scholarly journals Burnett Spectral Method for High-Speed Rarefied Gas Flows

2020 ◽  
Vol 42 (5) ◽  
pp. B1193-B1226
Author(s):  
Zhicheng Hu ◽  
Zhenning Cai
Keyword(s):  
Spectral Method ◽  
High Speed ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Rarefied Gas Flows

Shock-Wave-Detection Technique for High-Speed Rarefied-Gas Flows

AIAA Journal ◽  
2017 ◽  
Vol 55 (11) ◽  
pp. 3747-3756
Author(s):  
Hassan Akhlaghi ◽  
Abbas Daliri ◽  
Mohammad Reza Soltani
Keyword(s):  
Shock Wave ◽  
High Speed ◽  
Rarefied Gas ◽  
Detection Technique ◽  
Gas Flows ◽  
Wave Detection ◽  
Rarefied Gas Flows

Gaskinetic Solutions for High Knudsen Number Planar Jet Impingement Flows

2013 ◽  
Vol 14 (4) ◽  
pp. 960-978 ◽  
Author(s):  
Chunpei Cai ◽  
Chun Zou
Keyword(s):  
High Speed ◽  
Rarefied Gas ◽  
Direct Simulation Monte Carlo ◽  
Jet Impingement ◽  
Gas Flows ◽  
Free Jet ◽  
Planar Jet ◽  
Rarefied Gas Flows ◽  
Analytical Results ◽  
Good Agreement

AbstractThis paper presents a gaskinetic study and analytical results on high speed rarefied gas flows from a planar exit. The beginning of this paper reviews the results for planar free jet expanding into a vacuum, followed by an investigation of jet impingement on normally set plates with either a diffuse or a specular surface. Presented results include exact solutions for flowfield and surface properties. Numerical simulations with the direct simulation Monte Carlo method were performed to validate these analytical results, and good agreement with this is obtained for flows at high Knudsen numbers. These highly rarefied jet and jet impingement results can provide references for real jet and jet impingement flows.

Shock polar investigation in supersonic rarefied gas flows over a circular cylinder

2021 ◽  
Vol 33 (5) ◽  
pp. 052006
Author(s):  
Hassan Akhlaghi ◽  
Ehsan Roohi ◽  
Abbas Daliri ◽  
Mohammad-Reza Soltani
Keyword(s):  
Circular Cylinder ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Rarefied Gas Flows

scholarly journals Rarefied gas flows through meshes and implications for atmospheric measurements

2001 ◽  
Vol 19 (5) ◽  
pp. 563-569 ◽  
Author(s):  
J. Gumbel
Keyword(s):  
Middle Atmosphere ◽  
Rarefied Gas ◽  
Direct Simulation Monte Carlo ◽  
Atmospheric Composition ◽  
Gas Flows ◽  
Atmospheric Measurements ◽  
Rarefied Gas Flows ◽  
Flow Disturbances ◽  
Composition And Structure ◽  
Compression Effects

Abstract. Meshes are commonly used as part of instruments for in situ atmospheric measurements. This study analyses the aerodynamic effect of meshes by means of wind tunnel experiments and numerical simulations. Based on the Direct Simulation Monte Carlo method, a simple mesh parameterisation is described and applied to a number of representative flow conditions. For open meshes freely exposed to the flow, substantial compression effects are found both upstream and downstream of the mesh. Meshes attached to close instrument structures, on the other hand, cause only minor flow disturbances. In an accompanying paper, the approach developed here is applied to the quantitative analysis of rocket-borne density measurements in the middle atmosphere.Key words. Atmospheric composition and structure (instruments and techniques; middle atmosphere – composition and chemistry)

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