Original title: Numerical tests of far-field boundary conditions for stably stratified flows
Authors: Bodnár, Tomáš ; Fraunié, P. ; Řezníček, Hynek
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2019, Prague (CZ), 20190220
Year: 2019
Language: eng
Abstract: 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.
Keywords: boussinesq approximation; far-field boundary condition; stable stratification
Project no.: GA16-03230S (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of Topical Problems of Fluid Mechanics 2019, ISBN 978-80-87012-69-7, ISSN 2336-5781
Note: Související webová stránka: http://www.it.cas.cz/fm/im/im/proceeding/2019/3

Institution: Institute of Mathematics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0298966

Permalink: http://www.nusl.cz/ntk/nusl-403631


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Research > Institutes ASCR > Institute of Mathematics
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