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Tuesday, July 21, 2020 | History

3 edition of Finite length effects in Taylor-Couette flow found in the catalog.

Finite length effects in Taylor-Couette flow

Finite length effects in Taylor-Couette flow

  • 173 Want to read
  • 11 Currently reading

Published by National Aeronautics and Space Administration, Langley Research Center, For sale by the National Technical Information Service in Hampton, Va, [Springfield, Va .
Written in English

    Subjects:
  • Heat -- Transmission.,
  • Navier-Stokes equations.

  • Edition Notes

    StatementC.L. Streett, M.Y. Hussaini.
    SeriesICASE report -- no. 86-59., NASA contractor report -- 178175., NASA contractor report -- NASA CR-178175.
    ContributionsHusaini, M. L., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15377717M

    Taylor—Couette flow was written in by Donald Coles In many respects this paper was the beginning of the modern era in our subject, even though some years were to pass before new activity picked up An important characteristic of Taylor—Couette flow is the ratio of the radii of the cylinders. The aspect ratio is. Finite - Di erence Representa-tion In our solution of equation (22) we will use Crank-Nicolson technique, so discrete representation of that equation can be written 6 as: 4Exacly the same, like in [1]. 5Constans simpli cation also implemented 6That representation is based on central discrete di eren-tial operators. un+1 j = u n j + t 2(y.

    analysis has application beyond Taylor-Couette flow. 1. Introduction The flow between concentric, differentially rotating cylinders, Taylor-Couette flow, exemplifies a class of problems in fluid dynamics involving rotating flows with circularly symmetric boundary conditions. When the outer cylinder is held fixed and. We wish to determine the steady flow pattern set up within the fluid. Incidentally, this type of flow is generally known as Taylor-Couette flow, after Maurice Couette and Geoffrey Taylor (). It is convenient to adopt cylindrical coordinates,,,, whose symmetry axis coincides with the common axis of the two shells.

    applied to a finite-element discretization of the Navier-Stokes equations. In general, the agreement is good and most of the observations are satisfactorily explained. 1. Introduction The importance of end effect's in selecting the steady cellular stat>es of Taylor-Couette flow was recognized by Benjamin (a, b). He used Leray-. Mixing and axial dispersion in Taylor–Couette flows: The effect of the flow regime Marouan Nemria, Sophie Chartona,n, Eric Climentb a CEA, DEN, DTEC, SGCS, F Bagnols-sur-Cèze, France b Institut de Mécanique des Fluides de Toulouse (IMFT) Université de Toulouse, CNRS-INPT-UPS, F Toulouse, France H I G H L I G H T S! Coupled PIV–PLIF Cited by:


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Finite length effects in Taylor-Couette flow Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.

Axisymmetric numerical solutions of the unsteady Navier-Stokes equations for flow between concentric rotating cylinders of finite length are obtained by a spectral collocation method. These representative results pertain to two-cell/one-cell exchange process, and are compared with recent by: 8.

Finite length effects in Taylor-Couette flow. Hampton, Va.: [Springfield, Va: National Aeronautics and Space Administration, Langley Research Center ; For sale by the National Technical Information Service.

MLA Citation. Streett, Craig L. and. Numerical investigations of wavy-vortex flow states were carried out by Jones [20], who computed the stability of the axisymmetric Taylor-Couette flow to non-axisymmetric disturbances for finite gap width; and by Walgraef, Borckmans and Dewel [37], who included finite-length effects in their stability by: In fluid dynamics, the Taylor–Couette flow consists of a viscous fluid confined in the gap between two rotating cylinders.

For low angular velocities, measured by the Reynolds number Re, the flow is steady and purely basic state is known as circular Couette flow, after Maurice Marie Alfred Couette, who used this experimental device as a means to measure viscosity.

The classical Taylor–Couette flow problem assumes infinitely long cylinders, but the finite-length effects which are encountered in real life are more pronounced in cylindrical geometry.

The flow is still unidirectional and the solution for Ω 2 = 0 {\displaystyle \Omega _{2}=0} with cylinder length l {\displaystyle l} using separation of.

Counter-Taylor-Couette Flows: Influence of the Cavity Radius Ratio on the Appearance of Taylor Vortices determine the combined effects of the co - and counter-rotation of the outer cylinder and the radius ratio on the system Keywords Taylor-Couette flow, Rotating cylinders, Taylor vortex, Finite volume method 1.

Introduction. Physical mechanisms governing drag reduction in turbulent Taylor–Couette flow with finite-size deformable bubbles - Volume - Vamsi Spandan, Roberto Verzicco, Detlef Lohse Skip to main content We use cookies to distinguish you from other users and to provide you with a better experience on our by: 8.

The purpose of the present numerical method is to simulate the flow in between two concentric cylinders of finite axial length. The numerical integration of the transient three-dimensional incompressible Navier–Stokes equations is performed by a Legendre spectral element method in space while the time marching scheme is fully by: 3.

Appearance of Taylor Vortices in Taylor Couette Flow. Taylor-Couette Flow (Ultra Laminar Flow) - Smarter Every Day Behind the Scenes - Duration: Smarter Every Day 2 Recommended for you. Couette flow between coaxial cylinders of finite length. The classical Taylor–Couette flow problem assumes infinitely long cylinders, but the finite-length effects which are encountered in real life are more pronounced in cylindrical geometry.

The flow is still unidirectional and the solution for. The combined effects of axial flow and eccentricity on the temporal stability properties of the Taylor-Couette system are investigated using a pseudospectral method. When the length of cylinders is finite, the end walls of cylinders have a great effect on the formation processes of final flow patterns (Benjamin and Mullin, ).

Barenghi and C. Jones enough then the motion of the fluid around the inner cylinder is purely azimuthal and it is called Couette flow. If 0, is larger than a critical velocity SZ, then the Couette flow is unstable: a secondary flow onsets with non-zero values of the radial and axial velocity components; this new flow, called Taylor-vortex flow, is in the form of.

title = "Pressure-driven radial flow in a Taylor-Couette cell", abstract = "A generalized solution for pressure-driven flow through a permeable rotating inner cylinder in an impermeable concentric outer cylinder, a situation used commercially in rotating filtration, is challenging due to the interdependence between the pressure drop in the Cited by: 7.

A numerical investigation is conducted for the flow between two concentric cylinders with a wide gap, relevant to bearing chamber applications. This wide gap configuration has received comparatively less attention than narrow gap journal bearing type geometries. The flow in the gap between an inner rotating cylinder and an outer stationary cylinder has been modelled as an Cited by: 2.

A purely elastic instability in Taylor-Couette flow than YO) of flexible high-molecular-weight polymers seem to be reasonably well described by the simpler three-parameter Oldroyd-B equation, presented shortly.

This equation predicts no shear thinning, and a constant first normal stress coefficient, which is consistent with measurements of dilute-solution propertiesCited by: When studying ferrofluidic flows, as one example of magnetic flow dynamics, in terms of instability, bifurcation, and properties, one quickly finds out the additional challenges magnetic fluids introduce compared to the investigation of “classical”, “ordinary” shear flows without any kind of particles.

Approximation of ferrofluids as fluids including point-size particles or, more Cited by: 1. Taylor-Couette flow refers to the problem of flow between two concentric rotating cylinders as shown in Fig.1 []. ∂H /∂s in unit length along the streamline due to the viscous friction.

In other word, the finite disturbance is needed for the turbulence initiation in the range of finite Re as found in experiments [25]. Connections with open flows are being made.

More complex fluids are used in some experiments. The vigor of the research going on in this particular example of nonequilibrium systems was very apparent at the NATO Advanced Research Workshop on "Ordered and Turbulent Patterns in Taylor­ Couette Flow," held in Columbus, Ohio, USA May.

Experimental and numerical study of Taylor-Couette flow Haoyu Wang Iowa State University Follow this and additional works at: Part of theMechanical Engineering Commons This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State UniversityAuthor: Haoyu Wang.Turbulent Taylor-Couette-Poiseuille flows with a radial thermal gradient () Collaborators: P.

Le Gal, M. Le Bars (IRPHE), S. Viazzo, R. Oguic, S. Haddadi, S. Poncet (Aix-Marseille Univ., M2P2) Funding: Industrial contract with Liebherr Aerospace Toulouse Method: LDV, PIV and temperature measurements, LES based on 4th compact schemes and the WALE model.

describe and characterize the flow instability in Taylor-Couette flow. We also show that plane Couette flow is just the limiting case of Taylor-Couette flow when the curvature of the walls tends to zero.

For flow between concentric rotating cylinders, the flow instability may be induced by rotation of the inner cylinder or the outer Size: KB.