黏弹性流体基纳米流体流变学特性

doi:10.3969/j.issn.0438-1157.2014.z1.032

化工学报 ›› 2014, Vol. 65 ›› Issue (S1): 199-205.DOI: 10.3969/j.issn.0438-1157.2014.z1.032

黏弹性流体基纳米流体流变学特性

阳倦成, 徐鸿鹏, 李凤臣

哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001

收稿日期:2014-02-10 修回日期:2014-02-24 出版日期:2014-05-30 发布日期:2014-05-30
通讯作者: 李凤臣
基金资助:
国家自然科学基金项目（51076036）；国家自然科学基金委创新研究群体（51121004）；哈尔滨工业大学基础研究杰出人才培育计划项目（HIT.BRET1.2010008）。

Rheological properties of vicoelastic fluid based nanofluid

YANG Juancheng, XU Hongpeng, LI Fengchen

School of Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Received:2014-02-10 Revised:2014-02-24 Online:2014-05-30 Published:2014-05-30
Supported by:
supported by the National Natural Science Foundation of China (51076036), the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (51121004) and the Fundamental Research Funds for the Central Universities (HIT.BRET1.2010008).

摘要/Abstract

摘要： 黏弹性流体基纳米流体（viscoelastic fluid based nanofluid，VFBN）是一种具有湍流减阻和对流换热相对强化特性的新型换热工质，其湍流减阻机理与流变学特性关系密切。通过对以2.5×10^-3、5×10^-3、1×10^-2三种质量分数的十六烷基三甲基氯化铵/水杨酸钠水溶液为基液，粒子体积分数为0.1%、0.25%、0.5%、1.0%的铜纳米流体的剪切黏度、零剪切黏度以及松弛时间的测量，实验结果表明VFBN有明显的剪切稀变特性，同时纳米粒子的添加增大了基液的零剪切黏度，并导致基液黏弹性增强。以Giesekus本构模型为理论基础，利用实验参数得到了描述VFBN剪切黏度的实验关联式。

关键词: 纳米流体, 黏弹性流体, 界面流变学, 剪切黏度实验关联式, 纳米粒子, 黏度

Abstract: Viscoelastic fluid based nanofluid (VFBN) takes the advantages of turbulent drag reduction and convective heat transfer enhancement. Rheological properties of viscoelastic fluid are related with the mechanism of turbulent drag reduction. In order to get the rheology properties of VFBN, the VFBN with aqueous solution of cetyltrimethylammonium chloride/sodium salicylate as viscoelastic base fluid and copper nanoparticles as suspended nanoparticles was prepared. The mass fraction of viscoelastic fluids are 2.5×10^-3, 5×10^-3and 1×10^-2, and the corresponding volume fraction of copper (spherical) nanoparticles are 0.1%, 0.25%, 0.5% and 1.0%, respectively. Experimental results indicate that VFBN shows obvious shear-thinning characteristics, the suspended nanoparticles can increase the zero-shear viscosity and enhance the viscoelasticity of base fluid. Based on the Giesekus constitutive equation, fitted correlations for the measured shear viscosity of VFBN have been obtained by modifying some experimental parameters.

Key words: nanofluid, viscoelastic fluid, interfacial rheology, experimental correlations of shear viscosity, nanoparticles, viscosity

中图分类号:

O373

阳倦成, 徐鸿鹏, 李凤臣. 黏弹性流体基纳米流体流变学特性[J]. 化工学报, 2014, 65(S1): 199-205.

YANG Juancheng, XU Hongpeng, LI Fengchen. Rheological properties of vicoelastic fluid based nanofluid[J]. CIESC Journal, 2014, 65(S1): 199-205.

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黏弹性流体基纳米流体流变学特性

Rheological properties of vicoelastic fluid based nanofluid

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