Multiscale nature of complex fluid-particle systems
Multiscale nature of complex fluid-particle systems
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DOI：
10.1021/ie0011021
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发表时间：
2001-05
影响因子：
4.2
通讯作者：
Jinghai Li;M. Kwauk
中科院分区：
文献类型：
--
作者：
Jinghai Li;M. Kwauk
大多数多相化学反应器是复杂系统。本文探讨了化工复杂系统的多尺度特性和尺度放大效应的内在机理。多尺度和伪粒子两种方法进行了讨论，我们认为这是有效的和有前途的揭示潜在的机制和提取简单的复杂系统。非均相结构是复杂系统最重要的特征，也是反应器放大的一个重要方面。多尺度方法在描述非均匀结构时遵循结构分辨策略，在定义变分准则时遵循机制折衷策略。伪粒子方法通过将流体离散为尺寸远小于真实的粒子尺寸的伪粒子来描述流体的非均质结构，即把流体与粒子的相互作用看作是真实的粒子与伪粒子之间的相互作用。本文概述了这两种方法各自的优势和前景，并探讨了理解复杂系统的一些概念。
Most multiphase chemical reactors are complex systems. This paper explores the multiscale nature of complex systems in chemical engineering and the intrinsic mechanism of the scale-up effect. Two approaches-multiscale and pseudoparticle-are discussed, which we believe to be effective and promising in revealing underlying mechanisms and extracting simplicity in complex systems. Heterogeneous structure, the most important characteristic of complex systems and a crucial aspect in scaling up reactors, is analyzed as the focus of this paper. The multiscale approach follows the strategy of structure resolution in describing the heterogeneous structure and mechanism compromise in defining the variational criterion. The pseudoparticle approach describes the heterogeneous structure by discretizing the fluid into pseudoparticles with a size much smaller than that of the real particles, that is, the particle-fluid interaction is treated as the interaction between real particles and pseudoparticles. This paper outlines the respective advantages and prospects of these two approaches and explores some concepts in understanding complex systems.