Natural Convection With Turbulent Flow In A Rectangular Cavity With Cooled Surfaces.
Abstract
It is studied in the present work the natural convection of the air (Pr = 0.7), in a
rectangular cavity in order to evaluate the heat gain of the domain. It is considered a
rectangular cavity whose upper surface is kept at a cold isothermal temperature and the
remaining walls at constant convection. To discretize the computational domain, the Galerkin
finite element method is applied. The flow is considered to be two-dimensional, turbulent,
incompressible, and unsteady. In the turbulence model, it is implemented the large eddy
simulation (LES) with two sub-grid scale models: vorticity transfer theory (VTT) and secondorder
structure-function (F2). The streamfunction ψ, the temperature θ, and the velocity
vectors are obtained. The average Nusselt numbers Num are also calculated on the vertical
surfaces as a function of some geometrical and physical parameters.
rectangular cavity in order to evaluate the heat gain of the domain. It is considered a
rectangular cavity whose upper surface is kept at a cold isothermal temperature and the
remaining walls at constant convection. To discretize the computational domain, the Galerkin
finite element method is applied. The flow is considered to be two-dimensional, turbulent,
incompressible, and unsteady. In the turbulence model, it is implemented the large eddy
simulation (LES) with two sub-grid scale models: vorticity transfer theory (VTT) and secondorder
structure-function (F2). The streamfunction ψ, the temperature θ, and the velocity
vectors are obtained. The average Nusselt numbers Num are also calculated on the vertical
surfaces as a function of some geometrical and physical parameters.
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