Finite element approximation of flow induced vibrations of human vocal folds model: Effects of inflow boundary conditions and the length of subglottal and supraglottal channel on phonation onset

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00471642" target="_blank" >RIV/61388998:_____/18:00471642 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/18:00316282

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0096300317301303/pdfft?md5=864ee5857797a92fa89c5c1c34ad4eed&pid=1-s2.0-S0096300317301303-main.pdf&download=true&isDTMRedir=true" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0096300317301303/pdfft?md5=864ee5857797a92fa89c5c1c34ad4eed&pid=1-s2.0-S0096300317301303-main.pdf&download=true&isDTMRedir=true</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.amc.2017.02.026" target="_blank" >10.1016/j.amc.2017.02.026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Finite element approximation of flow induced vibrations of human vocal folds model: Effects of inflow boundary conditions and the length of subglottal and supraglottal channel on phonation onset

Popis výsledku v původním jazyce

The paper presents the numerical analysis of interaction of the vibrating simplified human vocal folds model with the incompressible viscous airflow in a channel modeling simplified subglottal and supraglottal spaces. The flow in the considered 2D computational fluid domain is governed by the Navier-Stokes equations written in the Arbitrary Lagrangian-Eulerian form. The stabilized finite element method is applied for numerical approximation and the choice of boundary conditions and their implementation is discussed. For the considered model problem the prescribed inlet velocity and prescribed pressure difference formulations were numerically analyzed. The prescribed inlet velocity formulation was successful in predicting of the flutter velocity value, whereas the prescribed pressure difference gave nonphysical results. Finally a modified inlet boundary condition motivated by the penalization approach is suggested. It is shown that this approach gives possibilities to optimize the inlet boundary condition related to a physical reality by changing smoothly the penalty parameter in the interval between the two extremes and to treat the complete closures of the channel.

Název v anglickém jazyce

Finite element approximation of flow induced vibrations of human vocal folds model: Effects of inflow boundary conditions and the length of subglottal and supraglottal channel on phonation onset

Popis výsledku anglicky

The paper presents the numerical analysis of interaction of the vibrating simplified human vocal folds model with the incompressible viscous airflow in a channel modeling simplified subglottal and supraglottal spaces. The flow in the considered 2D computational fluid domain is governed by the Navier-Stokes equations written in the Arbitrary Lagrangian-Eulerian form. The stabilized finite element method is applied for numerical approximation and the choice of boundary conditions and their implementation is discussed. For the considered model problem the prescribed inlet velocity and prescribed pressure difference formulations were numerically analyzed. The prescribed inlet velocity formulation was successful in predicting of the flutter velocity value, whereas the prescribed pressure difference gave nonphysical results. Finally a modified inlet boundary condition motivated by the penalization approach is suggested. It is shown that this approach gives possibilities to optimize the inlet boundary condition related to a physical reality by changing smoothly the penalty parameter in the interval between the two extremes and to treat the complete closures of the channel.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

<a href="/cs/project/GA16-01246S" target="_blank" >GA16-01246S: Počítačové a experimentální modelování samobuzených kmitů hlasivek a vliv jejich poškození na lidský hlas</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Mathematics and Computation

ISSN

0096-3003

e-ISSN

—

Svazek periodika

319

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

178-194

Kód UT WoS článku

000415906200016

EID výsledku v databázi Scopus

2-s2.0-85014418963