|
Numerical tests of flow in human vocal tract
Pořízková, P. ; Kozel, K. ; Horáček, Jaromír
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 large amplitudes, nearly closing the channel during oscillations. The channel is a simplified model of the glottal space in the human vocal tract. The authors present several numerical tests of computational domain, of modified numerical scheme and types of mesh for the wall motion frequency 100 Hz.
|
| |
| |
|
Simulation of Compressible Flow in Time Dependent Domains
Prokopová, Jaroslava
This work is concerned with the numerical solution of compressible flow using finite element method in ALE (Arbitrary Lagrangian-Eulerian) formulation of the Navier-Stokes equations, their discretization in space by the discontinuous Galerkin method and introducing a semi-implicit linearized time stepping for the numerical solution of the complete problem. Some computational results are presented for flow in a channel with a moving wall.
|
|
Interakce tekutiny se strukturou
Feistauer, M. ; Horáček, Jaromír ; Kučera, V. ; Prokopova, J. ; Sváček, Petr
Článek se zabývá jednak vibracemi profilu způsobené proudem tekutiny, jednak prouděním v kanálu s pohyblivými stěnami. Tento problém se vyskytuje např. v simulacích proudění lidskými hlasivkami. Vyvinutá nespojitá Galerkinova metoda konečných prvků (DGFEM) je slibná robustní metoda pro řešení stlačitelného proudění tekutin a v kombinaci s ALE metodou dovoluje řešit problémy proudění na časově závislých oblastech.
|