dynamics of a drop in a constricted capillary tube

Dynamics of drops in branched tubes Journal of Fluid

Dynamics of drops in branched tubes Journal of Fluid

Apr 26, 2006 · The flow of two-dimensional deformable drops through branching (bifurcating) tubes is studied numerically using a boundary integral formulation. The undeformed drop diameter is assumed to be less than the tube diameter. Capillary numbers between 10 −2 and 1 are considered. Flow in the branching tube is characterized by the fraction of fluid which enters each of the two downstream sp.info Experimental Investigation of the Dynamics of Trapped Nov 28, 2019 · Changes in the permeability of porous media can be induced by the mobilization of trapped colloids, immiscible droplets, or bubbles due to such dynamic stressing. In order to analyze the mechanism of this seismic‐induced mobilization, a theoretical fluid dynamics conceptual model had been developed to describe this phenomenon in constricted tubes. In the research presented in this paper, we made an experimental effort to obtain reliable data to study the dynamics sp.info Minimum applied pressure for a drop through an abruptly Jan 07, 2015 · Although the dynamics of the motion of the drop in constricted capillary (Lundström 1996; Shih and Lee 2002) has been extensively investigated, less work has been reported in transport phenomena for drops under gravity through an abruptly constricted capillary. While these phenomena widely exist in many sciences and engineering applications, thus, this work attempts to develop a comprehensive model for a drop flowing through an abruptly constricted capillary under gravity, sp.info The effects of surfactant on the dynamics of bubble snap driven by a pressure gradient through a capillary tube is investigated numerically. We nd that a drop in a straight capillary tube can either approach a steady-state shape or develop a re-entrant cavity at its rear. For a gas bubble moving through a constricted capillary tube, we nd that snap-o can occur and surfactants enhance the snap-o process.


			Buoyancy-driven motion and breakup of viscous drops in

Buoyancy-driven motion and breakup of viscous drops in

Sep 01, 2006 · It is found that a drop breakup occurs when the size of drop is larger than a critical value in various modes depending on the relative drop size, channel constriction and Bond number. When the Bond number is large, a drop breaks up into a large leading drop and many smaller trailing drops for the drop sizes equal or slightly larger than the critical value.sp.info A computational study of two-phase viscoelastic systems in periodically constricted capillary tubes and found that drop deformation is enhanced by visco-elasticity irrespective of which phase is elastic. Wu33 numerically investigated both buoyancy-driven and pressure-driven motions of viscoelastic drop in a capillary tube. He found that elasticity in the drop phase suppresses drop deformation.sp.info Capillary pressure across a pore throat in the presence of The constricted capillary tube was con-nected to a microcontrol 5 mL syringe through a stainless steel tube. A pressure transducer mounted next to the inlet was used to monitor the liquid pressure. The general test configuration is sketched in Figure 2.sp.info Gas Flow Dynamics in Inlet Capillaries:Evidence for non May 31, 2016 · In this work, the characteristics of gas flow in inlet capillaries are examined. Such inlet capillaries are widely used as a first flow restriction stage in commercial atmospheric pressure ionization mass spectrometers. Contrary to the common assumption, we consider the gas flow in typical glass inlet capillaries with 0.5 to 0.6 mm inner diameters and lengths about 20 cm as transitional or


			The effects of surfactant on the dynamics of bubble snap

The effects of surfactant on the dynamics of bubble snap

We find that a drop in a straight capillary tube can either approach a steady-state shape or develop a re-entrant cavity at its rear. For a gas bubble moving through a constricted capillary tube, we find that snap-off can occur and surfactants enhance the snap-off process.sp.info (PDF) Comments on “Investigation of the resonance of Comments on “Investigation of the resonance of nonwetting droplets in constricted capillary tubes” by Zeng et al. (2020) drop inside the capillary tube, liquid and for the dynamic sp.info drop in pore ces - Homepagestime-dependent change of the drop shape. Drop breakup was also observed and analyzed primarily qualitatively. The buoyancy-driven motion of viscous drops and gas bubbles in a vertical periodically constricted capillary was studied experimentally by Hemmat and Borhan (1996) to examine the role of capillary geometry on drop deformation and breakup.sp.info Low-Reynolds-number droplet motion in a square Jul 22, 2011 · Tsai T.M., Miksis M.J.:Dynamics of a drop in a constricted capillary tube. J. Fluid Mech. 274, 197–217 (1994) Article MATH MathSciNet Google Scholar 34. Wang, Y.:Flow and interfacial dynamics in vascular vessels and microfluidics. PhD. Thesis, University of Maryland (2007) 35


			Vibration-induced mobilization of trapped non-aqueous

Vibration-induced mobilization of trapped non-aqueous

Chapter 6 is a manuscript on droplet breakup and its dynamics in constricted capillary tubes driven by interfacial tension. Chapter 7 reaches the general conclusions from this research and recommendations for future work. 1.3. References Abad-Guerra, B P., (1976). Methods for restoring productivity to gas wells in the Clintonsp.info Migration of a droplet in a cylindrical tube in the inside a capillary tube. Olbricht & Kung [17] experi-mentally studied the motion of drops in a capillary tube for a large range of the capillary numbers, drop sizes and viscosity ratios. They reported the e↵ects of drop size and viscosity ratio on the critical capillary number, above which the drop breakup occurs.sp.info Studio della dinamica di trasporto di gocce in Systems of drops in annular flows are common in nature and many applications that employ such phenomena are under development. This thesis presents an experimental work regarding the velocity of medium sized water-in-oil droplets in micrometric circular capillaries (0.3 um of diameter) as a function of different parameters – length of the drop (long from 1 to 15 tube diameters), viscosity sp.info Influence of dynamic factors on nonwetting fluid snap-off Nov 05, 2015 · DOE PAGES Journal Article:Influence of dynamic factors on nonwetting fluid snap-off in pores. Influence of dynamic factors on nonwetting fluid snap-off in pores. Full Record; References (27) Cited by (4) Other Related Research; Abstract. Snap-off is an important dynamic multiphase flow phenomenon which occurs in porous media.

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