Results 221 to 230 of about 124,745 (257)
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On the apparent permeability of regular arrays of nonuniform fibers
Physics of Fluids, 2002Numerical calculations for fluid flow across arrays of fibers of equal as well as of varying size have been carried out for conditions of creeping flow as well as for conditions of flow with substantial inertia. Based on numerical results for pressure drop and flow rate we compute the apparent hydraulic permeability of many such arrays.
Markicevic, B., Papathanasiou, T. D.
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Improvement Methods of Apparent Permeability of Ferromagnetic Core
Advanced Materials Research, 2013The performance of induction coil magnetic sensors , which usually have large dimensions and heavy weights, is mainly decided by apparent permeability of the core. But flux concentrator is a effective equipment to improve apparent permeability of the core, which will hardly increase dimensions and weights of magnetic sensors.
Sui Hua Zhou, Zhi Yi Chen, Shi Min Feng
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Estimation of the Apparent Permeability in the Dynamic Centrifuge Tests
Geotechnical Testing Journal, 2009Abstract Centrifuge model tests have been widely used to validate analytical procedures, with the assumption that variations of parameters from the prototype to the model are governed by the scaling law. However, the coefficient of permeability in dynamic centrifuge tests seems to be much larger than the value calculated from the scaling
Su, Dong, Li, Xiang Song, Xing, Feng
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Effects of Certain Dietary Fibers on Apparent Permeability of the Rat Intestine
The Journal of Nutrition, 1986Apparent intestinal permeability was determined indirectly by orally administering a poorly absorbed dye, phenol red, to rats and measuring its recovery in feces and in urine. Increased apparent permeability was recognized by increased dye recovery in urine and by an increased ratio of urinary to fecal dye recovery. Guar gum, pectin, carrageenan type I
S Y, Shiau, G W, Chang
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The impact of assay recovery on the apparent permeability, a function of lysosomal trapping
Xenobiotica, 2019In vitro permeability assessment tools, like PAMPA, Caco-2, and MDCK, are frequently used to assess permeability and provide input in to various classification systems. Frequently, the measured recovery values in permeability assays are poor. Poor recovery may be a result of lysosomal trapping of compound.
Dallas Bednarczyk, Menaka V Sanghvi
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Apparent permeability model for shale oil with multiple mechanisms
Journal of Petroleum Science and Engineering, 2019Abstract Accurate apparent permeability (AP) model for oil transport in shale must consider natural fractures and micro/nano-pores within organic matter and inorganic matrix. Furthermore, the effect of pore geometry, tortuosity, pore size distribution (PSD), the spatial distribution of different pores, total organic content (TOC), and liquid slip ...
Qihong Feng +5 more
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Research on shale gas transportation and apparent permeability in nanopores
Journal of Natural Gas Science and Engineering, 2017Abstract Shale gas transport mechanisms in matrix nanopores include the Knudsen diffusion, transition diffusion, slip flow of free gas and surface diffusion of adsorbed gas. Previous research focused on shale gas Knudsen diffusion, slip flow and surface diffusion.
Yanfeng He +3 more
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On the apparent permeability of a porous layer backed by a perforated plate
Chemical Engineering Science, 2002Two-dimensional slow viscous flow from a fluid reservoir, through a porous layer and then through a perforated plate is studied assuming Stokes flow in the fluid reservoir and Darcy flow within the porous medium. It is first shown that the coupled Stokes/Darcy problem can be reduced to a Darcy problem when the various length scales are constrained such
J. Dufrêche +3 more
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Apparent permeability of electrical steel under PWM magnetisation
Journal of Magnetism and Magnetic Materials, 2006In recent years much attention has been paid to material performance under pulse width modulation (PWM) excitation conditions, which is of increasing importance to motor applications particularly in energy efficient variable speed drive systems. It is well known that in general, losses increase significantly with reducing modulation index, the increase
A.J. Moses, J. Leicht, P. Anderson
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Prediction of Shale Apparent Liquid Permeability Based on Fractal Theory
Energy & Fuels, 2020In this paper, we investigate the apparent liquid permeability (ALP) of shale composed of inorganic matter (IOM) and organic matter (OM).
Fanhui Zeng +5 more
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