基于介尺度动态结构的气固EMMS模型扩展

项目名称： 基于介尺度动态结构的气固EMMS模型扩展

项目编号： No.91334107

项目类型： 重大研究计划

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 刘新华

作者单位： 中国科学院过程工程研究所

项目金额： 75万元

中文摘要： 气固能量最小多尺度（EMMS）模型的扩展不仅是发展和完善EMMS多尺度计算模式和实现虚拟过程工程(VPE)的需要，而且对复杂气固反应器的全系统多尺度稳态建模也具有重要的意义。本项目以气固两相系统中介尺度结构的形成和其加减速动态演化对系统非均匀性的影响这一科学问题为切入点，以基于介尺度动态结构的气固EMMS模型轴径向耦合二维扩展和气固EMMS鼓泡理论模型的建立为核心内容，拟解决气固两相流非均匀性表征、稀密相相间耗散分析与表达、以及多目标优化变分问题简化求解等关键问题，形成复杂气固反应器全系统多尺度稳态建模统一理论和相应的工业应用软件包，拓展EMMS理论宏尺度直接工业应用新领域，为化工工艺过程的设计和放大提供定量参考。

中文关键词： 气固流态化；介尺度动态结构；粒子图像测速；多尺度建模；稳态动力学

英文摘要： Extension of the gas-solid Energy-Minimization Multi-Scale (EMMS) model is not only the premise to improve the EMMS computation paradigm and to realize Virtual Process Engineering (VPE), but also of significance to total-system multi-scale steady-state modeling of complex gas-solid reactors. Taking the effects of the formation and dynamical evolution of meso-scale structures due to their acceleration or deceleration on the heterogeneity of gas-solid flow as a scientific breakthrough point, this project mainly aims to extend the gas-solid EMMS model in the two-dimensional spaces and various fluidization regimes based on meso-scale dynamical structures. Through addressing the key problems such as characterization of heterogeneity of gas-solid two-phase flow, analysis and computation of the interfacial energy dissipation rate between the dilute and dense phases, and simplified solution to a multi-objective variational problem, an unified theory for total-system multi-scale steady-state modeling of complex gas-solid reactors will be developed to form an industrial software package, so as to extend industrial application of the EMMS theory at macro-scale and to provide a quantitative reference for the design and scale-up of chemical processes.

英文关键词： Gas-solid fluidization；Meso-scale dynamical structure；Particle image velocimetry；Multi-scale modeling；Steady-state hydrodynamics