中文摘要：

比较了小型机群中模拟小规模粒子系统采用原子分解和区域分解算法的模拟时间。针对原子分解算法,优化了各进程粒子的受力计算,尤其对严重影响并行效率的全局通信进行了优化,最终使得并行效率提高了30%以上。使用该优化算法对固态氩的导热系数进行了计算,模拟结果与实验值比较吻合,大大缩短了时间。

英文摘要：

This paper compared the simulation time of adopting atom-decomposition algorithm and domain-decomposition algo- rithm when simulating small-scale atom system in small-scale cluster. According to the atom-decomposition algorithm, optimized the force calculation of every processer and global communication which affected the parallel efficiency seriously, And it would enhance the parallel efficiency to more than 30%, At last calculated the thermal conductivity of solid argon by the use of the optimized algorithm, The simulation results are very consistent with the experimental ones, and the simulation time has reduced much.