Název:
Numerical tests of far-field boundary conditions for stably stratified flows
Autoři:
Bodnár, Tomáš ; Fraunié, P. ; Řezníček, Hynek Typ dokumentu: Příspěvky z konference Konference/Akce: Topical Problems of Fluid Mechanics 2019, Prague (CZ), 20190220
Rok:
2019
Jazyk:
eng
Abstrakt: This numerical study presents the results of simulations of stably stratified wall-bounded flows. The effect of artificial far-field boundary conditions is studied in detail. The standard homogeneous Neumann condition for pressure is replaced by a non-homogeneous condition depending on local velocity and its gradient. The two-dimensional tests are performed for the case of flow over a low isolated hill. The simulations on computational domains with three different heights are discussed to evaluate the performance of the new far-field artifcial boundary condition. The model is based on Boussinesq approximation of non-homogeneous Navier-Stokes equations, solved using artificial compressibility method, looking for a steady solution.
Klíčová slova:
boussinesq approximation; far-field boundary condition; stable stratification Číslo projektu: GA16-03230S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Proceedings of Topical Problems of Fluid Mechanics 2019, ISBN 978-80-87012-69-7, ISSN 2336-5781 Poznámka: Související webová stránka: http://www.it.cas.cz/fm/im/im/proceeding/2019/3
Instituce: Matematický ústav AV ČR
(web)
Informace o dostupnosti dokumentu:
Dokument je dostupný v repozitáři Akademie věd. Původní záznam: http://hdl.handle.net/11104/0298966