Simulations of Agglomerate Collisions with Smooth Particle Hydrodynamics - Realistic Material Properties and Sticking, Bouncing and Fragmentation Statistics

我们将利用一个完全并行化的平滑粒子流体动力学(SPH)程序来研究前行星体之间碰撞的结果，该程序被扩展来模拟固体和多孔体的行为，以便为Forschergruppe中使用的全球凝血模型提供粘滞、反弹和碎裂统计数据。在该项目中，我们将开发一种增强的、热力学上限制较少的孔隙度模型，该模型将允许处理重要的附加材料和更现实的环境。通过进行广泛的参数研究，我们最终将建立一般物质参数与粘滞、反弹和碎裂统计之间的依赖关系，从而我们将能够预测适合于凝聚生长的前行星体的物质参数。此外，我们将协助Forschergruppe进行碰撞实验的实验室项目，通过对其实验装置进行数值模拟来研究多孔材料的性质，以更好地了解实验结果和潜在的物理过程。

We will investigate the outcome of collisions between pre-planetesimals, utilizing a fully parallelised Smoothed Particle Hydrodynamics (SPH) code extended to simulate the behaviour of solid and porous bodies, in order to provide sticking, bouncing, and fragmentation statistics for global coagulation models used within the Forschergruppe. Within the project, we will develop an enhanced and thermodynamically less restrictive porosity model which will allow the treatment of important additional materials and more realistic environments. By performing broad parameter studies, we eventually will establish dependency laws between general material parameters and sticking, bouncing, and fragmentation statistics, and thus we will be able to predict those material parameters for pre-planetesimals which are suitable to allow coagulational growth. Furthermore, we will assist the laboratory projects of the Forschergruppe which perform collision experiments to investigate the properties of porous materials, by numerically simulating their experimental set-ups to gain better understanding of the experimental outcome and the underlying physical processes.