-stratified fluid by the introduction of salty fluid over a circular area. The external parameters are buoyancy forcing of strength, B0, applied over a circular area of radius R•, the rotation rate as.

This communication discusses the importance of obtaining a deeper understanding of the interaction of jets having both lateral and vertical shear with complex topography in rotating and stratified fluid environments.

The principal focus is on laboratory experiments for which source-sink methods for mechanically-generating such flows are : D.

McGuinness, X. Zhang, D. Boyer. Stratified fluid. A stratified fluid may be defined as the fluid with density variations in the vertical direction.

For example, air and water; both are fluids and if we consider them together then they can be seen as a stratified fluid system. Density variations in the atmosphere profoundly affect the motion of water and air.

Turbulent convection induced by heating the bottom boundary of a horizontally homogeneous, linearly (temperature) stratified, rotating fluid layer is studied using a. Abstract Laboratory experiments on mixing in stratified fluids are examined in the light of some simple energy arguments applied to an analysis of mixing at density interfaces.

It is shown that as the stability of the flow, as measured by an overall Richardson number Rio, increases, the velocity interface becomes considerably thicker than the density by:   A stably stratified fluid is one in which the fluid density increases with depth.

A characteristic of a stably stratified fluid is the ability to support and propagate wave motions. Except for a relatively thin layer in contact with the Earth's surface, i.e., the planetary boundary layer, the atmosphere is almost always stably stratified, and it is reasonable to assume that it.

Request PDF | Laboratory Studies of Orographic Effects in Rotating and Stratified Flows | This article reviews some aspects of the roles that laboratory experiments have played in. A second reason is that laboratory studies may be more easily pursued in one of the two systems and experimental information pertinent to the other may thereby be obtained.

Yih (28) includes a chapter on rotating fluids in his book on stratified flow and points oui the analogy between stratified fluids and rotating fluids.

BOUBNOV B. and G. GOLITSYN () Experimental study of convective structures in rotating fluids. Journal of Fluid Mechanics,Convectively driven mixed layer growth COATES M.

J., G. IVEY and J. TAYLOR () Unsteady turbulent convection into a rotating stratified fluid: modelling deep by:   This is a review of laboratory studies of mixing in stably stratified fluids away from the direct intluence of boundary layers, and was written to introduce the session on laboratory experiments at the IUCRM Colloquium.

Internal waves (Section 2) can lead to turbulence by creating regions of unstable density gradients through their mutual interactions, by individually Cited by: Instabilities and waves on a columnar vortex in a strongly stratified and rotating fluid Phys.

Flu (); / Elliptical instability of a rapidly rotating, strongly stratified fluid Phys. Flu (); / Nonaxisymmetric effects of stratified spin-up in an axisymmetric annular channel.

Roullet, G. & Klein, P. Available potential energy diagnosis in a direct numerical simulation of rotating stratified turbulence. Fluid Mech. 45 – Cited by: This volume collects numerous recent advances in the study of stratified fluids. It includes analytical and experimental work from a wide range of fields, including meteorology, limnology, oceanography, and the study of estuarine processes.

It also includes fundamental research on stratified and rotating fluid dynamics. A compendium of current work, the book is an ideal. The results of a laboratory experiment designed to study turbulent entrainment at sheared density interfaces are described.

A stratified shear layer, across which a velocity difference Δ U and buoyancy difference Δ b is imposed, separates a lighter upper turbulent layer of depth D from a quiescent, deep lower layer which is either homogeneous (two-layer case) or linearly stratified Cited by: In view of the barotropic fluid and stratified fluid model, the KdV and mKdV equation are also generated to describe the generation and evolution of Rossby solitary waves by Redekopp [3].

(2 + 1)-Dimensional Coupled Model for Envelope Rossby Solitary Waves. Thermally dri−en motions in a rotating stratified fluid stratified flows can eliminate the need for the Ekman layers by allowing the inviscid interior flow to satisfy the no-slip boundary condition directly.

This is described more completely in “3 but a principal result of the present study is the demonstration of this.

Wake, G.W., Gula, J. and Ivey, G.N. () Periodic forcing of baroclinic basin-scale waves in a rotating stratified basin. 15th Australasian Fluid Mechanics Conference, The University of Sydney, December CD Rom: AFMC mixing boxes to study turbulent flows devoid of particles the reader is referred to Fernando [6].

In almost all previous experiments the grid of bars has been positioned in the interior of the fluid in order to study the effects of turbulent motions generated by processes far from a solid boundary.

In stably stratified shear flows, turbulent mixing is suppressed by the background stratification. This project will examine this dynamic using laboratory experiments and field measurements in strongly thermally stratified Australian rivers.

- Research Supervisor Connect - University of Sydney, Australia.laboratory-based experiments []. Mixing LNG by a jet issued from a nozzle mounted on the tank wall is considered to a promising technique to prevent and eliminate stratification in LNG storage tanks.

The current authors [7] performed a laboratory-based experiment of two-layer density-stratified fluid in a rectangular tank.

A two-layer salt-stratified tank of water was mixed by turbulence generated by many excursions of a horizontally moving vertical rod. The objective is to observe the time-dependent response of the mean density field for ranges of Richardson number Ri > and Reynolds Number Re > As the density profile of the fluid gradually evolves from a single Cited by: 4.