SBIR Phase II: Large Eddy Simulations (LES) of Gas-Particle Flows

SBIR 第二阶段：气体粒子流的大涡模拟 (LES)

• 批准号: 9983395
• 负责人: Shivshankar Sundaram
• 金额: $ 39.99万
• 依托单位: CFD RESEARCH CORPORATION
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983395&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Large; Eddy

This Small Business Innovation Research (SBIR) Phase II project will further develop, validate and demonstrate Large Eddy Simulations (LES) for the prediction of gas-particle flow phenomena. The Phase I study has clearly demonstrated the feasibility of using a commercial CFD code to perform Gas-Particle Large Eddy Simulations in flows with simple geometry. Good predictions of particulate dispersion, deposition and agglomeration in isotropic and channel turbulent flows have been obtained. The Phase II study will refine the models and techniques developed in Phase I and extend them to simulate more complex flows, in practical geometries. The Phase II work will be focused on the following main areas: unstructured and mixed element (adaptive cartesian) grids (driven by the need for fast and accurate simulations; adaptation and implementation of advanced sub-grid scale models and particle transport in these alternative grid topologies; implementation of enhanced particle sub-grid scale models for (a) fluid sub-grid scale (SGS) velocity (b) deposition and (c) agglomeration; extensive and systematic validation in channel, free shear and mixing layer flows; technology demonstration using a practical contaminant transport simulation. A team of experienced investigators and strongly interested end-users of this capability (Aerodyne Research, PLG, Dura Pharmaceuticals) has been assembled. The end-product of the Phase II effort will be an Integrated Large Eddy Simulation System for gas-particle flows (featuring advanced gridding, solver and visualization software). Gas-particle processes cannot usually be well-understood without a detailed consideration of the complex and usually highly nonlinear interaction between the flow and the motion of the particles. The developed Integrated Large Eddy Simulation System will foster a better fundamental understanding of dilute particulate turbulent flows in complex geometries. It will enable improved engineering design in a variety of fields such as air pollution control and chemical/bio-terrorism programs to chemical/pharmaceutical/semiconductor processing. The product developed at the end of Phase II will put a sophisticated physics simulator heretofor only avaialbe with academicians and that too in simple flow situations, in the hands of a trained industrial engineer enabling him to better understand and improve the processes of concern.

这个小企业创新研究（SBIR）第二阶段项目将进一步开发，验证和演示大涡模拟（LES）用于预测气粒流动现象。第一阶段的研究已经清楚地证明了使用商业计算流体动力学代码在具有简单几何形状的流动中进行气粒大涡模拟的可行性。对各向同性湍流和槽道湍流中的颗粒分散、沉积和团聚进行了较好的预测。第二阶段研究将完善第一阶段开发的模型和技术，并将其扩展到模拟实际几何形状中更复杂的流动。第二阶段的工作将集中在以下主要领域：非结构化和混合元素（自适应网格）网格（由于需要进行快速和准确的模拟;采用和实施先进的次网格尺度模型和这些替代网格拓扑结构中的粒子输运;（a）流体亚网格尺度（SGS）速度（B）沉积和（c）凝聚的增强颗粒亚网格尺度模型的实施;在通道、自由剪切和混合层流中进行广泛和系统的验证;使用实际污染物输运模拟进行技术演示。 已经组建了一支由经验丰富的研究人员和对此能力强烈感兴趣的最终用户（Aerodyne Research、PLG、Dura Pharmaceuticals）组成的团队。 第二阶段工作的最终产品将是一个用于气粒流的综合大涡模拟系统（具有先进的网格、求解器和可视化软件）。如果不详细考虑流动和颗粒运动之间复杂且通常高度非线性的相互作用，通常就不能很好地理解气体-颗粒过程。开发的集成大涡模拟系统将促进更好地了解在复杂的几何形状的稀颗粒湍流。它将使各种领域的工程设计得到改进，例如空气污染控制和化学/生物恐怖主义计划，以及化学/制药/半导体加工。在第二阶段结束时开发的产品将把一个复杂的物理模拟器放在这里，只有学者才能使用，而且在简单的流动情况下，在受过训练的工业工程师手中，使他能够更好地理解和改进所关注的过程。