Enhancement of radiative heat transfer in the laminar channel flow of non-gray gases

1988 ◽  
Vol 31 (2) ◽  
pp. 367-374 ◽  
Author(s):  
M. Hirano ◽  
T. Miyauchi ◽  
Y. Takahira
Keyword(s):  
Heat Transfer ◽  
Channel Flow ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Laminar Channel Flow

An Efficient Method for Radiative Heat Transfer Applied to a Turbulent Channel Flow

2009 ◽  
Vol 132 (2) ◽  
Author(s):  
Atsushi Sakurai ◽  
Shigenao Maruyama ◽  
Koji Matsubara ◽  
Takahiro Miura ◽  
Masud Behnia
Keyword(s):  
Heat Transfer ◽  
Radiative Transfer ◽  
Channel Flow ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Simple Algorithm ◽  
Turbulent Channel Flow ◽  
Simulation Method ◽  
Heat Fluxes ◽  
Independent Column

The purpose of this paper is to consider a possibility of the independent column approximation for solving the radiative heat fluxes in a 3D turbulent channel flow. This simulation method is the simplest extension of the plane-parallel radiative heat transfer. The test case of the temperature profile was obtained from the direct numerical simulation. We demonstrate the comparison between the 3D radiative transfer simulation and the independent column approximation with an inhomogeneous temperature field and optical properties. The above mentioned results show the trivial discrepancies between the 3D simulation and the independent column approximation. The required processing time for the independent column approximation is much faster than the 3D radiative transfer simulation due to the simple algorithm. Although the independent column simulation is restricted to simple configurations such as channel flow in this paper, wide application areas are expected due to the computational efficiency.

scholarly journals Turbulence radiation interaction in channel flow with various optical depths

2017 ◽  
Vol 834 ◽  
pp. 359-384 ◽  
Author(s):  
S. Silvestri ◽  
A. Patel ◽  
D. J. E. M. Roekaerts ◽  
R. Pecnik
Keyword(s):  
Heat Transfer ◽  
Channel Flow ◽  
Optical Thickness ◽  
Radiative Heat Transfer ◽  
Large Scale ◽  
Radiative Heat ◽  
Turbulent Channel Flow ◽  
Significant Rise ◽  
Temperature Variance ◽  
Cold Walls

The present work consists of an investigation of the turbulence radiation interaction (TRI) in a radiative turbulent channel flow of grey gas bounded by isothermal hot and cold walls. The optical thickness $\unicode[STIX]{x1D70F}$ of the channel is varied from 0.1 to 10 to observe different regimes of TRI. A high-resolution finite volume method for radiative heat transfer is employed and coupled with the direct numerical simulation (DNS) of the flow. The resulting effects of TRI on temperature statistics are strongly dependent on the considered optical depth. In particular, the contrasting role of emission and absorption is highlighted. For a low optical thickness the effect of radiative fluctuations on temperature statistics is low and causes the reduction of temperature variance through the dissipating action of emission. On the other hand, while increasing optical thickness to relatively high levels, the dissipation of temperature variance is balanced, at low wavenumbers in the turbulence spectrum, through the preferential action of absorption, which increases the large-scale temperature fluctuations. A significant rise in the effect of radiation on the temperature variance can be observed as a consequence of the reduction of radiative heat transfer length scales.

1209 Radiative Heat Transfer in a Turbulent Channel Flow

2010 ◽  
Vol 2010.47 (0) ◽  
pp. 451-452
Author(s):  
Atsushi SAKURAI ◽  
Koji MATSUBARA ◽  
Kenji TAKAKUWA ◽  
Shigenao MARUYAMA
Keyword(s):  
Heat Transfer ◽  
Channel Flow ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Turbulent Channel Flow
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