摘要
凝并是影响粒子尺度分布时空演变的重要物理过程之一,对于直径较大的粒子,湍流凝并起到了主要作用,但很少有学者在粒子凝并的研究中考虑湍流的影响。主要针对大粒子,采用多重MonteCarlo算法求解包含粒子凝并的通用动力学方程,并同时考虑布朗凝并和湍流凝并的影响。发现考虑湍流凝并的影响后,粒子尺度分布随时间变化的数值解与理论解更加接近,与仅有布朗凝并的作用相比,相对误差降低,曲线的峰值降低,粒子的几何平均直径、标准差的数值解更接近理论解,并且线性冷凝和线性凝并同时存在情形下的改进程度大于纯线性凝并情形。
Coagulation is one of the most important physical processes affecting the spatial and temporal evolution of particle size distribution.For particles with larger diameter,turbulent coagulation plays a major role.However,few scholars consider the influence of turbulence in the study of particle coagulation.In this study,a Multi-Monte Carlo method is used to solve the General Dynamic Equation(GDE)involving particle distribution with larger diameter,considering the influence of both Brownian motion and turbulence.After considering the influence of turbulent coagulation,the numerical solutions of the time evolution of particle size distribution are closer to the theoretical solutions.The relative errors and the peak of the particle size distribution are reduced compared with only considering the role of Brownian coagulation.The numerical solutions of the particle geometric mean diameter and the standard deviation are closer to the theoretical solutions.The improvements of the special coagulation case considering both linear condensation and linear coagulation are greater than the special coagulation case considering only linear coagulation.
作者
李斐斐
刘伟
刘晓宏
LI Feifei;LIU Wei;LIU Xiaohong(Institute of Chemical Defense,AMS,PLA,Beijing 102205,China;Shanxi Dazhong Electronic Information Industry Group Co.,Ltd.,Taiyuan 030024,China)
出处
《核电子学与探测技术》
CAS
北大核心
2023年第3期452-459,共8页
Nuclear Electronics & Detection Technology
作者简介
李斐斐(1994-),女,山东济南人,助理研究员,博士,现主要从事核爆炸探测与核辐射监测技术的研究,电子邮箱:lifeifei007@126.com;通讯作者:刘伟(1979-),男,新疆托里县人,副研究员,博士,现主要从事核爆炸探测与核辐射监测技术的研究,电子邮箱:lw_email@126.com。
