Large Eddy Simulation of Rotating Channel Flows With and Without Heat Transfer

2000 ◽  
Author(s):  
Ning Meng ◽  
Richard H. Pletcher
Keyword(s):  
Heat Transfer ◽  
Large Eddy Simulation ◽  
Channel Flow ◽  
Scale Effects ◽  
Scale Model ◽  
Finite Volume Scheme ◽  
Subgrid Scale ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Rotating Channel

Abstract Large eddy simulation of rotating channel flow with and without heat transfer is reported. The rotation axis is parallel to the spanwise direction of the parallel plate channel. An implicit finite-volume scheme was used to solve the preconditioned time-dependent filtered Navier-Stokes equations using a dynamic subgrid-scale model to account for the subgrid-scale effects. Comparisons are made with available results in the literature for isothermal rotating flows. The combined effects of rotation and heat transfer on the structure of turbulence channel flow is discussed.

Large Eddy Simulation of Constant Heat Flux Turbulent Channel Flow With Property Variations: Quasi-Developed Model and Mean Flow Results

2003 ◽  
Vol 125 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Lyle D. Dailey ◽  
Ning Meng ◽  
Richard H. Pletcher
Keyword(s):  
Large Eddy Simulation ◽  
Channel Flow ◽  
Scale Model ◽  
Bulk Temperature ◽  
Finite Volume Scheme ◽  
Subgrid Scale ◽  
Mean Flow ◽  
Eddy Simulation ◽  
Heating And Cooling ◽  
Large Eddy

Turbulent planar channel flow has been computed for uniform wall heating and cooling fluxes strong enough to cause significant property variations using large eddy simulation. Channels with both walls either heated or cooled were considered, with wall-to-bulk temperature ratios as high as 1.5 for the heated case, and as low as 0.56 for the cooled case. An implicit, second order accurate finite volume scheme was used to solve the time dependent filtered set of equations to determine the large eddy motion, while a dynamic subgrid-scale model was used to account for the subgrid scale effects. Step-periodicity was used based on a quasi-developed assumption. The effects of strong heating and cooling on the flow were investigated and compared with the results obtained under low heating conditions.

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