3 edition of Marangoni instability in a liquid layer with two free surfaces found in the catalog.
Marangoni instability in a liquid layer with two free surfaces
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va
Written in English
|Statement||Robert J. Diessler, Alexander Oron, and J.C. Duh.|
|Series||NASA technical memorandum -- 106166., ICOMP -- no. 93-15., ICOMP -- no. 93-15.|
|Contributions||Oron, Alexander., Duh, J. C., United States. National Aeronautics and Space Administration.|
|The Physical Object|
The onset of cellular convection induced by surface tension gradients on a thin layer of liquid as developed by Pearson (J Fluid Mech 4: –, ) is . In order to investigate the Marangoni convection instability of cSt silicone oil induced by evaporation in liquid layer, a series of experiments are carried out in an open rectangular pool. The effects of side wall temperature as well as ambient temperature on competitions between BM convection and thermocapillary convection are analyzed Cited by: 7.
An analytical and experimental study of thermally induced instability in horizontal two-fluid layers is reported. A liner stability analysis for two initially motionless, viscous immiscible fluids confined between horizontal isothermal solid surface and subject to both density (Bénard) and surface-tension-grandient (Marangoni) drving mechanisms is by: The coupled dynamics of two conjugated liquid layers of disparate thicknesses, which coat a solid substrate and are subjected to a transverse temperature gradient, is in-vestigated. The upper liquid layer evolves under the short-wavelength (SW) B´enard-Marangoni (BM) instability, whereas the lower, much thinner ﬁlm undergoes a shear-File Size: 1MB.
We consider a system that consists of a layer of an incompressible binary liquid with a deformable free surface, and a solid substrate layer heated or cooled from below. The surface tension is assumed to depend linearly on both the temperature and the solute concentration. The Soret effect is taken into account. We investigate the long-wave Marangoni instability in Cited by: 3. We investigate the oscillatory convective instability in a liquid layer with a deformable free surface. We provide linear stability analysis within a non-Boussinesq approach as Author: D. V. Lyubimov, T. P. Lyubimova, N. I. Lobov, A. E. Samoilova.
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When the liquid layer has one or two free surface(s) and the thermal gradient is perpendicular to the free surface(s), one of the instability sources is the surface tension dependency on temperature, also know as the Marangoni ef.
The onset of the Marangoni instability in a liquid layer with two free nearly insulating surfaces heated from below is studied. Linear stability analysis yields a condition for the emergence of a longwave or a finite wavelength instability from the.
We show that these leaf-like forms are generated by a surface-tension instability at the air–liquid interface along which there exists variable concentration of glycerin and water.
Spatial variations of surface tension drive intense vortices inside the water layer, which interact with the glycerin–water concentration at the by: Get this from a library.
Marangoni instability in a liquid layer with two free surfaces. [Robert J Deissler; Alexander Oron; J C Duh; United States. National Aeronautics and. Marangoni instability in a liquid layer bounded by two coaxial cylinder surfaces. Abstract. A liquid layer, confined between two coaxial cylinder surfaces, has either a gasliquid interface on the inside and is heated from the outer (solid) boundary, or it has a gas-liquid interface on the outside and is heated from the inner (solid) by: 7.
Marangoni instability of two liquids mixing at a free surface - NASA/ADS The impact of a water drop on a thin layer of glycerin leads to the formation of an intricate flower-like pattern. This work deals with Bénard-Marangoni convection in a thin horizontal fluid layer heated from below.
The lower surface of the layer is in contact with a uniformly heated rigid plate and the upper face is deformed and submitted to a temperature-dependent surface : Georgy Lebon, Georgy Lebon, Pierre Cerisier, Olivier Dupont. When the liquid layer has one or two free surface(s) and the thermal gradient is perpendicular to the free surface(s), one of the instability sources is the surface tension dependency on temperature, also known as the Marangoni by: 7.
We investigate a combined long-wave Marangoni and Rayleigh instability of a quiescent state of a binary (nano-) liquid layer with a non-deformable free surface. The layer is. An overstability due to a chemical absorption for an infinite liquid layer with a deformable free surface has been theoretically investigated by means of the small disturbance analysis.
The surface deformability leads to coexistence of oscillatory and stationary by: 5. CONCLUSIONS In the present work we have analysed various aspects of the Marangoni instability of a floating liquid layer with two free surfaces and a permeable divider located in the mid-plane that serves as a heat source or heat by: 6.
We study the Marangoni instability in a thin polymeric liquid film heated from the free surface. Polymeric solutions are usually the binary mixture of a.
The Marangoni instability is introduced by the temperature dependence of surface tension. In general, surface tension is a decreasing function of temperature.
Consider a liquid layer heated from below and bounded by a free surface above. If fluid rises at a certain point in the layer, this will create a hot spot on the free surface. A liquid layer containing a single solute is bounded on the outside by a rigid spherical surface and on the inside by a concentric gas/liquid interface.
The solute evaporates from the liquid to the gas phase and, if the surface tension depends on the solute concentration, surface-tension driven convective flows may arise (Marangoni instability). Assuming zero Cited by: 7.
Schematic diagram of the destabilizing mechanisms in two-liquid-layer Benard–Marangoni convection. (a) When the system is heated´ from below, thermocapillary forces are destabilizing in the lower layer and stabilizing in the upper layer, while.
The resulting T(x,y) may destabilize the layer to Figure a) Marangoni convection in a shear layer may lead to transverse surface waves or streamwise rolls (c).
Surface deﬂection may accompany both instabilities (b,d). Marangoni convection. Smith & Davis (ab) considered the case of ﬂat free surface. System behaviour depends on Pr = ν/κ.
Pukhnachov V.V. () Long Wave Instability of Viscous Liquid Free Surface Due to Anomalous Marangoni Effect. In: Brown R.A., Davis S.H. (eds) Free Boundaries in Viscous Flows. The IMA Volumes in Mathematics and its Applications, vol Cited by: 1.
Marangoni instability of two liquids mixing at a free surface: The impact of a water drop on a thin layer of glycerin leads to the formation of an intricate flower-like pattern. We show that these leaf-like forms are generated by a surface-tension instability at the air-liquid interface along which there exists variable concentration of.
Marangoni Convection. Marangoni convection, which is induced by a surface tension gradient on the interface, is an important physical phenomenon under microgravity conditions. In the mids, Marangoni found the phenomenon that the natural convection dominated by liquid gravity gradually disappeared in a microgravity environment, whereas at the interface of liquid, the.
The development of the Marangoni instability in a two-layer film in the presence of a transverse temperature gradient and a heat release/consumption at the liquid-liquid. Investigated in this paper is the stability of the gravity-driven flow of a liquid layer laden with soluble surfactant down a heated incline.
A mathematical model incorporating variations in surface tension with surfactant concentration and temperature has been : S. J. D. D’Alessio, J.
P. Pascal, E. Ellaban, C. Ruyer-Quil.In this paper, we study the onset of cellular convection in a horizontal fluid layer heated from below, with a free-slip boundary condition at the bottom when the driving mechanism is surface tension at the upper free surface, in the light of the modified analysis of Banerjee et al.
(Jour. Math. & Phys. Sci.,17, ).Author: A.K. Gupta.We investigate Marangoni instability in a thin liquid film resting on a substrate of low thermal conductivity and separated from the surrounding gas phase by a deformable free surface.