3 edition of The generation of capillary instabilities by external disturbances in a liquid jet found in the catalog.
The generation of capillary instabilities by external disturbances in a liquid jet
by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, D.C.], [Springfield, Va
Written in English
|Statement||Stewart J. Leib.|
|Series||NASA technical memorandum -- 87041.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
Comparison between measured total resultant capillary forces and those calculated from the Young-Laplace law is very good, except for some discrepancies at very small separations (below50 μm). Up to four consecutive instabilities of capillary bridge are seen developing at some sphere separations. Nov 23, · Advanced Petrophysics: Volume 2: Dispersion, Interfacial Phenomena/Wettability, Capillarity/Capillary Pressure, Relative Permeability [Ekwere J. Peters PhD PE] on blogorazzia.com *FREE* shipping on qualifying offers. A practical, fast-paced approach to teaching the concepts and problems common in petroleum engineering that will appeal to a wide range of disciplines 5/5(4).
quantify the capillary pressure function is an empirical considered to be a function of saturation. There are some relationship between capillary pressure and saturation indications that the relative permeability–saturation re-in the form (see, e.g., Bear and Verruijt, ): lationship also shows hysteresis effects and may depend. Converting lab capillary pressure data. Follow the steps in the table below to convert P c to buoyancy pressure, pore throat size (r), or hydrocarbon column height (h′). Assume water-wet conditions in the reservoir (γ = interfacial tension, Θ = contact angle).Link: Web page.
Capillary rise occurs when a liquid wets the inside of a tube and the surface tension draws additional liquid into the wetted area. Figure illustrates the effects of contact angles and capillary action. Figure The Rise or Depression of Liquid in a Capillary Tube Depends upon the Contact Angle. Penetrant Entry Into discontinuities. We present modeling and analysis for the static behavior and collapse instabilities of doubly-clamped and cantilever microbeams subjected to capillary forces. These forces can be as a result of a volume of liquid trapped underneath the microbeam during the rinsing and drying process in fabrication. The model considers the microbeam as a continuous medium, the capillary force as a nonlinear Cited by:
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The Generation of Capillary Instabilities by External Disturbances in a Liquid Jet Stewart J. Leib Lewis Research Center Cleveland, Ohio Wehave cited two exampleswhere the liquid capillary Jet breakup process can be put to use. These examples illustrate the importance of.
Get this from a library. The generation of capillary instabilities by external disturbances in a liquid jet. [Stewart J Leib; United States. National Aeronautics and Space Administration.]. Dec 16, · Abstract. This chapter deals with capillary instability of straight free liquid jets moving in air.
It begins with linear stability theory for small perturbations of Newtonian liquid jets and discusses the unstable modes, characteristic growth rates, temporal and spatial instabilities and their underlying physical blogorazzia.com by: Measurement of Liquid Jet Instability Induced by Surface Tension Variations R.
Faidley Center for Electromechanics R. Panton Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas IILiquid jet instability was first formally analyzed by Rayleigh over years ago and has since been the subject of a number of blogorazzia.com by: 9.
PHYSICAL REVIEW E 87, () Effect of gravity on capillary instability of liquid jets Ghobad Amini,1,* Matthias Ihme,2 and Ali Dolatabadi3 1Department of Aerospace Engineering, University of Michigan, Ann Arbor, MichiganUSA 2Department of Mechanical Engineering, Stanford University, Stanford, CaliforniaUSA 3Department of Mechanical and Industrial Engineering, Concordia.
A nonlinear analysis of the effect of heat transfer on capillary jet instability. unstable disturbances for a jet with velocity Capillary instability of elliptic liquid jets Phys.
Nov 21, · The temporal linear instability of an inviscid capillary liquid jet with a source of mass is investigated.
Two different spatial mass distributions are considered. In the first case, mass is added uniformly everywhere in the jet.
In the second case, mass is added uniformly in the radial direction, but allowed to change along the axial blogorazzia.com by: 2. RADEV, S. Lateral instability of two-layer liquid capillary jets.
Theor. appl. Mech. 1, (in Russian). LINEAR CAPILLARY INSTABILITY OF COMPOUND JETS 79 RADEV, S. & GOSPODINOV, P. Numerical treatment of the steady flow of a liquid compound jet. Int. Multiphase Flow 12, Cited by: Capillary instabilities in thin nematic liquid crystal filament have an additional contribution from anisotropic effects such as surface gradients of bending stress, which can provide extra.
The disturbance on a capillary jet can be imposed by radius modulation, velocity modulation, or jet vibration.
The objective of the study is to understand the equivalence between the three types of disturbances. Theoretical analysis based on the Bernoulli equation for unsteady flows is conducted. It is found that a radius-modulated disturbance is equivalent to a velocity-modulated disturbance Cited by: We investigate the behaviour of a liquid jet stimulated by pressure disturbances using a photometric measurement of the jet shadow width.
Two apparatuses involving lights of different nature are utilized and measurements are taken from the exit of the nozzle to drop breakoff for different operating blogorazzia.com by: Capillary Instability of a Jet Induced by Surface Tension Modulations B.
Barbet 1,2, This paper presents experiments performed on a fluid jet stimulated by an external thermal device which in our case is light and consequently the disturbances applied onto the jet.
nard et al investigated the jet breakup in Rayleigh regime using a coupled level-set-ghost-fluid approach. Later, Zhang et al studied capillary jet breakup by the Arbitrary Lagrangian-Eulerian (ALE) method coupled with direct boundary tracking technique. Delteil et al analyzed the Rayleigh breakup of round liquid jets using the VOF method.
Under what conditions will the myogenic mechanism slow blood flow into a capillary bed. rising arteriolar pressure.
Fenestrations in capillaries are small pores that allow water and small substances to move freely through these pores.
Damage to the external iliac. Start studying Chapter 18 dynamic study module. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Damage to the external iliac artery will affect delivery of blood to the Determine fluid movement when hydrostatic pressure exceed colloid osmotic pressure at the arteriolar end of the capillary.
Arteries. Apr 19, · The nonlinear capillary instability of a liquid jet. Part 3. Experiments on satellite drop formation and control - Volume 96 Issue 2 - K. Chaudhary, T. MaxworthyCited by: Jet Break-up following Savart •Savarts observations •Disturbances that upset the equilibrium is imposed on the fluid as it leaves the aperture.
•Continuous portion of the jet is the distance traveled in time that is needed for the disintegration of the jet. •The continuous part can. Capillary action is the physical phenomenon arising due to surface tension on the interface of immiscible media. Commonly, capillary phenomena occur in liquid media and are brought about by the curvature of their surface that is adjacent to another liquid, gas, or its own vapor.
a liquid jet.9,14,15 Therefore, we must study the early behavior of a liquid jet released upon impact to understand the mecha-nism of splashing. In this work, we propose the Rayleigh– Taylor instability of the radially expanding sheet upon its generation, in cylindrical geometry, as a.
Capillary Instability of a Streaming Fluid ﬂuids has been started little bit earlier than the comprehensive work of Radwan (). Indeed the principle and basic physics of the new type of liquid in air jet are described by Hertz and Hermanrud (). The capillary perturbation analysis.
For more information on the source of this book, or why it is If the adhesive forces are stronger than the cohesive forces, as is the case for water, then the liquid in the capillary rises to the level where the downward force of gravity exactly balances this upward force.
capillary action, and viscosity are unique properties of liquids.Moreover, the numerical results show a good agreement with experimental data for the breakup length of the liquid jet under different wave numbers.
The velocity profile and the pressure gradient in the necking zone of the jet are analyzed to clarify the droplet detachment blogorazzia.com: Nima Moallemi.We use the Rayleigh–Plateau capillary instability as vehicle to introduce the theoretical approach referred to as linear instability analysis.
This method aims to unravel the link between the growth of disturbances in space and in time, and the growth of instabilities in open flows with finite streamwise blogorazzia.com by: