Low-dimensional models of the glottal flow incorporating viscous-inviscid interaction

Tokihiko Kaburagi, Yosuke Tanabe

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)391-404
Number of pages14
JournalJournal of the Acoustical Society of America
Volume125
Issue number1
DOIs
Publication statusPublished - Jan 29 2009

Fingerprint

core flow
boundary layer equations
viscous flow
boundary layers
two dimensional flow
flow distribution
flow separation
flow measurement
interactions
configurations
Reynolds number
flow velocity
boundary conditions
cycles
Interaction
Layer

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Low-dimensional models of the glottal flow incorporating viscous-inviscid interaction. / Kaburagi, Tokihiko; Tanabe, Yosuke.

In: Journal of the Acoustical Society of America, Vol. 125, No. 1, 29.01.2009, p. 391-404.

Research output: Contribution to journalArticle

@article{00c374c3808742949d09a16109ec339a,
title = "Low-dimensional models of the glottal flow incorporating viscous-inviscid interaction",
abstract = "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.",
author = "Tokihiko Kaburagi and Yosuke Tanabe",
year = "2009",
month = "1",
day = "29",
doi = "10.1121/1.3021436",
language = "English",
volume = "125",
pages = "391--404",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "1",

}

TY - JOUR

T1 - Low-dimensional models of the glottal flow incorporating viscous-inviscid interaction

AU - Kaburagi, Tokihiko

AU - Tanabe, Yosuke

PY - 2009/1/29

Y1 - 2009/1/29

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=58649111945&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=58649111945&partnerID=8YFLogxK

U2 - 10.1121/1.3021436

DO - 10.1121/1.3021436

M3 - Article

VL - 125

SP - 391

EP - 404

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 1

ER -