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International Journal of Fluid Mechanics Research

Publicado 6 números por año

ISSN Imprimir: 2152-5102

ISSN En Línea: 2152-5110

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.1 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.0002 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

Particulate Pressure in Disperse Flow

Volumen 26, Edición 1, 1999, pp. 72-97
DOI: 10.1615/InterJFluidMechRes.v26.i1.50
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SINOPSIS

We develop a model to describe the velocity variance and particulate pressure in fluidized beds, and also in one-dimensional disperse flows. These quantities involve contributions caused by 1) short-scale pseudoturbulent fluctuations of particles in the dense phase of a fluidized bed, and 2) long-scale fluctuations due to macroscopic flow patterns, such as rising bubbles that are practically devoid of particles. Energy comes to the pseudoturbulent fluctuations from the relative motion of the ambient fluid as it interacts with random fluctuations of the dispersion concentration, and also from gravity working at density fluctuations. Inter-particle exchange by momentum and energy is assumed to be carried out by particle collisions, in which case the particles may be approximately treated as statistically independent, and their fluctuations can be regarded as nearly isotropic. The long-scale contributions to velocity variance and particulate pressure are evaluated on the basis of a simple dimensionality consideration. In some dispersion flows, the gas slip velocity may greatly exceed the particle terminal velocity, and consequently, the pseudoturbulent particulate pressure turns out to be much larger than that in a fluidized bed of the same particles at the same concentration. The theoretical conclusions are proven to be in good keeping with all experimental data for fluidized beds available to date.

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