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黏弹性流体纯弹性不稳定现象研究综述
引用本文:阳倦成,张红娜,李小斌,蔡伟华,张彦,李凤臣. 黏弹性流体纯弹性不稳定现象研究综述[J]. 力学进展, 2010, 40(5): 495-516. DOI: 10.6052/1000-0992-2010-5-lxjzJ2009-095
作者姓名:阳倦成  张红娜  李小斌  蔡伟华  张彦  李凤臣
作者单位:1.哈尔滨工业大学能源科学与工程学院
基金项目:国家自然科学基金项目(10872060); 教育部新世纪优秀人才支持计划项目(NCET-07-0235)资助~~
摘    要:近年来粘弹性流体流动的弹性不稳定性现象引起了越来越多学者的关注与研究,与牛顿流体惯性不稳定现象不同,这种现象是由粘弹性流体流动中的弹性应力和粘性力之间相互作用,使得在较低的雷诺数下即可产生复杂的流动分岔不稳定现象。当流动中的弹性数(表现为 Deborah 数 De 与Reynolds 数Re 的比值,其中 De 数定义为粘弹性流体的松弛时间和流动的特征时间的比值,Re 数表征流动中惯性力与粘性力之比)较大时,在 Re<
关 键 词:粘弹性流体,不稳定性,Deborah 数,弹性应力,惯性应力
收稿时间:2009-07-02
修稿时间:2010-05-17

REVIEW OF PURELY ELASTIC INSTABILITIES IN VISCOELASTIC FLUIDS
YANG Juancheng , ZHANG Hongna , LI Xiaobin , CAI Weihua , ZHANG Yan , LI Fengchen. REVIEW OF PURELY ELASTIC INSTABILITIES IN VISCOELASTIC FLUIDS[J]. Advances in Mechanics, 2010, 40(5): 495-516. DOI: 10.6052/1000-0992-2010-5-lxjzJ2009-095
Authors:YANG Juancheng    ZHANG Hongna    LI Xiaobin    CAI Weihua    ZHANG Yan    LI Fengchen
Affiliation:YANG Juancheng ZHANG Hongna LI Xiaobin CAI Weihua ZHANG Yan LI Fengchen School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
Abstract:Recently, more and more attention and research efforts have been paid to the elastic instabilities. Different from the Newtonian fluid instabilities induced by inertial stress, elastic instabilities are generated by the interaction between elastic stress and inertial stress that induces flow bifurcations even at extremely low Reynolds number (Re). When the elasticity number (defined as the ratio between Deborah number De, defined as the ratio between the relaxation time of viscoelastic fluid and the charact...
Keywords:viscoelastic fluids  flow instabilities  Deborah number  elastic stress  inertial stress  
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