Title of article :
On the numerical modelling of the transitional flow in rarefied gases
Author/Authors :
Scherer، نويسنده , , G.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1999
Pages :
9
From page :
165
To page :
173
Abstract :
The aim of this work is to simulate rarefied gas flow in complex geometries, under flow conditions that range from the hydrodynamic, through the transitional, to the molecular regimes. Existing computational models apply to molecular or viscous flow, but the treatment of the transitional flow is still underdeveloped. l with the difficult transitional flow, two models with overlapping ranges of applicability are introduced. A direct simulation Monte Carlo (DSMC) type model, which can be used in the molecular and up to the lower transitional flow, has been designed. For the viscous to the upper transitional flow, a numerical model using a particle method is proposed. The objective is to obtain a smooth transition between the probabilistic simulation of particle histories and the deterministic approach of the solution of partial differential equations. MC model has been successfully applied to molecular and lower transitional flow in a complex geometry with stationary and moving boundaries. The test results agree well with published data. The particle method was tested using simplified Navier-Stokes equations in a channel. Preliminary results in the low viscous range seem to indicate that the approach is viable.
Keywords :
Monte Carlo simulation , Particle method , Transitional Flow , Rarefied gases
Journal title :
Journal of Computational and Applied Mathematics
Serial Year :
1999
Journal title :
Journal of Computational and Applied Mathematics
Record number :
1549710
Link To Document :
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