The Interactions of Finite-Sized Particles and Turbulence in Dispersed Two-Phase Flow

分散两相流中有限尺寸颗粒与湍流的相互作用

• 批准号: 9424169
• 负责人: Martin Maxey
• 金额: $ 21.87万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9424169&HistoricalAwards=false
• 关键词: Interactions; Finite; Sized; Particles; Turbulence

ABSTRACT CTS-9424169 M. Maxey The influence of spherical in the range of 10-500 (m on dispepsed, two-phase turbulent flow will be investigate. Numerical simulations for the motion of a large number of particles in suspension will include the coupling of the particle wakes and the turbulence. A multiple momentum procedure will be used to represent the effect of particles on local flow disturbances, for finite particle Reynolds number, in viscous fluids with concentrations up 5% by volume. The overall fluid flow field will be simulated with pseudo-special methods. Preferential particle concentrations due to local flow characteristics (vorticity, rate of strain), and the dynamic coupling of the particles with the small scale vorticity, will analyzed. The computational results will be compared to bubbly and slurry flow experiments. This study will help develop fundamental understanding for improved modeling of two-phase turbulent flow of interest in engineering and environmental applications. ***

摘要CTS-9424169 M.马克西 在10-500 μ m范围内，球形对分散的两相湍流的影响将被研究。 悬浮液中大量颗粒运动的数值模拟将包括颗粒尾流和湍流的耦合。 对于有限颗粒雷诺数，在浓度高达5%（体积）的粘性流体中，将使用多动量程序来代表颗粒对局部流动扰动的影响。 整体流体流场将采用拟空间方法进行模拟。 将分析由于局部流动特性（涡量、应变率）以及颗粒与小尺度涡量的动态耦合而产生的优先颗粒浓度。 将计算结果与泡状流和浆状流实验进行比较。 这项研究将有助于发展基本的理解，为改善建模的两相湍流的利益在工程和环境应用。 ***