颗粒流体系统微观模拟中的粒子方法研究

Macro-scale simulation of particle-fluid systems is important but difficult for chemical engineering, power engineering and meteorology etc., and microscopic simulation is its indispensable foundation. Owing to the discrete nature of the world, the emerging particle methods are advantageous in this field. This research has compared the rewards and penalties of using some major particle methods in microscopic simulation and thereby improved the approach proposed by the group itself. The framework of a parallel algorithm applicable for different particle methods has been developed and demonstrated for its high efficiency. The conducted simulations are very helpful for exploring the mechanism of particle-fluid systems and has been applied successfully in a designing calculation of Baosteel in Shanghai.

对颗粒流体系统的宏观模拟是化工，动力和气象等研究的重点和难点，而微观模拟是其必需的基础。粒子方法在此具有明显优势。本研究将详细比较各粒子方法的优劣，并由此提出新模型。同时研究系统的微观统计规律，提出描述非平衡状态的新参量，并应用于宏观模拟。为此还将建立一个粒子方法的通用计算平台。