富勒烯纳米流体在石墨烯纳米孔隙中的边界滑移特性

发布时间：2018-06-20 23:29

本文选题：富勒烯纳米流体 + 石墨烯　；参考：《微纳电子技术》2017年07期

【摘要】：采用经典分子动力学方法探索了电场强度和富勒烯纳米颗粒浓度对水-富勒烯纳米流体在石墨烯纳米孔隙中Couette剪切流动特性的影响机理。结果表明:当剪切应变率超过临界剪切应变率时,边界滑移速率迅速增加,且临界剪切应变率随着电场强度的增强而增大;边界滑移速率和流体黏性值都随着富勒烯体积分数的增加而增大。当电场强度较小时,流体的流动表现为边界正滑移,但当电场强度达到临界值时,流体的流动存在边界负滑移;边界滑移速率先随着电场强度的增强而减小,直至电场强度达到临界值后,边界滑移速率随着电场强度的增强先减小后增大。富勒烯纳米流体的黏性值先随着电场强度的增强而增大,而当电场强度达到临界值后,纳米流体的黏性值则随电场强度的增强呈现先减小而后增大的趋势。
[Abstract]:The effects of electric field strength and concentration of fullerene nanoparticles on the shear flow characteristics of water-fullerene nanoparticles in graphene nano-pores were investigated by classical molecular dynamics method. The results show that when the shear strain rate exceeds the critical shear strain rate, the boundary slip rate increases rapidly, and the critical shear strain rate increases with the increase of electric field strength. Both the boundary slip rate and the fluid viscosity increase with the increase of the volume fraction of fullerene. When the electric field intensity is small, the fluid flow appears to be boundary positive slip, but when the electric field intensity reaches the critical value, the boundary slip exists, and the boundary slip rate decreases with the increase of electric field intensity. When the electric field strength reaches the critical value, the boundary slip rate decreases first and then increases with the increase of the electric field strength. The viscosity of fullerene nanofluids first increases with the increase of electric field strength, while when the electric field strength reaches the critical value, the viscosity value of the nanofluids decreases first and then increases with the increase of electric field strength.
【作者单位】：江苏大学微纳米科学技术研究中心;常州大学江苏省光伏科学与工程协同创新中心;江苏科技大学船舶与海洋工程学院;
【基金】：国家自然科学基金面上项目(11472117,11372298,51675236)
【分类号】：O35

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