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International Journal of Fluid Mechanics Research

Published 6 issues per year

ISSN Print: 2152-5102

ISSN Online: 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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Peculiarities of Oscillations of Human Trachea Walls

Volume 29, Issue 5, 2002, 17 pages
DOI: 10.1615/InterJFluidMechRes.v29.i5.40
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ABSTRACT

The analysis of peculiarities of trachea wall structure is conducted. Possible mechanisms of its excitation are discussed. The acoustical and mathematical models of trachea with elastic walls are developed. These models foresee the possibilities of kinematic excitation of the upper end of trachea and propagation of an elastic wave along the trachea wall. In the wide frequency range a quantitative analysis of modulus and phase of the oscillatory velocity of the trachea elastic wall is performed. These data are compared with those obtained for the acoustical model of trachea with locally responding walls. It is shown that the elastic wall behaves as a delay line, and an elastic wave can propagate along this line in the range of low frequencies (f < 500 Hz), having the speed about 10 ё 20 m/sec. At higher frequencies the elastic wall behaves like a locally responding surface. It is shown that even relatively low levels of kinematic excitation of the upper end of trachea cause significant changes in the character of frequency dependence of the trachea wall oscillatory Velocity. The analysis of the frequency dependencies of oscillatory velocities of the first seven annular cartilages of the trachea wall is performed. It is found that their levels diminish with the increase of the distance of cartilage from the upper end of trachea. The relatively simple technique allowing to estimate real values of the transmission function of the oscillatory velocity from vocal chords to the upper end of trachea is proposed.

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