TY - CONF
T1 - Oscillatory instability of natural convection of air in a laterally heated cubic box
AU - Gelfgat, Alexander
N1 - Funding Information:
This work was supported by the LinkSCEEM-2 project, funded by the European Commission under the 7th Framework Program through Capacities Research Infrastructure, INFRA-2010-1.2.3 Virtual Research Communities, Combination of Collaborative Project and Coordination and Support Actions (CP-CSA) under grant agreement no RI-261600. The author acknowledges PRACE for awarding him access to resource CURIE based in France at Tr?s Grand Centre de Calcul.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - Direct numerical simulation of the first instability threshold of buoyancy convection in a laterally heated cubic cavity is carried out on a series of finite volume grids whose size varies from 1003 to 2563. The horizontal and spanwise boundaries are assumed to be either perfectly thermally conducting or perfectly thermally insulating, which leads to consideration of four different configurations. It is shown that in the case of perfectly conducting horizontal boundaries the instability is similar to a corresponding two-dimensional case, while in the case of perfectly insulated boundaries it is qualitatively different and results in flow oscillations of high frequency and low amplitude. Multiple supercritical oscillatory states are observed in one of the cases considered.
AB - Direct numerical simulation of the first instability threshold of buoyancy convection in a laterally heated cubic cavity is carried out on a series of finite volume grids whose size varies from 1003 to 2563. The horizontal and spanwise boundaries are assumed to be either perfectly thermally conducting or perfectly thermally insulating, which leads to consideration of four different configurations. It is shown that in the case of perfectly conducting horizontal boundaries the instability is similar to a corresponding two-dimensional case, while in the case of perfectly insulated boundaries it is qualitatively different and results in flow oscillations of high frequency and low amplitude. Multiple supercritical oscillatory states are observed in one of the cases considered.
KW - Computational methods
KW - Convection
KW - Numerical simulation and super-computing
UR - http://www.scopus.com/inward/record.url?scp=85088752829&partnerID=8YFLogxK
U2 - 10.1615/ihtc15.cpm.009724
DO - 10.1615/ihtc15.cpm.009724
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AN - SCOPUS:85088752829
T2 - 15th International Heat Transfer Conference, IHTC 2014
Y2 - 10 August 2014 through 15 August 2014
ER -