3 edition of Convective instability of a gravity modulated fluid layer with surface tension variation found in the catalog.
Convective instability of a gravity modulated fluid layer with surface tension variation
1998 by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va .
Written in English
|Statement||J. Raymond Lee Skarda.|
|Series||NASA/TM -- 1998-207941., NASA technical memorandum -- 207941.|
|Contributions||Lewis Research Center.|
|The Physical Object|
A World without Gravity Fluid and Electrolyte Regulation and Blood Components P. Norsk Introduction In order to sustain life, the amounts of water and salt (fluid and electrolytes) in the body are rigorously controlled within narrow limits, despite large fluctuations in intake. Boundary layer transition measurements in hypervelocity flows in a shock tunnel. David Mee; Gravity gas and liquid flows - Simple data for complex problems. John McQuillen and; On the prediction of convective heat transfer coefficients using general-purpose CFD codes. Qunzhen Wang;. Consequently, the surface layer is in tension. is defined as the force per unit length acting normally in the plane of the surface on either side of a line in the surface. It is measured in units of newton meter Sometimes called free surface energy, it may also be defined as the work done in increasing the surface area by a square meter.
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Convective instability of a gravity modulated fluid layer with surface tension variation (OCoLC) Microfiche version: Skarda, J. Raymond Lee. Convective instability of a gravity modulated fluid layer with surface tension variation (OCoLC) Material Type: Document, Government publication, National government publication, Internet.
Get this from a library. Convective instability of a gravity modulated fluid layer with surface tension variation.
[J Raymond Lee Skarda; Lewis Research Center.]. Gravity modulation of an unbounded fluid layer with surface tension variations along its free surface is investigated. In parameter space of (wavenumber, Marangoni number) modulation has a.
American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Effect of Gravity Modulation on the Onset of Ferroconvection in a Densely Packed Porous Layer investigated thermal instability in a layer of ferromagnetic fluid subject to surface tension.
The onset of penetrative Benard–Marangoni ferroconvection in a ferrofluid layer is investigated theoretically via internal heating. The lower rigid surface of the ferrofluid layer is heated from below, while a general thermal condition is used at the upper free surface subjected to a surface tension decreasing with nightcapcabaret.com by: 5.
The Faraday instability in miscible fluid layers is distinct from the immiscible fluid layer case, as it is triggered by the transverse variation of fluid density and is countered by the stabilizing viscous and diffusion processes. The mixing of fluids generated during the evolution of the instability gradually.
Fluid dynamic instabilities: theory and application to pattern forming in complex media Philosophical Transactions of the Royal Society A: Rayleigh–Bénard–Marangoni instability obtained when heating up a thin layer of fluid, (*) This instability is damped by surface tension, which acts to minimize the interface area and opposes Cited by: Magnetically Modulated Heat Transport in a Global Simulation of Solar Magneto-convection.
United States: N. p., Key aspects of this simulation include low numerical dissipation and a strongly sub-adiabatic fluid layer underlying the convectively unstable layers corresponding to the modeled solar convection zone. The nonlinear development of oscillatory instability under the joint action of buoyant and thermocapillary effects in a multilayer system is investigated.
The nonlinear two-dimensional convective regimes are studied by the finite-difference method. Rigid heat-insulated lateral walls are nightcapcabaret.com: Ilya B. Simanovskii, Antonio Viviani, Frank Dubois, Jean-Claude Legros.
Abstract. For deep liquid layers we provide an extension of the Stokes- Boussinesq theory to describe (space and time modulated limit cycle) nonlinear capillary-gravity waves excited and sustained by the Marangoni effect, i.e.
by the variation of surface tension with temperature or concentration of surface active material. The latter may appear as the result of chemical activity in the liquid Author: M.
Velarde, X.-L. Chu. In numerous fields of study, the component of instability within a system is generally characterized by some of the outputs or internal states growing without bounds. Not all systems that are not stable are unstable; systems can also be marginally stable or exhibit limit cycle behavior.
In structural engineering, a structure can become unstable when excessive load is applied. Fluid mechanics laboratory can assist students in making the concepts of entropy and entropy generation more tangible.
In flow of real fluids, dissipation of mechanical energy takes place due to friction in fluids. The dissipation of mechanical energy in pipeline flow is reflected in loss of pressure of fluid.
Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit nightcapcabaret.com to get more information about this book, to buy it in print, or to download it as a free PDF. All of these methods solve the problem of a steady potential flow with free surface around a ship hull.
At the actual free surface, the boundary conditions of constant (atmospheric) pressure and zero normal velocity are imposed. The free surface domain included is of finite extent, and outside its truncation boundary the fluid domain is open.
Papageorgiou DT, Papaefthymiou ES,Nonlinear stability in three-layer channel flows, Journal of Fluid Mechanics, Vol:ISSN: The nonlinear stability of viscous, immiscible multilayer flows in plane channelsdriven both by a pressure gradient and gravity is studied.
Three fluid phases arepresent with two interfaces. In order to understand the flow instabilities of coupled rotation and thermal-solutal capillary convection of binary mixture in a Czochralski configuration subjected to simultaneous radial thermal and solutal gradients, a series of three-dimensional direct numerical simulation have been conducted.
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The oil layer on the water dampens waves because surface tension within the oil layer acts to against the waves – it is like an elastic band stretched over the water – you get the same effect with a plastic sheet. “Slow Drift in Thermoregulated Emergent Systems”. SIAM Journal on Numerical AnalysisAbstract | PDF ( KB) () Computer-aided analysis and design of digital filters with arbitrary nightcapcabaret.com by: Nov 09, · Evaluating the performance of the two-phase flow solver interFoam.
accounting only for the temporal, viscous and advective terms and neglecting for the moment pressure, surface tension and gravity terms. This yields Srinivasan V and Salazar A J Modeling the disintegration of modulated liquid jets using volume-of-fluid (VoF.
These fields are most likely not only advected from the deepest layers of the solar convection zone, after being generated by the global dynamo, but are also generated locally by a surface dynamo, although it is not clear to what relative degree.
Oct 29, · Thermal evolution of the North Atlantic lithosphere: New constraints from magnetic anomaly inversion with a fractal magnetization model Surface heat flow, bathymetry, gravity, and geoid do not show so clear signatures of we interpret that the onset time of North Atlantic SSC is ∼40 Ma, when the first dripping instability starts to Cited by: Fluid Mechanics 2 Units of Measurement 3 Solids, Liquids, and Gases 3 Continuum Hypothesis 5 Molecular Transport Phenomena 5 Surface Tension 8 Fluid Statics 9.
60th Annual Meeting of the Divison of Fluid Dynamics Volume 52, Number 12 An adsorbed monolayer of surfactant molecules on the interface dynamically alters the surface tension distribution when the suspending liquid is set in motion.
Bifurcations of free thermal vibrational convection in cylindrical fluid layer in micro-gravity. Full text of "Microgravity Science and Applications. Program Tasks and Bibliography for FY " See other formats. We evaluated the sensitivity and time resolution of a technique for photochemical reaction monitoring based on the interferometric detection of the deformation of liquid films.
The reaction products change the local surface tension and induce Marangoni flow in the liquid film. As a model system, we consider the irradiation of the aliphatic hydrocarbon squalane with broadband deep-UV nightcapcabaret.com by: 2.
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Magma chambers in particular have shaped thinking on many fundamental issues of crust formation, chemical differentiation, plutonism and nightcapcabaret.com by: I will focus on a lubricated channel (i.e. a flow configuration in which an interface separates a thin layer of a less-viscous fluid from a main layer of a more-viscous fluid flowing inside a plane channel), and I will discuss the influence of viscosity and surface tension on the overall friction (drag reduction mechanism).
Nov 24, · Fluid motion with a velocity an order of magnitude larger than that of the forcing occurs within a thin boundary layer above the bottom surface. The resonant wave is unstable because of strong shear; Kelvin-Helmholtz billows precede wave breaking.
Spectral methods involve seeking the solution to a differential equation in terms of a series of known, smooth functions. They have recently emerged as a viable alternative to finite difference and finite element methods for the numerical solution of partial differential equations.
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Books published in this series are conceived as bridging mate. Both properties can be regarded as capillary phenomena and are likely to be coupled.
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Vertical Coherence of Turbulence in the Atmospheric Surface Layer: Connecting the Hypotheses of Townsend and Davenport D.J. Krug, W. Baars, N. Hutchins, and I.
Marusic Boundary-Layer Meteorology– () BibTeΧ: Large eddy simulations of the effect of vertical staggering in large wind farms [Open Access]. This list of Potential Climatic Variables was built with the help of a multitude of WUWT reader comments, beginning on this thread on January, 15thand growing on January 22nd,February 10th,February 28th,June 30th, and January 21st, Your help in continuing to build this list would be most appreciated.
Semiconductor epitaxy: why is it important? Course theme: interplay between science, technology and application Lecture topics and schedule Brief biography Break Round-table discussion of planned lectures and lecture formats Overview of Sandia National Laboratories The DoE National Laboratories Sandia National Laboratories Movie clips.We begin with the simpler case of surface gravity waves at the top of a constant density fluid.
SURFACE GRAVITY WAVES Let us consider an incompressible fluid with a free surface and a flat bottom that obeys the equations of motion D𝒗 = −∇𝜙 − 𝑔𝐤, ∇ ⋅ 𝒗 = 0, () D𝑡 using our standard notation, with 𝜙 = 𝑝.Long-range attraction between particles in dusty plasma and partial surface tension of a dusty phase boundary Experimental Evidence of Thermal Vibrational Convection in a Nonuniformly Heat Fluid in a Reduced Gravity Environment Phys.
Rev. Lett., Thermophoresis of particles in a heated boundary layer J. Fluid Mech., (), pp.