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本文评述了计算流体力学在化学化工研究和开发中的重要地位,介绍了各种模拟方法研究的现状、存在的困难和一些发展中的前沿领域。与传统应用领域相比,化学工程领域主要面对的是复杂多相流体系统及流动、传递和反应相耦合的过程,基于单尺度统计平均的传统连续介质方法已很难满足对产品结构和过程工艺精确设计的要求,而多尺度方法与粒子方法的结合是一条有效的途径。它通过对复杂系统满足的稳定性条件的分析以及对复杂界面和间断性的合理描述实现跨尺度关联的模拟,从而量化介观结构与行为、建立准确的宏观模型。这种结合无论是对湍流、汽液或气固多相流等传统的难题,还是对微流动、生物流、聚合物流动、颗粒流及散料力学等前沿领域,都带来了新的可能性,也将为化学化工领域的研发工作提供更有力的手段。
This article reviews the important position of Computational Fluid Dynamics (CFD) in the research and development of chemical and chemical engineering, introduces the present situation and existing difficulties of various simulation methods and some developing frontier fields. Compared with the traditional applications, chemical engineering mainly faces the complex multi-phase fluid system and flow, transfer and reaction phase coupling process based on single-scale statistical average of the traditional continuous media method has been difficult to meet the product structure and process The precise design of the process requirements, and the combination of multi-scale method and particle method is an effective way. It realizes the cross-scale correlation simulation through the analysis of the stability conditions of the complex system and the reasonable description of the complex interface and discontinuity so as to quantify the mesoscopic structure and behavior and establish an accurate macro model. This combination offers new possibilities both for traditional challenges such as turbulent flow, vapor-liquid or gas-solid multiphase flow and for cutting-edge fields such as microfluidics, bio-flow, polymer flow, particle flow and bulk mechanics Sexuality will also provide a more powerful tool for R & D in the chemical and chemical fields.