Numerical Investigation Of Turbulent Natural
Convection In Enclosures
Author(s)
L. Škerget, J. Ravnik & J. Lupše
Abstract
The set of partial differential equations governing the motion of viscous fluid is
known as nonlinear Navier–Stokes equations. This equation system is generally
considered to be the fundamental description for all laminar as well as turbulent
flows. The occurrence of small scale structures in turbulent flows prevents a direct
numerical simulation (DNS) of the governingNavier–Stokes equations. Therefore,
much attention is paid to large eddy simulation (LES), in which the large scale
turbulent structures are captured explicitly by the discretization model, while
the effect of the small structures, namely subgrid scales, are modelled with an
appropriate subgrid scale turbulent model. In the LES methodology the classical
Smagorinsky subgrid scale eddy-viscosity model with Van Driest damping closed
to the wall is most widely applied.
The paper deals with a LES numerical solver based on the velocity-vorticity
formulation of the filtered Navier–Stokes equations. The governing equations are
solved with a numerical solution algorithm, which is based on the boundary
element method (BEM). The single domain as well as domain decomposition
approaches are applied.
Keywords: Navier–Stokes equations, boundary element method, turbulence
simulation and modelling, 2D DNS and LES numerical investigation, turbulent
natural convection in enclosures.
Keywords
Navier–Stokes equations, boundary element method, turbulence
simulation and modelling, 2D DNS and LES numerical investigation, turbulent
natural convection in enclosures
Related Book
Other papers in this volume
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