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

我们将调查前星子之间的碰撞的结果，利用一个完全并行的光滑粒子流体动力学（SPH）代码扩展到模拟固体和多孔体的行为，以提供粘，反弹，和破碎的统计数据，全球凝固模型内使用的Forschergruppe。在该项目中，我们将开发一个增强的、限制性更小的孔隙度模型，该模型将允许处理重要的附加材料和更真实的环境。通过进行广泛的参数研究，我们最终将建立一般的材料参数和粘附，弹跳和破碎统计之间的依赖关系，因此，我们将能够预测这些材料参数的pre-planetesimals是合适的，允许凝结生长。此外，我们将协助Forschergruppe的实验室项目进行碰撞实验，以研究多孔材料的性质，通过数值模拟他们的实验装置，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.