报告题目：Energy Minimization and Preconditioning in the Simulation of Athermal Granular Materials in 2D

报 告 人：王浩磊 博士 上海交通大学

报告时间：2019年11月28日 下午13：30-14：30

报告地点：数学楼第二报告厅

报告摘要:

Granular materials are conglomeration of discrete solid, macroscopic particles, which are ubiquitous in many scientific and engineering applications such as chemical engineering, fluid mechanics, geomechanics, pharmaceutics, and so on. Granular materials pose a great challenge to predictability, due to the presence of critical phenomena and large fluctuation of local forces. In this talk, we consider the quasi-static simulation of the dense granular media, and investigate the performances of typical minimization algorithms such as conjugate gradient methods and quasi-Newton methods (L-BFGS). Furthermore, we develop preconditioning techniques to enhance the performance. Those methods are validated with numerical experiments for typical physically interested scenarios such as the jamming transition, the scaling law behavior close to the jamming state, and shear deformation of over jammed states.

报告人简介：

王浩磊，上海交通大学自然科学研究院博士，主要研究方向为材料科学中的多尺度建模和仿真，有助于发现新材料和优化现有材料，在SCI和国内外重要刊物上发表论文多篇。