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International Journal for Multiscale Computational Engineering

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 1543-1649

ISSN Online: 1940-4352

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: 1.4 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 Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 2.2 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: 0.00034 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: 0.46 SJR: 0.333 SNIP: 0.606 CiteScore™:: 3.1 H-Index: 31

Indexed in

Modeling High-Frequency Acoustic Velocities in Patchy and Partially Saturated Porous Rock using Differential Effective Medium Theory

Volumen 2, Ausgabe 1, 2004, 17 pages
DOI: 10.1615/IntJMultCompEng.v2.i1.80
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ABSTRAKT

Differential effective medium (DEM) theory is applied here to the problem of modeling physical properties of poroelastic media that are partially saturated with liquid. Typical fluid saturants are air and water, or gas and oil. If the liquid and gas saturants are homogeneously mixed, then we say the medium is partially saturated. If the liquid and gas saturants are very poorly mixed, so each constituent occupies separate, but contiguous, regions of the porous medium, we say the medium has patchy saturation. Some examples are presented to show that a reasonable approach to modeling the effects of patchy saturation at high frequencies (200 kHz and above) is produced by treating the medium as if it were an homogenized mixture of gas-saturated and liquid-saturated parts that are homogeneously mixed together. Estimates of the properties for partial saturation are obtained using differential effective medium theory. The results for patchy saturation differ dramatically from those predicted by Gassmann's equations for homogeneous mixing of the fluids in individual pores. In particular, the shear modulus depends on the elastic properties of the fluid constituents, unlike the quasi-static behavior predicted by Gassmann.

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