直接模拟蒙特卡罗法在稀薄气体模拟中获得了成功的应用。然而，在处理连续介质传热和流动问题时，模拟的速度极大地制约了该方法的应用。尤其对于大系统的连续流动，该方法的收敛速度几乎无法实现。鉴于此，本文通过引入超粒子，对直接模拟蒙特卡罗方法进行改进，并将其应用于连续介质传热和流动模拟之中。 The direct simulation Monte Carlo method has been successfully applied in thin gas simulation. However, the speed of simulation greatly limits the application of this method when dealing with heat transfer and flow problems in continuous media. Especially for the continuous flow of large systems, the convergence speed of this method is almost impossible to achieve. In view of this, this article improves the direct simulation Monte Carlo method by introducing super-particles, and applies it to the continuous medium heat transfer and flow simulation.