Vectorized Monte Carlo molecular aerodynamics simulation of theRayleigh problem

摘要

A fully vectorized version of a one-dimensional Monte Carloalgorithm applied to molecular aerodynamics is presented. The algorithmis applied to the Rayleigh problem, an impulsively accelerated, heatedflat plate, and is implemented on the CYBER 205. Issues relating to thedetails of vectorization, including the use of bit addressability, themaintaining of long vector lengths, and vector gather/scatter use, arediscussed. Speedup factors due to vectorization in the range of 5 to 18are reported, depending on problem parameters. The results indicate thatunder certain circumstances, the problem performs well on vectorarchitectures