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2 edition of Compressibility and channel formation in sedimenting systems found in the catalog.

Compressibility and channel formation in sedimenting systems

Gareth Butt

Compressibility and channel formation in sedimenting systems

by Gareth Butt

  • 65 Want to read
  • 11 Currently reading

Published .
Written in English


Edition Notes

Thesis (Ph.D.) - Loughborough University, 1997.

Statementby Gareth Butt.
ID Numbers
Open LibraryOL17300341M

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Jun 03,  · The reason for this enhanced permeability is the enhanced area fluctuations that lead to a maximum in the lateral compressibility. Nagle and Scott proposed that the changes in lateral compressibility lead to a facilitation of pore formation since the increased compressibility lowers the work necessary to create a membrane defect. In the. Apatite is a group of phosphate minerals, usually referring to hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ions, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca10(PO4)62, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, .


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Compressibility and channel formation in sedimenting systems by Gareth Butt Download PDF EPUB FB2

The\ud accuracy of such a system is shown to be a function of a number of variables, in particular particle morphology. Not all materials were found to be suitable to this\ud form of imaging. Three primary materials, aragonite, calcite and talc were used, each\ud exhibited random channelling, i.e.

channel formation was not due to the presence. Compressibility and channel formation in sedimenting systems Author: Butt, Gareth. Compression and channelling in sedimenting systems i 19 EXPERIMENTAL The calcite, talc and aragonite used in this study were supplied by Merck Ltd, Viaton and Sturge Ltd respectively.

The true solid densities were found to beand kg m-3, from a series of tests using density bottles and distilled water. The flow of a compressible viscous fluid in a channel with a blow was numerically simulated.

The results of a computational experiment were compared with approximate solutions and calculation data presented in the literature. The results obtained allow one to estimate the role of the compressibility of a fluid in the formation of the structure of its flow in a channel with permeable walls.

MOP Book set: Sedimentation Engineering ISBN (print): ISBN Compressibility and channel formation in sedimenting systems book For some oilfield purposes, Cm and Cb are small, and the composite formation compressibility Ct is assumed to be equal to Cp.

Typical values for Ct are 3 to 25 * 10^-6 psi Ct varies inversely with porosity and pressure, and numerous authors have published correlations applicable to specific rock. The formation of the different density layers in sedimenting high-concentrated dispersed systems phenomenon has, probably, a widespread character.

It may be connected with the specificity of the formation of the spatial structures arising spontaneously upon the movement and contacting of the finely dispersed particles under gravity. where m(p)=∫pbp2pμzdp is the gas pseudo-pressure, p is the pore pressure inside the sample, φ is the porosity, C g is the gas isothermal compressibility, C f is the formation compressibility, μ is the gas viscosity, and k is the permeability.

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keeps it at a low level. So it is possible to get a quasi-stationary filtrate flow for a long time. Various models have been developed to describe the physical process of filtration. Calculations were made of the liquid volumes apparently associated with the sedimenting particles, according to the method of McKay.

Floc formation and particle-liquid association are discussed as causes of hindrance to sedimentation. Artificial Compressibility-Based CBS Scheme for the Solution of the Generalized Porous Medium Model Article in Numerical Heat Transfer Fundamentals 55(3) · February with 53 Reads.

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height of moving interface between clear solution and sedimenting particles when sludge has been allowed to settle for 30 min (m) m. ratio of wet to dry cake mass. compressibility coefficient defined by Eq. applied filtration pressure (Pa) Q. air flow rate (L min −1) R c. resistance arising from cake formation (m −1) R m.

This paper presents the results of an experimental study of channel formation during settling and self-weight consolidation in fine-grained materials. Four types of fine-grained materials and different slurry concentrations were tested using large and small settling columns, and channel formation was observed using a high-resolution digital camera.

commercial detection systems (both the absorbance scanner [20, 21] and the laser interferometry system []) and when using current data analysis techniques, the precision of the sedimentation coefficients is well in the range where the effects of solvent compressibility are significant, even for aqueous solvents.

Interaction of sedimenting drops in a miscible solution - Formation of heterogeneous toroidal-spiral particles Article (PDF Available) in Soft Matter 8(29) · July with 14 Reads. Introduction to Compressible Flow ≠0 Dt Dρ The density of a gas changes significantly along a streamline Compressible Flow Definition of Compressibility: the fractional change in volume of the fluid element per unit change in pressure p p p p v p +dp p +dp p +dp p +dp v −dv Compressible Flow 1.

Mach Number: 2. Compressibility becomes. May 17,  · Compressibility and heat release effects in high-speed reactive mixing layers I.: Growth rates and turbulence characteristics Combustion and Flame, Vol. Investigation of strut-ramp injector in a Scramjet combustor: Effect of strut geometry, fuel and jet diameter on mixing characteristics.

The Permian basin of west Texas and Southeastern New Mexico is one of the major petroleum producing regions of the United States. This basin produced 3% of the world's petroleum in and in that year, 1% of the world's proven reserves were in the Permian basin (Robichaud, ).

Most of the Upper Permian hydrocarbon reservoirs are in San Andres and Grayburg formations (Galloway et al., ).In the first two test cases, the model is employed to simulate a sedimenting and a fluidized particle bed.

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