Direct simulation calculations of the rarefied flow past a forward-facing step

AIAA Journal ◽  
1977 ◽  
Vol 15 (1) ◽  
pp. 124-126 ◽  
Author(s):  
D. I. Pullin ◽  
J. K. Harvey
Keyword(s):  
Direct Simulation ◽  
Rarefied Flow ◽  
Flow Past ◽  
Forward Facing Step

High-Speed Rarefied Flow Past a Rotating Cylinder: The Inverse Magnus Effect

AIAA Journal ◽  
2016 ◽  
Vol 54 (5) ◽  
pp. 1670-1681 ◽  
Author(s):  
Benzi John ◽  
Xiao-Jun Gu ◽  
Robert W. Barber ◽  
David R. Emerson
Keyword(s):  
High Speed ◽  
Rotating Cylinder ◽  
Rarefied Flow ◽  
Flow Past ◽  
Magnus Effect

Modelling of chemical reactions in hypersonic rarefied flow with the direct simulation Monte Carlo method

1996 ◽  
Vol 312 ◽  
pp. 149-172 ◽  
Author(s):  
Michael A. Gallis ◽  
John K. Harvey
Keyword(s):  
Monte Carlo ◽  
Chemical Reactions ◽  
Energy Exchange ◽  
Chemical Reactivity ◽  
Direct Simulation Monte Carlo ◽  
Direct Simulation ◽  
Rarefied Flow ◽  
Rarefied Flows ◽  
Exchange Processes ◽  
Simulation Monte Carlo

In this paper the phenomenon of chemical reactivity in hypersonic rarefied flows is examined. A new model is developed to describe the reactions and post-collision energy exchange processes that take place under conditions of molecular non-equilibrium. The new scheme, which is applied within the framework of the direct simulation Monte Carlo (DSMC) method, draws its inspiration from the principles of maximum entropy which were developed by Levine & Bernstein. Sample hypersonic flow fields, typical of spacecraft re-entry conditions in which reactions play an important role, are presented and compared with results from experiments and other DSMC calculations. The latter use traditional methods for the modelling of chemical reactions and energy exchange. The differences are discussed and evaluated.

scholarly journals An accurate moving wall boundary algorithm for direct simulation of Monte Carlo in unsteady rarefied flow

2021 ◽  
Vol 33 (9) ◽  
pp. 097105
Author(s):  
He Zhang ◽  
Fanli Shan ◽  
Hong Fang ◽  
Xing Zhang ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Direct Simulation ◽  
Rarefied Flow ◽  
Moving Wall ◽  
Wall Boundary

Effect of Surface Temperature on Rarefied Flow Past a Circular Micro-Cylinder

2019 ◽  
Author(s):  
X. J. Gu ◽  
D. R. Emerson
Keyword(s):  
Drag Coefficient ◽  
Wall Temperature ◽  
Flow Separation ◽  
Gas Flow ◽  
Free Stream ◽  
Stream Temperature ◽  
Order Moment ◽  
Rarefied Flow ◽  
Flow Past ◽  
Lower Reynolds Number

Abstract A high-order moment method is employed to study the effect of the wall temperature on gas flow past a stationary circular cylinder in terms of the size of the vortices behind the cylinder and the drag coefficient. When the wall temperature is lower than the free stream temperature, flow separation occurs at a lower Reynolds number and the vortex length is elongated with a corresponding reduction in the drag coefficient. Conversely, increasing the wall temperature above the free stream temperature delays the onset of flow separation and increases the drag coefficient.

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