Flows in convergent channel: comparison of numerical results of different mathematical models

0386916 - ÚT 2014 RIV AT eng J - Článek v odborném periodiku
Pořízková, P. - Kozel, Karel - Horáček, Jaromír
Flows in convergent channel: comparison of numerical results of different mathematical models.
Computing. Roč. 95, Suppl 1 (2013), s. 573-585. ISSN 0010-485X. E-ISSN 1436-5057
Grant CEP: GA ČR(CZ) GAP101/11/0207
Výzkumný záměr: CEZ:AV0Z20760514
Institucionální podpora: RVO:61388998
Klíčová slova: CFD * finite volume method * unsteady flow * viscous compressible fluid * acoustic pressure
Kód oboru RIV: BI - Akustika a kmity
Impakt faktor: 1.055, rok: 2013
http://link.springer.com/article/10.1007%2Fs00607-012-0269-x

This study deals with numerical solution of 2D unsteady flow of compressible and incompressible viscous fluid in convergent channel for low inlet airflow velocity. Three mathematical models based on system of Navier-Stokes equations for laminar flow are presented and numerical results of the models in the channel are compared. 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 numerical solution is implemented using the finite volume method and the predictor-corrector MacCormack scheme with Jameson artificial viscosity using a grid of quadrilateral cells. The unsteady grid of quadrilateral cells is considered in the form of conservation laws using Arbitrary Lagrangian-Eulerian method. The numerical results, acquired from a developed program, are presented for inlet velocity uĄ = 4.12 m/s and Reynolds number ReĄ = 4 x 103 and the wall motion frequency 100 Hz.
Trvalý link: http://hdl.handle.net/11104/0221905