scholarly journals Large eddy simulation for vertical sorting process in sheet-flow regime

2011 ◽  
Vol 67 (2) ◽  
pp. I_471-I_475
Author(s):  
Eiji HARADA ◽  
Naoki TSURUTA ◽  
Hitoshi GOTOH
Keyword(s):  
Large Eddy Simulation ◽  
Flow Regime ◽  
Sheet Flow ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Sorting Process

LARGE-EDDY SIMULATION OF OPPOSING-JET-PERTURBED SUPERSONIC FLOWS PAST A HEMISPHERICAL NOSE

2010 ◽  
Vol 24 (13) ◽  
pp. 1287-1290 ◽  
Author(s):  
LI-WEI CHEN ◽  
CHANG-YUE XU ◽  
XI-YUN LU
Keyword(s):  
Large Eddy Simulation ◽  
Flow Regime ◽  
Cell Structure ◽  
Pressure Ratio ◽  
Flow Regimes ◽  
Bow Shock ◽  
Complex Flow ◽  
Unstable Flow ◽  
Eddy Simulation ◽  
Large Eddy

A supersonic flow past a hemispherical nose with an opposing jet placed on its axis has been investigated using large eddy simulation. We find that the flow behaviors depend mainly on the jet total pressure ratio and can be classified into three typical flow regimes of unstable, stable and transition. The unstable flow regime is characterized by an oscillatory bow shock with a multi-jet-cell structure and the stable flow regime by a steady bow shock with a single jet cell. The transition regime lies between the unstable and stable ones with a complex flow evolution. Turbulence statistics are further analyzed to reveal the relevant turbulent behaviors in the three flow regimes. The results obtained in this study provide a physical insight into the understanding of the mechanisms underlying this complex flow.

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