On the boundary conditions in the numerical simulation of stably stratified fluids flows

0471221 - MÚ 2018 RIV CZ eng C - Conference Paper (international conference)
Bodnár, Tomáš - Fraunié, P.
On the boundary conditions in the numerical simulation of stably stratified fluids flows.
Topical Problems of Fluid Mechanics 2017. Prague: Institute of Thermomechanics AS CR, v. v. i., 2017 - (Šimurda, D.; Bodnár, T.), s. 45-52. ISBN 978-80-87012-61-1.
[Topical Problems of Fluid Mechanics 2017. Prague (CZ), 15.02.2017-17.02.2017]
R&D Projects: GA ČR GA16-03230S
Institutional support: RVO:67985840
Keywords : Boussinesq approximation * stable stratification * compact finite-difference
OECD category: Pure mathematics
http://www.it.cas.cz/fm/im/im/proceeding/2017/7

This paper presents the results of a numerical study of the stably stratified flow over a low smooth hill. The emphasize is on certain problems related to artificial boundary conditions used in the numerical simulations. The numerical results of three-dimensional simulations are shown for a range of Froude and Reynolds numbers in order to demonstrate the varying importance of these boundary issues in different flow regimes. The simulations were performed using the Boussinesq approximation model solved by a high-resolution numerical code. The in-house developed code is based on compact finite-difference discretization in space and Strong Stability Preserving Runge-Kutta time integration.
Permanent Link: http://hdl.handle.net/11104/0268629