TY - GEN TI - Numerical tests of far-field boundary conditions for stably stratified flows T3 - Topical Problems of Fluid Mechanics 2019 AU - Bodnár, Tomáš AB - 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. SN - 2336-5781 SN - 978-80-87012-69-7 UR - http://hdl.handle.net/11104/0298966 UR - http://www.nusl.cz/ntk/nusl-403631 A2 - Fraunié, P. A2 - Řezníček, Hynek LA - eng KW - stable stratification KW - far-field boundary condition KW - boussinesq approximation PY - 2019 PB - Matematický ústav, Žitná 25, 115 67 Praha 1, http://www.math.cas.cz ER -