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国际流体力学研究期刊

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ISSN 打印: 2152-5102

ISSN 在线: 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

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A Hydrodynamic Instability of a Vortex in Open Systems with a Volumetric Sink and Unlimited Inflow of Matter as a Possible Mechanism of Tornado Emergence

卷 32, 册 5, 2005, pp. 565-578
DOI: 10.1615/InterJFluidMechRes.v32.i5.50
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摘要

Several exact unsteady solutions of the Navier-Stokes and continuity equations are obtained for a vortex in an incompressible viscous two-component (or two-phase) medium with a volumetric sink of matter caused by phase transition (for instance, vapor condensation in humid air at temperatures below the dew point) and with unlimited inflow of the matter from the environment. These solutions describe an exponential or “explosive” hydrodynamic instability of a “solid-body” rotation of matter in the vortex core caused by the action of convective and Coriolis forces arising as a result of nonlinear interaction between the rotating matter and radial flows, which provide constant density and composition throughout the medium (in particular, constant air humidity). This kind of hydrodynamic instability can be considered as a possible mechanism of creation and development of powerful atmospheric vortices - tornados and typhoons - during the formation of dense cloud systems when intense condensation of air moisture plays the role of a volumetric sink (convergence) of the matter.

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