Model reduction of single particle models for coupled DEM/CFD simulations (C04)

C4将开发出能够以相同分辨率预测粒子行为的方法，但计算成本比目前使用的单粒子模拟要小得多。更高效的单粒子模型是建立大规模常规DEM/CFD模拟方法的重要前提。本项目的具体目标是通过对扩散和反应过程的相关偏微分方程组进行模型降阶，加速单粒子模型在空间和时间上的解析。C4最终提供了一种系统的方法，将这些高分辨率的描述转化为低维的常微分方程组。其中一些主要挑战是过程的多物理特性(如反应、扩散、多相热力学)以及颗粒表面的时空变化的边界条件，这需要量身定做的方法和实现。

C4 will develop methods that allow to predict particle behaviour with the same resolution but at a much smaller computational cost than the single particle simulations used today. More efficient single particle models are a crucial prerequisite for establishing large-scale DEM/CFD simulation methods for routine use. The specific goal of the present project is to accelerate spatially and temporally resolved single particle models by means of model reduction of the associated partial differential equations for diffusive and reactive processes. C4 ultimately provides a systematic method for turning these high resolution descriptions into systems of low-dimensional ordinary differential equations. Some of the main challenges are the multiphysics character of the processes (e.g. reaction, diffusion, multiphase thermodynamics) and spatially and temporally varying boundary conditions at the particle surface, which require tailor-made methods and implementations.