Strong mechanical coupling between the carbon nanotube and the inner streaming water flow

Y. D. Kuang, San-Qiang Shi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

The mechanical coupling between the carbon nanotube (CNT) and the inner streaming water flow is investigated using non-equilibrium molecular dynamics simulations. A strong coupling is found at a critical streaming velocity and such coupling results in the local buckling of single-walled or multi-walled CNTs. The flow-excited radial resonance and the drastic energy exchange-induced radial deformation amplification of the tube contribute to the occurrence of buckling. The tube instability in turn gives rise to the unstable water transport. In contrast to instability occurrence of lamped–lamped macropipes conveying fluid, fully fixing tube’s boundary atoms may eliminate such instability. Combined with the finite element analysis, the effects of the tube size, hydrostatic pressure, van der Waals interaction strength, and the tube wall number on the buckling are discussed. The unusual result is that increasing the hydrostatic pressure weakens the tube’s stability.
Original languageEnglish
Pages (from-to)1053-1060
Number of pages8
JournalMicrofluidics and Nanofluidics
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Buckling instability
  • Carbon nanotubes
  • Finite element analysis
  • Molecular flow
  • Non-equilibrium molecular dynamics simulations

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

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