Nanoscale fluid-structure interaction: Flow resistance and energy transfer between water and carbon nanotubes
Chao Chen, Ming Ma, Kai Jin, Jefferson Zhe Liu, Luming Shen, Quanshui Zheng, Zhiping Xu
Physical Review E | AMER PHYSICAL SOC | Published : 2011
We investigate here water flow passing a single-walled carbon nanotube (CNT), through analysis based on combined atomistic and continuum mechanics simulations. The relation between drag coefficient C(D) and Reynolds number Re is obtained for a wide range of flow speed u from 5 to 600 m/s. The results suggest that Stokes law for creep flow works well for small Reynolds numbers up to 0.1 (u ≈ 100 m/s), and indicates a linear dependence between drag force and flow velocity. Significant deviation is observed at elevated Re values, which is discussed by considering the interfacial slippage, reduction of viscosity due to friction-induced local heating, and flow-induced structural vibration. We fin..View full abstract
Awarded by National Science Foundation of China
We thank Dr. Yilun Liu for his help on the analysis of our simulation results. This work is supported by Tsinghua University through the Key Talent Support Program, and the National Science Foundation of China through Grant No. 11002079 (Z.X.). Z.L. would like to acknowledge Small Grant 2010 from the engineering faculty of Monash University. L. S. appreciates support from the University of Sydney through the International Program Development Fund. Q.S.Z. acknowledges the National Science Foundation of China, Grants No. 10832005 and No. 10672089. The work is also supported by Shanghai Supercomputer Center of China.