Experimental Investigation of Taylor Instability Using Non-Newtonian Fluids PDF Download
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Author: C. S. Song
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
The critical Taylor numbers for five different non-Newtonian solutions were determined experimentally by visual observation using the hydrogen bubble technique. Contrary to a finding by others, the present experiment indicates that the critical Taylor number is decreased as the concentration is increased. The shear on the outer cylinder due to rotation of the inner cylinder was also measured for an intermediate range of Reynolds number. Substantial reductions of frictional drag coefficient were achieved at higher additive concentrations when the comparison was based on equal Reynolds number. (Author).
Author: C. S. Song
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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Book Description
The critical Taylor numbers for five different non-Newtonian solutions were determined experimentally by visual observation using the hydrogen bubble technique. Contrary to a finding by others, the present experiment indicates that the critical Taylor number is decreased as the concentration is increased. The shear on the outer cylinder due to rotation of the inner cylinder was also measured for an intermediate range of Reynolds number. Substantial reductions of frictional drag coefficient were achieved at higher additive concentrations when the comparison was based on equal Reynolds number. (Author).
Author: Kenneth Keh-ya Chen
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 70
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572
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Author: Grétar Tryggvason
Publisher: Cambridge University Press
ISBN: 1139496700
Category : Computers
Languages : en
Pages : 337
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Book Description
Accurately predicting the behaviour of multiphase flows is a problem of immense industrial and scientific interest. Modern computers can now study the dynamics in great detail and these simulations yield unprecedented insight. This book provides a comprehensive introduction to direct numerical simulations of multiphase flows for researchers and graduate students. After a brief overview of the context and history the authors review the governing equations. A particular emphasis is placed on the 'one-fluid' formulation where a single set of equations is used to describe the entire flow field and interface terms are included as singularity distributions. Several applications are discussed, showing how direct numerical simulations have helped researchers advance both our understanding and our ability to make predictions. The final chapter gives an overview of recent studies of flows with relatively complex physics, such as mass transfer and chemical reactions, solidification and boiling, and includes extensive references to current work.
Author: Pamela Susan Roach
Publisher:
ISBN:
Category : Computational fluid dynamics
Languages : en
Pages : 212
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"When an elastic-plastic solid is accelerated by a fluid of lower density, Rayleigh-Taylor instability (RTI) is observed, and the instability is mitigated by the material's mechanical strength, initial conditions, and the acceleration that drives the instability. Such instances of RTI are observed in supernovas, explosive welding, and inertial confinement fusion. In contrast to Newtonian fluids, experimental study of RTI in accelerated solids is traditionally hindered by difficulty to measure material properties and exceedingly small time scales. An understanding of the role initial conditions and material properties have on the growth of RTI will lead to better control of the instability. We present the results for a series of experiments to study the effect of amplitude and wavelength on RT instability with an elastic-plastic solid. A novel rotating wheel RT experiment that uses centrifugal forces to accelerate the two-material interface is used for this purpose. The experiment consists of a container filled with air and mayonnaise, a non-Newtonian emulsion, with an initial perturbation between the two materials. Single mode perturbations of various amplitudes and wavelength were analyzed and results found the instability required for acceleration was inversely proportional to both initial amplitude and wavelength. Three-dimensional (3D) interfaces were found to be more stable than two-dimensional (2D) interfaces. Elastic and plastic peak amplitude responses were observed for stable interfaces using a variable acceleration profile where the test section was first accelerated to slightly below the critical acceleration and then decelerated at the same rate. This exercise allowed for verification of the elastic-plastic (EP) transition process before instability was reached"--Abstract, leaf iii.
Author:
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ISBN:
Category : Weights and measures
Languages : en
Pages : 802
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Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 336
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Author: James M. White
Publisher:
ISBN:
Category :
Languages : en
Pages : 650
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 828
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Author:
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 360
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