大涡模拟中颗粒拉格朗日轨道方法的亚格子尺度脉动速度封闭模型
首发时间:2011-01-10
摘要:本文介绍了一种用于大涡模拟颗粒拉格朗日轨道方法的亚格子尺度脉动速度模型,指出其不同于目前的随机力模型和随机速度模型。这种新的拉格朗日轨道方法的封闭模型从亚格子尺度脉动速度控制方程出发,利用流动当地平衡假设。该封闭模型与亚格子尺度应力、湍流积分时间尺度以及颗粒弛豫时间相关。模型的进一步应用和比较性研究尚需展开。
关键词: 流体力学 亚格子尺度脉动 拉格朗日轨道模型 大涡模拟 两相湍流
For information in English, please click here
Closure model of SGS fluctuating velocity in particle Lagrangian trajectory method in large eddy simulation
Abstract:In this paper a new SGS fluctuating velocity model is proposed in particle Lagrangian trajectory method in large eddy simulation. It is different from the popular closure models of stochastic force model and stochastic velocity model. This closure model is derived from the governing equation of Sub-Grid-Scale (SGS) fluctuating velocity and utilized the assumption of local equilibrium between two phases. The present model is correlated with SGS stress, turbulent integral time scales and particle relaxation time scales. The further application and comparison study are expected to be done in the future.
Keywords: Fluid mechanics SGS fluctuation Lagrangian trajectory model large eddy simulation two-phase turbulent flows
论文图表:
引用
No.4403405562970129****
同行评议
勘误表
大涡模拟中颗粒拉格朗日轨道方法的亚格子尺度脉动速度封闭模型
评论
全部评论0/1000