Abstract
In this article, the instable velocity of fluid in the pipes with internal fluid is studied. The force induced by the fluid is assumed in radial direction and is obtained by Navier-Stokes equation considering viscosity of fluid. The displacements of the structure are assumed by thick shell element. The final equations are calculated by Hamilton's principle. Numerical procedure of differential quadrature (DQ) is utilised for presenting the instable velocity of fluid. The influences of length, radius and thickness of pipe as well as boundary conditions are shown on the instable velocity of fluid. The outcomes are compared with other published articles where shows good accuracy. Numerical results indicate that with enhancing the thickness of pipe, the instable velocity of fluid is increased. In addition, the instable velocity of fluid of clamped-clamped (CC) pipe is higher than other SS pipe.
Published Version
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