Three-dimensional rarefied gas flows in constricted microchannels with different aspect ratios: asymmetry bifurcations and secondary flows

2014 ◽  
Vol 18 (2) ◽  
pp. 279-292 ◽  
Author(s):  
Tong-Miin Liou ◽  
Chin-Tien Lin
Keyword(s):  
Rarefied Gas ◽  
Three Dimensional ◽  
Secondary Flows ◽  
Gas Flows ◽  
Rarefied Gas Flows ◽  
Aspect Ratios

Efficient Deterministic Modelling of Three-Dimensional Rarefied Gas Flows

2012 ◽  
Vol 12 (1) ◽  
pp. 162-192 ◽  
Author(s):  
V. A. Titarev
Keyword(s):  
Gas Flow ◽  
Parallel Machines ◽  
High Efficiency ◽  
Rarefied Gas ◽  
Three Dimensional ◽  
Collision Integral ◽  
Gas Flows ◽  
Rarefied Gas Flows ◽  
Deterministic Modelling ◽  
Model Collision

AbstractThe paper is devoted to the development of an efficient deterministic framework for modelling of three-dimensional rarefied gas flows on the basis of the numerical solution of the Boltzmann kinetic equation with the model collision integrals. The framework consists of a high-order accurate implicit advection scheme on arbitrary unstructured meshes, the conservative procedure for the calculation of the model collision integral and efficient implementation on parallel machines. The main application area of the suggested methods is micro-scale flows. Performance of the proposed approach is demonstrated on a rarefied gas flow through the finite-length circular pipe. The results show good accuracy of the proposed algorithm across all flow regimes and its high efficiency and excellent parallel scalability for up to 512 cores.

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
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