Open AccessDisturbing action of a cubical obstacle on the turbulent vertical-plate free convection boundary layer: RANS-based simulation
Author(s) -
Alexander M. Levchenya,
Е. М. Смирнов,
A. A. Smirnovsky,
Marina Zasimova
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1697/1/012215
Subject(s) - mechanics , boundary layer , reynolds averaged navier–stokes equations , turbulence , natural convection , obstacle , cylinder , adiabatic process , convection , materials science , physics , geometry , classical mechanics , thermodynamics , mathematics , political science , law
Steady-state RANS simulations were performed to establish disturbing action of a cubical obstacle on the turbulent free convection boundary layer in air along a vertical isothermally heated plate. In the case considered, the size of the cube mounted on the plate is about one-third the full thickness of the incoming boundary layer. Using the k-ω SST turbulence model, refined-grid numerical solutions have been obtained assuming the obstacle surfaces either adiabatic or isothermal. Characteristic three-dimensional features of the free convection flow past the cubical obstacle, such as the horseshoe-like vortex structures and the near-wake recirculation, are analyzed in comparison with the previously studied case dealing with the disturbing action of a circular cylinder of unit aspect ratio. Data on heat transfer augmentation near the obstacle are presented and discussed.