Vectorization of a Monte Carlo Simulation Scheme for Nonequilibrium Gas Dynamics
Abstract
The numerical performance of a Monte Carlo scheme used in the analysis of nonequilibrium gas dynamics has been greatly improved. This improvement is attained by careful implementation of the algorithm in order to take advantage of the vector hardware of supercomputers. The performance of the modified implementation is demonstrated by application to three different flow problems. First, the onedimensional standing shock wave is considered. Due to the relative simplicity of this example, it is shown that an adequate solution is obtained in a very small computational time. The second problem considered is the flow of an expanding gas through an axisymmetric nozzle. Lastly, the hypersonic flow of argon over a threedimensional wedge is computed. This problem illustrates the increase in the number of molecules which may be employed in the simulation due to the improved performance of the algorithm. In fact, over 10 million particles are employed which is the largest number reported in the literature for the simulation scheme considered.
 Publication:

Journal of Computational Physics
 Pub Date:
 October 1991
 DOI:
 10.1016/00219991(91)90243E
 Bibcode:
 1991JCoPh..96..411B
 Keywords:

 Computerized Simulation;
 Gas Dynamics;
 Monte Carlo Method;
 Nonequilibrium Flow;
 Axisymmetric Flow;
 Computational Fluid Dynamics;
 Mach Number;
 Nozzle Flow;
 Temperature Profiles;
 Wedge Flow;
 Fluid Mechanics and Heat Transfer