scholarly journals Proposal of an efficient method for handling turbulent fluctuation on numerical simulations of radiative heat transfer in the large-scale industrial furnaces including hydrocarbon flame

2020 ◽  
Vol 86 (883) ◽  
pp. 19-00386-19-00386
Author(s):  
Seiichi TAKEUCHI ◽  
Tatsuyuki OKAMOTO
Keyword(s):  
Heat Transfer ◽  
Numerical Simulations ◽  
Efficient Method ◽  
Radiative Heat Transfer ◽  
Large Scale ◽  
Radiative Heat ◽  
Turbulent Fluctuation ◽  
Hydrocarbon Flame

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.

scholarly journals Prediction of the radiative heat transfer in small and large scale oxy-coal furnaces

2018 ◽  
Vol 211 ◽  
pp. 523-537 ◽  
Author(s):  
Xin Yang ◽  
Alastair Clements ◽  
János Szuhánszki ◽  
Xiaohong Huang ◽  
Oscar Farias Moguel ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Large Scale ◽  
Radiative Heat
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