Nowadays, carbon nanotubes (CNT) play an important role in practical applications in fluidic devices.To this end, researchers have studied various aspects of vibration analysis of a behavior of CNT conveying fluid. In this paper, based on nonlocal elasticity theory, single-walled carbon nanotube (SWCNT) is simulated. To investigate and analyze the effect of internal fluid flow on the longitudinal vibration and stability ofSWCNT, the equation of motion for longitudinal vibration is obtained by using Navier-Stokes equations. In the governing equation of motion, the interaction of fluid-structure, dynamic and fluid flow velocity along the axial coordinate of the nanotube and the nano-scale effec to the structure are con- sidered. To solve the nonlocal longitudinal vibration equation, the approximate Galerkin method is employed and appropriates imply supported boundary conditions are applied. The results show that the axial vibrations of the nanotubes strongly depend on the small-size effect. In addition, the fluid flowing in nanotube causes a decrease in the natural frequency of the system. It is obvious that the system natural frequencies reach zero at lower critical flow velocities as the wave number increases.Moreover, the critical flow velocity decreases as the nonlocal parameter increases.
کلید واژگان :Longitudinal vibration Carbon nanotube Fluid-structure interaction Nonlocal theory Viscous fluid Stability
ارزش ریالی : 600000 ریال
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