Enhancing heat transfer at the micro-scale using elastic turbulence  

作　　者：R.D.Whalley W.M.Abed D.J.C.Dennis R.J.Poole 

机构地区：[1]School of Engineering,University of Liverpool [2]LMFA,Universite de Lyon,Ecole Centrale de Lyon

出　　处：《Theoretical & Applied Mechanics Letters》2015年第3期103-106,共4页力学快报（英文版）

基　　金：financial support from The Higher Committee for Education Development in Iraq and The Iraqi Ministry of Higher Education and Scientific Research

摘　　要：Small concentrations of a high-molecular-weight polymer have been used to create so-called ＂elastic tur- bulence＂ in a micro-scale serpentine channel geometry. It is known that the interaction of large elastic stresses created by the shearing motion within the fluid flow with streamline curvature of the serpentine geometry leads initially to a purely-elastic instability and then the generation of elastic turbulence. We show that this elastic turbulence enhances the heat transfer at the micro-scale in this geometry by up to 300% under creeping flow conditions in comparison to that achieved by the equivalent Newtonian fluid flow.Small concentrations of a high-molecular-weight polymer have been used to create so-called ＂elastic tur- bulence＂ in a micro-scale serpentine channel geometry. It is known that the interaction of large elastic stresses created by the shearing motion within the fluid flow with streamline curvature of the serpentine geometry leads initially to a purely-elastic instability and then the generation of elastic turbulence. We show that this elastic turbulence enhances the heat transfer at the micro-scale in this geometry by up to 300% under creeping flow conditions in comparison to that achieved by the equivalent Newtonian fluid flow.

关 键 词：Elastic turbulence Viscoelasticity Serpentine channel Micro-mixing Heat transfer 

分 类 号：O343[理学—固体力学] TK124[理学—力学]