On the magnitude of the subgrid-scale eddy coefficient in large-eddy simulations of turbulent channel flow

1986 ◽  
Vol 162 (-1) ◽  
pp. 439 ◽  
Author(s):  
P. J. Mason ◽  
N. S. Callen
Keyword(s):  
Channel Flow ◽  
Turbulent Channel Flow ◽  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Large Eddy

Subgrid-Scale Diffusivity: Wall Behavior and Dynamic Methods

2004 ◽  
Vol 73 (3) ◽  
pp. 360-367 ◽  
Author(s):  
Guillaume Brillant ◽  
Sabine Husson ◽  
Françoise Bataille
Keyword(s):  
Prandtl Number ◽  
Boundary Conditions ◽  
Turbulent Channel Flow ◽  
Constant Heat Flux ◽  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Adiabatic Wall ◽  
Thermal Boundary Conditions ◽  
Dynamic Methods ◽  
Large Eddy

This study concerns the near-wall behavior of the subgrid-scale diffusivity. This is shown to depend on the thermal boundary conditions. Therefore, the constant subgrid-scale Prandtl number hypothesis is questionable and a direct modeling of the subgrid-scale diffusivity is considered instead. Large-eddy simulations are carried out using the Trio U code in a turbulent channel flow configuration with the three classical thermal boundary conditions (constant temperature, constant heat flux, and adiabatic wall). Different dynamic methods are used to model the subgrid-scale diffusivity and results are compared with constant subgrid-scale Prandtl number large-eddy simulations and with direct numerical simulations.

Large Eddy Simulations of Thermal Boundary Layer Spatial Development in a Turbulent Channel Flow

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Marc Sanchez ◽  
Frédéric Aulery ◽  
Adrien Toutant ◽  
Françoise Bataille
Keyword(s):  
Boundary Layer ◽  
Channel Flow ◽  
Thermal Boundary Layer ◽  
Turbulent Channel Flow ◽  
Spatial Development ◽  
Large Eddy Simulations ◽  
Boundary Layer Development ◽  
Large Eddy ◽  
The Mean ◽  
Heat Transfers

This article presents Large Eddy Simulations of thermal boundary layer spatial development in a low-Mach number turbulent channel flow. A coupling between isothermal biperiodic channel and anisothermal open channel is done to obtain a fully developed turbulent inlet. The interaction between a high temperature gradient and a turbulent flow is studied during the thermal boundary layer development. Turbulence and temperature quantities are analyzed for both streamwise and wall-normal directions. The results show how the asymmetrical heating modifies the velocity of the flow. The correlation between turbulence and heat transfers is studied. The mean and the fluctuation profiles are found to be asymmetrical. They evolve along the channel and are perturbed by the thermal gradient. Fluctuation destruction and creation areas in the length of the channel are highlighted.

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