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首页> 外文期刊>Computer physics communications >Multiphase and multiphysics particle in cell simulation of soot deposition inside a diesel particulate filter single channel
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Multiphase and multiphysics particle in cell simulation of soot deposition inside a diesel particulate filter single channel

机译：柴油微粒过滤器单通道内烟灰沉积的细胞模拟中的多相和多物理场粒子

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摘要

In the diesel particulate filters technology a key aspect is represented by the properties of the particulate matter that is collected inside their structure. The work presented is focused on the development of an innovative mathematical tool based on the particle-in-cell method (PIC) for the simulation of the soot distribution inside a single channel of a diesel particulate filter. The basic fluid dynamic equations are solved for the gas phase inside the channel using a novel technique based on the solution of the same set of equations everywhere in the system including the porous medium. This approach is presented as alternative to the more conventional methods of matching conditions across the boundary of the porous region where a Darcy-like flow is developed. The motion of the soot solid particles is instead described through a particle-by-particle approach based on Newton's equations of motion. The coupling between the dynamics of the gas and that of the soot particles, i.e. between these two sub-models, is performed through the implementation of the particle-in-cell technique. This model allows the detailed simulation of the deposition and compaction of the soot inside the filter channels and its characterization in terms of density, permeability and thickness. The model then represents a unique tool for the optimization of the design of diesel particulate filters. The details of the technique implementation and some paradigmatic examples will be shown.
机译：在柴油机微粒过滤器技术中，一个关键方面是通过收集在其结构内部的微粒物质的特性来表示的。提出的工作集中于开发基于单元粒子法（PIC）的创新数学工具，用于模拟柴油机微粒过滤器单通道内的烟尘分布。使用一种新颖的技术，基于包括多孔介质在内的系统中各处的同一组方程组的解，使用一种新颖的技术来求解通道内气相的基本流体动力学方程。提出了这种方法，以替代更传统的匹配条件的方法，该方法在形成达西流的多孔区域的边界上匹配条件。代替地，基于牛顿运动方程通过逐个颗粒的方法来描述烟灰固体颗粒的运动。气体和烟灰颗粒的动力学之间的耦合，即这两个子模型之间的耦合，是通过实现单元中的颗粒技术来实现的。该模型可以对烟灰在过滤器通道内的沉积和压实及其在密度，渗透性和厚度方面的特性进行详细模拟。然后，该模型代表了用于优化柴油机微粒过滤器设计的独特工具。将显示技术实现的细节和一些范例示例。

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