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Thursday, July 30, 2020 | History

3 edition of Damping of quasi-stationary waves between two miscible liquids found in the catalog.

Damping of quasi-stationary waves between two miscible liquids

Damping of quasi-stationary waves between two miscible liquids

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  • 27 Currently reading

Published by National Aeronautics and Space Administration, Glenn Research Center, Available from NASA Center for Aerospace Information in [Cleveland, Ohio], Hanover, MD .
Written in English

    Subjects:
  • Fluid dynamics.,
  • Interfacial instability.,
  • Microgravity.,
  • Quasi-stationary waves.,
  • Miscible liquids.

  • Edition Notes

    StatementWalter M.B. Duval.
    SeriesNASA/TM -- 2002-211694., NASA technical memorandum -- 211694.
    ContributionsNASA Glenn Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL16106783M

      Cite this article. Nakoryakov, V.E., Dontsov, V.E. Pressure-wave damping in a liquid with bubbles produced by two kinds of gases. by: 1. The degree of mechanical damping was found to correlate with the viscosity of the core PEGs and is discussed in terms of the interactions between the core and sheath during mechanical oscillation. In addition, the nonwoven fiber mats were tested for auditory sound attenuation (e.g., white noise, pink noise, frequency steps, and chirps).Author: Michael J. Bertocchi, Michael J. Bertocchi, Pearl Vang, Robert B. Balow, James H. Wynne, Jeffrey G.

    For the latter, Morra and Yuen 19 discussed recently the important role of stresses at miscible interfaces in geodynamics, where they have implications in mantle convection, earthquakes, magma fragmentation and the dynamics of the earth core. 20 A transient surface tension between two miscible phases appears also as a necessary input in the Cited by: Chemical Engineering Science, , Vol. 30, pp. Pergamon Press. Printed in Great Britain APPLICATION OF LONGITUDINAL WAVE THEORY TO DESCRIBE INTERFACIAL INSTABILITY J. H. GOUDA and P. JOOS* Unilever Research Vlaardingen, The Netherlands (Received 23 October ) Abstract-The onset of interfacial instability due to solute transfer between two inmiscible liquid Cited by:

    Superimposed liquids, the lighter one on top, exposed to horizontal vibrations, develop a saw-tooth-like pattern called “frozen waves.” These are subject to conditions similar to those of dynamic stabilization and, if miscible, thus can also only be maintained for a certain by: 9. Antinode. the point of maximum displacement midway between two nodes in a standing wave. Interference. the interaction of two or more waves that combine in a region of overlap. Constructive Interference. the interaction among two or more waves in which displacements combine to produce a wave with a larger displacement.


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Damping of quasi-stationary waves between two miscible liquids Download PDF EPUB FB2

Causes growth of quasi-stationary (q-s) waves at the interface between the two liquids. We examine We examine computationally the dynamics of a four-mode q-s wave. Two viscous miscible liquids with an initially sharp interface oriented vertically inside a cavity become unstable against oscillatory external forcing due to Kelvin-Helmholtz instability.

The instability causes growth of quasi-stationary (q-s) waves at the interface between the two liquids. We examineFile Size: KB. Damping of quasi-stationary waves between two miscible liquids (OCoLC) Online version: Duval, Walter M.

Damping of quasi-stationary waves between two miscible liquids (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: United States. Damping of quasi-stationary waves between two miscible liquids (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: Walter M B Duval; NASA Glenn Research Center,; United States.

National Aeronautics and. Damping of quasi-stationery waves between two miscible liquids nasa/tm national aeronautics and space administration j (OCoLC) Online version: Duval, Walter M.B.

Damping of quasi-stationary waves between two miscible liquids (OCoLC) Material Type. The instability causes growth of quasi-stationary (q-s) waves at the interface between the two liquids. We examine computationally the dynamics of a four-mode q-s wave. Duval currently works at the Fluid Physics and Transport Processes Branch at NASA Glenn.

Damping of Quasi-Stationary Waves Between Two Miscible Liquids. A contact of two miscible liquids (two components of a binary mixture) initiates a mixing process that in general includes the diffusive mass transfer and the generation of hydrodynamic flows.

As a result of the mixing an initial non-equilibrium state of a binary mixture is transformed into a state of thermodynamic by:   Damping refers to the force that limits the amplitude of a vibration - a simple harmonic oscillation. The solution to a second order differential equation without a first order term is constant amplitude simple harmonic motion.

We consider a wave equation with an internal damping represented by a fractional derivative of lower order than one. An exponential growth result is proved in presence of a source of polynomial type.

Full text of "Nonlinear Dynamics of a Diffusing Interface" See other formats NASA/TM— AIAA Nonlinear Dynamics of a Diffusing Interface Walter M.B.

Duval Glenn Research Center, Cleveland, Ohio October The NASA STI Program Office in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space. Excitation of two miscible-viscous liquids inside a bounded enclosure in a microgravity environment has shown the evolution of quasi-stationary waves of various modes.

JOURNAL OF DIFFERENTIAL EQUATI () The Effect of Boundary Damping for the Quasilinear Wave Equation J. GREENBERG* Department of Mathematics, Ohio State University, Columbus, Ohio AND Li TA TSIEN Department of Mathematics, Fudan University, Shanghai, China Received J ; revised September 8, by: Quasi-stationary density wave theory.

In the late s and s the problems of maintaining quasi-stationary spiral density waves were emerging, and the WASER mechanism/ swing amplification proposed to maintain standing waves in the disc.

Gravity waves were generated at the interface between miscible fluids, or at the top of a settling suspension or a fluidized bed. For these three systems the dispersion relation was measured and compared to the theory and calculated between two buoyant viscous fluids without surface tension.

The experimental. Numerical simulations of large-amplitude internal solitary waves - Volume - DMITRY E. TEREZ, OMAR M. KNIOCited by: The principal effect of damping is to reduce the amplitude of an oscillation, not to change its frequency.

So, the graph of the amplitude of a normal damped oscillation might look like the following: Critical Damping. Critical damping occurs when a system is designed to return an oscillator to its equilibrium position in the least time possible. Global existence of solutions for quasi-linear wave equations with viscous damping Zhijian Yang∗ and Guowang Chen Department of Mathematics, Zhengzhou University, No.

75, Daxue Road, ZhengzhouPR China Received 18 September Submitted by. Recent work has rendered possible the formulation of a rigorous model for the propagation of pressure waves in bubbly liquids.

The derivation of this model is reviewed heuristically, and the predictions for the small‐amplitude case are compared with the data sets of several investigators.

The data concern the phase speed, attenuation, and transmission coefficient through a layer Cited by: Theoretical and Applied Rheology Proceedings of the Xith International Congress On Rheology, Brussels, Belgium, August 17–21, Select ON THE DAMPING FUNCTION OF SHEAR RELAXATION MODULUS FOR POLYMERIC LIQUIDS.

THE SHEAR INSTABILITY IN TWO-LAYER VISCO-ELASTIC LIQUIDS. AKHATOV and I.U. SUBAEV. (7) describes both the modified dispersion law to(k) and the relaxation ~(k). The system of equations for to and ~, which follows from Eq. (7), is complicated enough.

Thus we shall use for its analysis in the vicinity of k = q/2 the approximation method used in Ref. [8] for the case of stochastic coupling between two waves of different by: I review basic results about waves at the interface between a horizontal fluid layer and air at atmospheric pressure or at the interface between two non-miscible fluids.

The restoring mechanisms are mostly gravity and surface tension but coupling with relative fluid motion or with an electric or a magnetic field will also be by: 3.Damping of Quasi-Stationary Waves Between Two Miscible Liquids.

W. Duval, NASA Glenn, Cleveland, OH. Microgravity Science and Space Processing Symposium. John Pojman: Diffuse Interface Problems in Fluid Mechanics and Materials Science.