Structure of turbulent separated flow in the neighborhood of a plate-mounted prism of square section
S.A. Valger1, N.N. Fedorova1,2, and A.V. Fedorov1,2
1Novosibirsk State University of Architecture and Civil Engineering, Novosibirsk, Russia
2Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: svetlanavalger@gmail.com
Keywords: wind actions, turbulence, boundary layer, separation, numerical methods, turbulence models
Pages: 29–41
Abstract
A 3D turbulent separated flow in the neighborhood of a plate-mounted bluff body, a parallelepiped with side length ratio 1:1:2, has been numerically simulated. The 3D structure of the flow in the vicinity of the body was revealed, and the distributions of flow quantities were obtained. Numerical data for the 3D separated flow obtained with the help of several turbulence models were compared to experimental data on the profiles of mean flow velocity and turbulence kinetic energy. It is shown that restriction of the production term for turbulence kinetic energy allows a reduction in turbulence viscosity level and improves the prediction accuracy for separation zones.
DOI: http://dx.doi.org/10.1134/S0869864315010035
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