scholarly journals Fundamental Study on Direct Numerical Simulation Using Upwind Diffbrence Scheme

1999 ◽  
Vol 2 ◽  
pp. 599-608 ◽  
Author(s):  
Syunichiro HAYASHI ◽  
Terunori OHMOTO ◽  
Kouichi YAKITA ◽  
Ryuichi HIRAKAWA
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Fundamental Study

Fundamental Study of Turbulence-Radiation Interaction in Turbulent Channel Flow Using Direct Numerical Simulation

2011 ◽  
Author(s):  
Atsushi Sakurai ◽  
Koji Matsubara ◽  
Shigenao Maruyama
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Channel Flow ◽  
Temperature Fluctuation ◽  
Turbulent Channel Flow ◽  
Gas Absorption ◽  
Fundamental Aspect ◽  
Turbulent Fluctuation ◽  
Fundamental Study ◽  
Turbulent Flow Structure

Importance of turbulence and radiation interaction (TRI) has been investigated in a turbulent channel flow by using direct numerical simulation (DNS) to clarify detailed turbulent flow structure and heat transfer mechanisms. To investigate the effect of correlation functions between gas absorption and temperature fluctuation, the two cases of correlation are tested. Consequently, the TRI effect can be clearly observed when the correlation is positive. This fact provides the evidence that radiative intensity is enhanced by the turbulent fluctuation. The DNS results suggest the significance in the fundamental aspect of TRI. Furthermore, effects of frictional Reynolds number, Reτ, are investigated. Comparing with the case of Reτ = 150, the location of the enhancement peaks of Reτ = 300 shifts toward the walls. It is found that the relative importance of the TRI correspond to the structure of temperature fluctuation intensity originated from the differences of the Reτ.

Direct numerical simulation of pool and forced convective flow boiling phenomena

2002 ◽  
Author(s):  
Tomoaki Kunugi ◽  
Nao Saito ◽  
Yoshitsugu Fujita ◽  
Akimi Serizawa
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Convective Flow ◽  
Flow Boiling ◽  
Forced Convective Flow
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