Numerical Solutions of Unsteady Flows with Low Inlet Mach Numbers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F10%3A00168108" target="_blank" >RIV/68407700:21220/10:00168108 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388998:_____/10:00342983

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Numerical Solutions of Unsteady Flows with Low Inlet Mach Numbers

Popis výsledku v původním jazyce

This study deals with a numerical solution of a 2D unsteady flow of a compressible viscous fluid in a channel for low inlet airflow velocity. The unsteadiness of the flow is caused by a prescribed periodic motion of a part of the channel wall with largeamplitudes, nearly closing the channel during oscillations. The flow in channel can represent a model of airflow coming from the trachea, through the glottal region with periodically vibrating vocal folds, and to the human vocal tract. The flow is described by a system of Navier-Stokes equations for laminar flows in Arbitrary Lagrangian-Eulerian formulation. The numerical solution is implemented using the finite volume method and the predictor-corrector MacCormack scheme with Jameson artificial viscosity. The numerical results for unsteady flows in the channel are presented for inlet Mach number M=0.012, Reynolds number Re = 5000 and wall motion frequency 100 Hz.

Název v anglickém jazyce

Numerical Solutions of Unsteady Flows with Low Inlet Mach Numbers

Popis výsledku anglicky

This study deals with a numerical solution of a 2D unsteady flow of a compressible viscous fluid in a channel for low inlet airflow velocity. The unsteadiness of the flow is caused by a prescribed periodic motion of a part of the channel wall with largeamplitudes, nearly closing the channel during oscillations. The flow in channel can represent a model of airflow coming from the trachea, through the glottal region with periodically vibrating vocal folds, and to the human vocal tract. The flow is described by a system of Navier-Stokes equations for laminar flows in Arbitrary Lagrangian-Eulerian formulation. The numerical solution is implemented using the finite volume method and the predictor-corrector MacCormack scheme with Jameson artificial viscosity. The numerical results for unsteady flows in the channel are presented for inlet Mach number M=0.012, Reynolds number Re = 5000 and wall motion frequency 100 Hz.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Mathematics and Computers in Simulation

ISSN

0378-4754

e-ISSN

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Svazek periodika

80

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

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Kód UT WoS článku

000278820500022

EID výsledku v databázi Scopus

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