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The Effects of Numerical Viscosities
Journal of Computational Physics, 1996We begin a systematical study on the effect of numerical viscosities. In this paper we investigate the behavior of shock-capturing methods for slowly moving shocks. It is known that for slowly moving shocks even a first-order scheme, such as the Godunov or Roe type methods, will generate downstream oscillatory wave patterns that cannot be effectively ...
Shi Jin, Jian-Guo Liu
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Viscosity Effect in Cyclone Separators
Latin American and Caribbean Petroleum Engineering Conference, 2009Abstract The gas liquid cyclone separator is a device that works as a result of the centrifugal force acting on the denser phase of a two-phase flow. This causes the liquid phase which is denser than the gas, to move outward to the cyclone wall.
A. Brito, J. Trujillo
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Sedimentation and Effective Viscosity
Nature, 1960I WISH to comment on the communication by Prof. G. J. Kynch on this subject1. With the author's reservations (see following letter), the derivation of equation (8) seems satisfactory, though it is difficult 6 to see the need for the constant added in equation (6). The final equation may be written in the form:
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2019
There are many situations where we are interested in the sound field in the vicinity of small objects. This often requires us to account for the viscosity of the medium. This greatly complicates the relationship between fluid velocity near solid obstacles and the fluctuating pressure.
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There are many situations where we are interested in the sound field in the vicinity of small objects. This often requires us to account for the viscosity of the medium. This greatly complicates the relationship between fluid velocity near solid obstacles and the fluctuating pressure.
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Pressure Effect on Extensional Viscosity
Journal of Reinforced Plastics and Composites, 1999The primary object of these experiments was to investigate the influence of hydrostatic pressure on entrance flow. The effect of pressure on shear and extensional viscosity was evaluated using an axis symmetric capillary and a slit die where the hydrostatic pressure was raised with valves.
Jens H. Christensen, Erik M. Kjaer
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Effective Viscosity Coefficient of Nanosuspensions
AIP Conference Proceedings, 2008Systematic calculations of the effective viscosity coefficient of nanosuspensions have been performed using the molecular dynamics method. It is established that the viscosity of a nanosuspension depends not only on the volume concentration of the nanoparticles but also on their mass and diameter. Differences from Einstein’s relation are found even for
V. Ya. Rudyak +3 more
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Textile Research Journal, 1945
The differential staining of the "skin" and "core" of viscose rayon by certain dyes has been previously explained on the basis of a more highly oriented skin. Improved meth ods of staining, developed in the present investigation, show that the formation of a skin is more closely related to the crystallization rate of the cellulose in the spinning bath
Frederick F. Morehead, Wayne A. Sisson
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The differential staining of the "skin" and "core" of viscose rayon by certain dyes has been previously explained on the basis of a more highly oriented skin. Improved meth ods of staining, developed in the present investigation, show that the formation of a skin is more closely related to the crystallization rate of the cellulose in the spinning bath
Frederick F. Morehead, Wayne A. Sisson
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Effective diffusion in vanishing viscosity
2002We study the asymptotic behavior of effective diffusion for singular perturbed elliptic operators with potential first order terms. Assuming that the potential is a random perturbation of a fixed periodic function and that this perturbation does not affect essentially the structure of the potential, we prove the exponential decay of the effective ...
Campillo, Fabien, Piatnitski, Andrey L.
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The Pressure-Viscosity Effect: Background
Journal of Fluids Engineering, 1958Abstract Indications are that the pressure-viscosity effect is an important factor in certain cases of lubrication, notably heavily-loaded elements. How important it is in the lubrication of lightly-loaded elements we do not know, nor do we know what refinements in design may be possible by taking this factor into account.
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Viscosity effects in rigid PVC
Journal of Vinyl and Additive Technology, 2000Abstract The viscosity of PVC is better understood if the material is treated as a fluid which contains filler. Anomalous effects such as die swell increasing with increasing melt temperature and melting history causing changes to the viscosity can be explained if the PVC primary particles are viewed as filler which disappears during ...
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