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Wednesday, August 5, 2020 | History

2 edition of An experimental investigation of the stability of poiseuille flow found in the catalog.

An experimental investigation of the stability of poiseuille flow

by Richard Evans Westbrook

  • 174 Want to read
  • 27 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Mechanical engineering

  • ID Numbers
    Open LibraryOL25129738M

      E. Reshotko, “Experimental study of the stability of pipe flow, I. Establishment of an axially symmetric Poiseuille flow,” Jet Propulsion Lab. Progress Report 20–, Google Scholar; E. W. Mayerand E. Reshotko, “ Evidence for transient disturbance growth in a pipe-flow experiment,” Phys. Fluids 9, (). Google. In the previous work, the stability of spiral Couette flow was studied up to Re= [9, 10]; while this paper extended stability investigation up to Re= It is worthy to note that the applied.

    Takeuchiand D. F. Jankowski, “ A numerical and experimental investigation of the stability of spiral Poiseuille flow,” J. Fluid Mech. , (). Google Scholar Crossref   It is well known that the stability of plane Poiseuille flow is extremely sensitive to small imperfections that are inevitably present. In this paper, a simple model is proposed, in which the imperfections are represented by a steady but spatially periodic surface roughness and a small oscillatory pressure gradient. A steady perturbation in the form of spatially periodic suction is also.

      The flow rate was regulated by using the valve on the reflux line and the tests were repeated at least for 14 flow rates for each concentration. During experimental runs, inlet and outlet temperature of the nanofluid, the tube wall temperature at different positions and the flow rate was measured. Each measurement was repeated at least two times. Results from an experimental investigation on the interaction between a pair of oblique waves in plane Poiseuille flow are presented. Non-linear interaction resulted in a streaky flow structure. For high initial wave amplitude higher harmonics occurred, which finally developed into a turbulent-like state.


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An experimental investigation of the stability of poiseuille flow by Richard Evans Westbrook Download PDF EPUB FB2

An experimental investigation of the stability of plane Poiseuille flow - Volume 72 Issue 4 - M. Nishioka, S. Iid A, Y. IchikawaCited by:   The instability of shear flows, of which the Poiseuille flow is a canonical example, is among the most classical and most challenging problems in fluid mechanics, and a huge amount of effort has been devoted to it (1 –13).The most definitive advance has been the recent experimental work by Avila et al.

(): By measuring the puff decaying and splitting times, they obtained an estimate for the Cited by: 9. The stability of pipe Poiseuille flow to azimuthally periodic disturbances is examined experimentally. The disturbance is generated in the fully developed flow region to avoid extraneous effects of possible entrance flow instability.

A Reynolds number spectrum to above was covered with a frequency range from 13 to 1 kc/sec. The peak disturbance velocity amplitude was maintained at a value Cited by: Pabiou et al. carried out an experimental investigation of the secondary instability of RBP flows for Re b1 ≥ and Ra ≥where Re b1 is based on the bulk velocity and channel height.

One of the cases (R e b 1 = based on channel height or R e b 2 = 87 based on channel half-height and R a = ) from the paper by Pabiou et al. was computed for additional validation of the DNS : Kamrul Hasan, Andreas Gross.

An experimental investigation of the stability of Poiseuille flow J. Fluid Mech. 5, Lessen, M. & Paillet, F. The stability of a trailing line by: Nishioka M, Iida S, Ichikawa Y () An experimental investigation of the stability of plane Poiseuille flow.

J Fluid Mech – ADS CrossRef Google Scholar Orszag SA () Accurate solution of the Orr–Sommerfeld stability equation. The stability of pipe Poiseuille flow to azimuthally periodic disturbances is examined experimentally.

The disturbance is generated in the fully developed flow region to avoid extraneous effects of possible entrance flow instability. A Reynolds number spectrum to above was covered with a frequency range from 1/3 to 1 kc/sec. The peak disturbance velocity amplitude was maintained at a.

The present work is concerned with a numerical and experimental investigation of the linear stability of spiral Poiseuille flow in a wide-gap annulus. The theoretical disturbance is allowed to be three-dimensional, with the proper wavenumbers deter- mined by their correspondence to the minima on numerically generated neutral stability curves.

On the Instability of Plane Poiseuille Flow of Two Immiscible Fluids Using the Energy Gradient Theory - Volume 30 Issue 3 - I. Farahbakhsh, S. Nourazar, H. Ghassemi, H.-S. Dou, A. Nazari-Golshan “ An Experimental Investigation of the Stability of Plane Poiseuille Flow, ” Journal of Fluid Mechanics.

The effect of rigid rotation on the finite-amplitude stability of pipe flow at high Reynolds number. Journal of Fluid Mechanics, Vol. Issue. -1, p. Part 2. Stability of pipe Poiseuille flow to finite axisymmetric disturbances J.

Fluid Iida, S. & Ichikawa, Y. An experimental investigation of the stability of plane. Thus Re = 0 -->- Rar't = (see ref. In the presence of a primary convection (e.g. a Poiseuille flow) the critical Rayleigh number increases with the Reynolds number: the Bard cells are in some sense destroyed by a laminar convection.

The aim of this letter is to give a preliminary experimental result, to confirm the theoretical predictions. Fig. 2, Fig. 3 present results of experimental investigation of flow resistance depending of Reynolds number for water and air flow in three minichannels with internal diameter d =and mm.

The investigations were made in the range of number Re = 30–The flow resistance was expressed with the aid of value (Δp/L), i.e. a water pressure drop referred to the unit of the.

Experimental study on the stability of laminar flow in a channel with streamwise and oblique riblets Such a local and small change in the velocity profile enhanced the instability of the plane Poiseuille flow appreciably. “ Effects of riblets upon flow stability,” Appl.

Sci. Res. 54(4),   The stability of Poiseuille flow is among the most classical problems in fluid mechanics going back to the pioneering work of Reynolds. Despite a huge amount of effort, particularly recent advances in experimental studies, we still lack a suitable theoretical framework.

In this paper, we develop a thermodynamic formalism for studying this problem. An approach to Poiseuille's law in an undergraduate laboratory experiment. Laminar Couette-Poiseuille flow (CP) existed at Ta = 94 over the whole interval of investigated Re. Esser and Grossmann calculated a critical number of Ta c = for the stability of the Couette flow (Re = 0) and Recktenwald et al.

gave Ta c = and for Re = 0 respectively. Taylor vortex flow (TV) means the standard toroidal. The available results demonstrate flow destabilization due to the presence of wall waviness. The reduction of the critical Reynolds number agrees with the theoretical predictions.

ka, S. Iida, and wa, "An experimental investigation of the stability of plane Poiseuille flow. Hasan, M.K., and Gross, A., "Numerical Investigation of Hydrodynamic Stability of Inward Radial Rayleigh-Bénard-Poiseuille Flow," AIAA-Paper AIAA  First, spectral characteristics of the Hagen–Poiseuille flow stability problem are compared with those of the discrete linearized Navier–Stokes operator.

Secondly, the results of direct Navier–Stokes simulation of all stages of laminar-turbulent transition in a circular pipe at Reynolds number of are presented. adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A.

Superposed plane Poiseuille flow of an incompatible polymer system consisting of polypropylene and high‐density polyethylene has been investigated. Using the apparatus and procedures developed in our previous study [G. M. Wilson and B. Khomami J. Non‐Newt. Fluid Mech.

45, ()], we have investigated the role of elasticity in interfacial stability, the existence of subcritical and.Laminar Boundary-Layer Oscillations and Stability of Laminar Flow. Experimental investigation on the steady and unsteady disturbances in a flat plate boundary layer.

Note on Discrepancies between Two Theories on the Stability of Plane Poiseuille Flow. Journal of .1: Opening session.- Dialogue on Progress and Issues in Stability and Transition Research.- Experimental Investigation of Tollmien Schlichting Instability and Transition in Similar Boundary Layer Flow in an Adverse Pressure Gradient.- On the Development of Turbulent Spots in Plane Poiseuille Flow