Abstract The study of the nuclear source term requires the computation of aerosol dynamics. Solutions to the aerosol general dynamic equation (GDE) are difficult to obtain by analytical or numerical methods when more realistic problems are considered. The direct simulation Monte Carlo (DSMC) technique is capable of simulating aerosol evolution reducing simplifications in the implementation of the aerosol GDE. In this work we present a DSMC program for the simulation of multicomponent polydisperse aerosol evolution, with the successful integration of the following processes: deposition, electrostatic dispersion, coagulation (considering charge effects), and condensation, assuming a spatially homogeneous medium and spherical particles. Two problems with different particle compositions were simulated to obtain information about the interactions through the different processes and the interacting particles as well as particle number and mass distributions with discrimination of charge levels. This information allowed us to explore the synergistic nature of these processes. It was found that the problem with denser particles had an overall stronger activity in coagulation and initially a stronger activity in deposition compared to the problem with less dense particles.

中文翻译：

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多组分带电气溶胶演化模拟

摘要 核源项的研究需要对气溶胶动力学进行计算。当考虑更现实的问题时，很难通过解析或数值方法获得气溶胶通用动力学方程 (GDE) 的解。直接模拟蒙特卡罗 (DSMC) 技术能够模拟气溶胶演化，从而减少气溶胶 GDE 实施中的简化。在这项工作中，我们提出了一个 DSMC 程序，用于模拟多组分多分散气溶胶演化，成功整合了以下过程：沉积、静电分散、凝结（考虑电荷效应）和冷凝，假设空间均匀的介质和球形颗粒。模拟了具有不同粒子组成的两个问题，以获得有关通过不同过程和相互作用粒子的相互作用以及粒子数量和质量分布以及电荷水平区分的信息。这些信息使我们能够探索这些过程的协同性质。发现与具有较小密度颗粒的问题相比，具有较大密度颗粒的问题在凝结方面具有整体更强的活性并且最初在沉积中具有更强的活性。