三维Kolmogorov流动弹性湍流直接数值模拟研究  

Direct Numerical Simulation Study on Elastic Turbulence in Three Dimensional Kolmogorov Flow

作　　者：张红娜[1] 李凤臣[1] 蔡伟华[1] 阳倦成[1] 李小斌[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2011年第6期973-976,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.10872060)

摘　　要：黏弹性流体弹性湍流现象是在极低雷诺数下(惯性效应可以忽略),完全由流体弹性引起的复杂湍流现象,在此条件下牛顿流体处于层流流态。该现象不仅具有与惯性湍流类似的一些特征,还具有其独特的特性,此外,其诱发机理与惯性湍流完全不同。为了更深刻地认识弹性湍流特性及其产生机理,本文基于三维Kolmogorov流动采用直接数值模拟研究了该现象,包括弹性湍流流场及变形场特性,并在此基础上分析了其产生机理。The elastic turbulence in viscoelastic fluids occurring at extremely low Reynolds number （inertia effects can be ignored）is a complex flow phenomenon and completely induced by the elasticity of fluid,while the Newtonian fluids flow are stable at the same condition.This phenomenon not only has the same characteristic with inertia turbulence,but also has its own features,but with different physical mechanism.Direct numerical simulations are carried out in the present paper to study this phenomenon in three dimensional Kolmogorov flow to gain a deeper understanding of the mechanisms and properties of elastic turbulence,including the velocity and polymer conformation characteristics. Based on the results,the mechanism of elastic turbulence is analyzed.

关 键 词：黏弹性流体 弹性湍流 Kolmogorov流动 直接数值模拟 

分 类 号：TQ423.3[化学工程]