Open AccessSimulation of fluid around parallel-column by LES
Author(s) -
Lei Cheng,
Zhenwei Zhang,
Xinyu Zhao,
Xiaoming Zhang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/740/1/012186
Subject(s) - vortex , kármán vortex street , turbulence , column (typography) , field (mathematics) , mechanics , flow (mathematics) , bluff , physics , geometry , materials science , mathematics , connection (principal bundle) , reynolds number , pure mathematics
To figure out the distributions of the parallel-column’s field, this article used LES to study parallel-column. This article demonstrate the rule of how the parallel-column field changes with P/D (P: center spacing D: diameter), focused on the how the Bluff-body’s P/D affect to the speed field & pressure field. The simulation showed the field changed as the P/D ratio rise, when P/D ratio reach 0.2-0.6 the field show as Von Karman vortices, 0.8-1.0 show as parallel field, when it got large than 1.2 will be show as vortex side flow. The optimum working point is between 0.8-1.0, the air flow in this area’s subgrid Turbulent Viscosity is smaller the vortex strength of tail also weak.