Pressure dependence of the instability of multiwalled carbon nanotubes conveying fluids
Pressure dependence of the instability of multiwalled carbon nanotubes conveying fluids
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DOI：
10.1007/s00419-007-0184-3
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发表时间：
2008
影响因子：
2.8
通讯作者：
X. He;C. M. Wang;Y. Yan;L. X. Zhang;G. Nie
中科院分区：
文献类型：
--
作者：
X. He;C. M. Wang;Y. Yan;L. X. Zhang;G. Nie
基于弹性梁模型，研究了多壁碳纳米管（MWCNTs）内部流体运动引起的不稳定性。在临界流速下，MWCNTs变得不稳定，并发生干草叉分叉和随后的Hopf分叉。这些临界速度随着内半径的减小而迅速增加，并与长度与外半径之比成反比。研究了管间范德华相互作用（vdW）的影响，发现vdW相互作用总体上可以增强MWCNTs的稳定性，但vdW相互作用降低了内半径很小的MWCNTs的稳定能力。
Based on an elastic beam model, the instability of multiwalled carbon nanotubes (MWCNTs) induced by the moving fluid inside is investigated. At critical flow velocities, the MWCNTs become unstable and undergo pitchfork bifurcation and subsequently Hopf bifurcation. These critical velocities are found to increase very quickly with respect to decreasing inner radius and are inversely proportional to the length-to-outer-radius ratio. The effect of the van der Waals (vdW) interaction between tubes is investigated and it is found that the vdW interaction can enhance the stability of MWCNTs in general, but the vdW interaction reduces the stability capacity of MWCNTs with very small inner radius.