Results 161 to 170 of about 9,245,497 (198)

Dynamic wetting in the low capillary number regime

Chemical Engineering Science, 1992
An understanding of dynamic wetting is necessary when considering processes in which one fluid is forced to displace another fluid from a solid substrate. This work examines the forced wetting behavior exhibited by a series of solid-liquid systems in the low capillary number regime. In particular, the effects of specific chemical (i.e.
Jill E. Seebergh, John C. Berg
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Capillary torque on a rolling particle in the presence of a liquid film at small capillary numbers

Chemical Engineering Science, 2014
Abstract A theoretical analysis was developed for the capillary torque acting on a spherical particle rolling on a flat surface in the presence of a thin liquid film. The capillary number (the ratio of viscous force to surface tension force) is assumed to be sufficiently small that the liquid bridge has a circular cross-section. The theory identifies
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Influence of neutral cyclodextrin concentration on plate numbers in capillary electrophoresis

ELECTROPHORESIS, 2001
A quantitative theory of plate number N in capillary electrophoresis was developed for buffers containing neutral cyclodextrins (CDs) capable of forming inclusion complexes. In the theory, N was modeled by longitudinal diffusion, injection extent, width of the detection window, and the detector time constant.
T H, Seals, C, Sheng, J M, Davis
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The number of glomerular capillaries estimated by an unbiased and efficient stereological method

Journal of Microscopy, 1993
SummaryA method for unbiased capillary number estimation based on the estimation of the Euler–Poincaré characteristic or Euler number with the disector is evaluated. The generation of a new capillary creates a new loop in the capillary network corresponding to a change of exactly one unit in the Euler number of the network. In this way the Euler number
Nyengaard, J R, Marcussen, N
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Capillary number correlations for two-phase flow in porous media

Physical Review E, 2020
Relative permeabilities and capillary number correlations are widely used for quantitative estimates of enhanced water flood performance in porous media. They enter as essential parameters into reservoir simulations. Experimental capillary number correlations for seven different reservoir rocks and 21 pairs of wetting and nonwetting fluids are analyzed.
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Capillary moisture content of a number of powders of varied nature

Russian Journal of Applied Chemistry, 2006
The moisture content of a number of powders of varied nature, kept in a medium with 100% humidity, was studied. The volume of capillary fluid “bridges” between particles of powdered materials was evaluated.
Yu. G. Tselishchev, V. A. Val’tsifer, O. G. Vasil’eva   +2 more
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Correlation between capillary number and residual water saturation

Journal of Colloid and Interface Science, 1990
Abstract Displacement of a wetting phase by a nonwetting phase is controlled by the viscous as well as the capillary forces. The ratio of viscous forces to that of the capillary is called the capillary number. It is found that the residual water saturation was affected by increasing the viscosity of the displacing phase and by reducing the ...
Khalid Al-Fossail, Lyman L Handy
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The Behavior of a Capillary Surface for Small Bond Number

1987
The boundary value problem $$\begin{array}{lc}\text{div}(Tu) = \kappa u & \text{in} \Omega \\ Tu \cdot v = \cos\gamma & \text{on} \Sigma = \partial \Omega\end{array}$$ (1) determines the height u(x) of a capillary surface. Here κ is a positive constant, Ω is a bounded domain in R n , v is the exterior normal on Σ, and Tu is the vector ...
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Number of theoretical plates achievable by a toroidal capillary electrophoresis system

Journal of Separation Science, 2017
AbstractThe ability of a method and instrument to separate very similar compounds is related to the “plate number,” a number indicating performance. The resolution between two neighboring peaks is proportional to the square root of the plate number. Currently available commercial capillary electrophoresis instruments easily reach plate numbers of a few
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Moving contact lines at non-zero capillary number

Journal of Fluid Mechanics, 1986
Consider the unsteady motion of a fluid–fluid interface over and attached to a solid surface with one-dimensional periodic roughness in the limit of small capillary number [Copf ]. We show that the macroscopic behaviour of the interface can be described, to leading order in [Copf ], in terms of well-defined continuum quantities, even though the ...
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