Document Detail


Low-dimensional models of the glottal flow incorporating viscous-inviscid interaction.
MedLine Citation:
PMID:  19173426     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The behavior of glottal flow can, to a large extent, be characterized by development and separation of the boundary layer. The point of flow separation is known to vary during the phonatory cycle due to change in channel configuration. To take the movable nature of the separation point into account, the boundary-layer equation is solved numerically, and the values of the characteristic quantities are determined as well as the point of separation. Development of the boundary layer in general reduces the effective size of the channel, and, therefore, increases the core flow velocity, which, in turn provides the boundary condition of the boundary-layer equation. The interaction between the viscous (boundary layer) and inviscid (core flow) parts of the glottal flow is, therefore, strongly indicated. To apply this viscous-inviscid interaction, the expression of the core flow is derived for a two-dimensional flow field, and is solved jointly with the boundary-layer equation. Numerical results are shown to examine the effect of the Reynolds number and glottal configuration, with special emphasis on the comparison of flow models developed for one- and two-dimensional flow fields. Numerical results are also quantitatively compared with data obtained from flow measurement experiments.
Authors:
Tokihiko Kaburagi; Yosuke Tanabe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  125     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-28     Completed Date:  2009-07-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  391-404     Citation Subset:  IM    
Affiliation:
Department of Acoustic Design, Faculty of Design, Kyushu University, Fukuoka, Japan.
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MeSH Terms
Descriptor/Qualifier:
Glottis / physiology*
Humans
Models, Biological
Phonation / physiology*
Vocal Cords / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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