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Hele-Shaw flow

About: Hele-Shaw flow is a research topic. Over the lifetime, 5451 publications have been published within this topic receiving 151320 citations.


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Journal ArticleDOI
TL;DR: In this paper, flow visualization and LDV measurements are performed on laminar flow in a helical square duct with finite pitch, and the experimental observations are compared to results of numerical calculations employing the finite-volume method and assuming a fully developed flow.

49 citations

Journal ArticleDOI
TL;DR: In this article, a numerical analysis of a viscous incompressible fluid confined in a circular cylindrical chamber has been carried out, where the top disk is rotating with a constant angular velocity, and the bottom disk and side wall are held fixed.
Abstract: A numerical computation of a viscous incompressible fluid confined in a circular cylindrical chamber has been carried out, where the top disk is rotating with a constant angular velocity, and the bottom disk and side wall are held fixed. Using the full Navier‐Stokes equations, steady secondary flows were calculated for various Reynolds numbers (Re = Ωb2/ν) up to a maximum value of 400. It is found that, for the Reynolds numbers below 10, the governing equations are essentially linear and the numerical solution agrees very well with the analytic solution. For higher Reynolds numbers, the flow near the boundary is intensified. The detailed flow patterns are compared with previous work of a single disk and two infinite disks. The volume flow rate of the secondary flow due to the centrifugal action and the frictional moment of the disk were also calculated.

49 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of channel size and superficial phasic velocity on the two-phase flow pattern and pressure drop of air-water mixture in circular microchannels with inner diameters of 100, 180 and 324μm were investigated.

49 citations

Journal ArticleDOI
TL;DR: In this article, an experimental study of the swirling flow generated in the gap between two coaxial corotating disks is presented, which involves a single turbulent vortex undergoing a slow precession motion.
Abstract: We report an experimental study of the swirling flow generated in the gap between two coaxial corotating disks. We use a free geometry, i.e., unshrouded disks in air, with moderate to high Reynolds numbers. When the relative rotation rate is varied, transitions in the flow can be observed by global power measurement and are related to the geometry of the external recirculating flow. The mean flow is studied in details with hot‐wire measurements using a boxcar‐type averaging technique. It involves a single turbulent vortex undergoing a slow precession motion. We show that statistical properties of the turbulent fluctuations are affected by the dynamics of the mean flow, which also displays a correlation with the global power fluctuations.

49 citations

Journal ArticleDOI
TL;DR: In this paper, a detailed investigation of liquid-liquid stratified flow through horizontal conduits is presented, which considers the pronounced effect of surface tension and attempts to modify the Taitel-Dukler model.
Abstract: The stratified configuration is one of the basic and most important distributions during two phase flow through horizontal pipes. A number of studies have been carried out to understand gas-liquid stratified flows. However, not much is known regarding the simultaneous flow of two immiscible liquids. There is no guarantee that the information available for gas-liquid cases can be extended to liquid-liquid flows. Therefore, the present work attempts a detailed investigation of liquid-liquid stratified flow through horizontal conduits. Gas-liquid flow exhibits either smooth or wavy stratified orientations, while liquid-liquid flow exhibits other distinct stratified patterns like three layer flow, oil dispersed in water, and water flow, etc. Due to this, regime maps and transition equations available for predicting the regimes in gas-liquid flow cannot be extended for liquid-liquid cases by merely substituting phase physical properties in the equations. Further efforts have been made to estimate the in-situ liquid holdup from experiments and theory. The analysis considers the pronounced effect of surface tension, and attempts to modify the Taitel-Dukler model to account for the curved interface observed in these cases. The curved interface model of Brauner has been validated with experimental data from the present work and those reported in literature. It gives a better prediction of liquid holdup in oil-water flows and reduces to the Taitel-Dukler model for air-water systems.

49 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202339
202282
202120
202013
20199
201829