Wave characteristics of single-walled fluid-conveying carbon nanotubes subjected to multi-physical fields

• Nonlocal Timoshenko beam model is applied to study Single-walled carbon nanotubes.
• Wave behaviour of Single-walled carbon nanotubes (SWCNTs) is discussed.
• Wave characteristics of SWCNTs conveying fluids are studied.
• The fluid velocity and density can make the nanotubes more flexible.
• The complex physical fields make the nanotubes stiffer.

Wave propagation in single-walled carbon nanotubes (SWCNTs) conveying fluids and placed in multi-physical fields (including magnetic and temperature fields) is studied in this paper. The nanotubes are modelled as Timoshenko beams. Based on the nonlocal beam theory, the governing equations of motion are derived using Hamilton's principle, and then solved by Galerkin approach, leading to two second-order ordinary differential equations (ODEs). Numerical simulations are carried out to verify the analytical model proposed in the present study, and determine the influences of the nonlocal parameter, the fluid velocity and flow density, the temperature and magnetic field flux change, and the surrounding elastic medium on the wave behaviour of SWCNTs. The results show that the nonlocal parameter has a considerable influence on dynamic behaviour of the nanotube and the fluid flow inside it. The results also show that the magnetic and temperature fields play an important role on the wave propagation characteristics of SWCNTs.

Wave propagation in single-walled fluid-conveying carbon nano-tubes in magnetic and temperature fields are studied using a nonlocal Timoshenko beam model. Strong influences of the nonlocal parameter the wave propagation and the fluid flow in the nanotubes.Figure optionsDownload as PowerPoint slide