New Development in Direct Simulation Monte Carlo Algorithm for Asymmetric Complex Geometry

Document Type : Research Article

Authors

1 faculty of shahrrod university of tech. mech. dep.

2 faculty of ARI

3 MACHANICAL DEP, AUT

Abstract

In this paper, the development of the direct simulation Monte Carlo algorithm has been carried out for flow analysis around axial symmetric complex geometries in rarefied conditions with consideration of reduction in computational cost compared to a full three-dimensional state, appropriate accuracy of the results compared to related available references, as well as the proper selection of particles. In this paper, the algorithm is presented that involves studying different modes of motion and collision of particles with each other or the wall for axial symmetric complex geometries in such a way that the least computations are applied for achieving a high-efficiency solution. In the results section, various geometries such as simple geometry for first case and complex geometry for second case study is investigated and the results are compared with the validated results. The results show the proper accuracy of the proposed algorithm compared to the three-dimensional solvers. Also, the selection of the smallest number of suitable particles is one of the issues that has been studied for selecting the appropriate number of particles. It has been shown that in the first and second test cases, the 30000 and 500000 particles are at least number of particles with consideration of accuracy of results.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 7
October 2020
Pages 1757-1772

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