CFD Simulation and Analysis of Fluid Induced Vibration in Pipe System

Abstract

The current research deals with vibration induced due to flow of fluid in different sections such as circular and square. The vibration is due to turbulence in the flow process of fluid. This occurs as the major flow follows discontinuities such as irregular bending, tees, incomplete close of valves and small-bore connections. The variation of vibration significantly depends on designing pipe sections, stiffness of supporting configuration and way of operating valves. Designing of pipe sections using ANSYS SPACECLAIM in which three types of sections are designed such as straight rectangular section, rectangular section bent with sharp outer corner and rectangular section bent with round corners. All these sections induce different levels of vibration depending on downstream kinetic energy at low frequency. Then computational fluid dynamics simulation, FLUENT launcher is used for simulation with specific dimensions of geometry which consist of both solid and fluid regions. Boundary conditions are updated with low frequency as 20Hz.The analysis and post-processing of pipe system, the inlet valve velocity is given as 5 m/s and outlet valve velocity is retained with default velocity. The SST k-omega turbulence model is selected and analysed with boundary condition. Finally, post processing two contours are created representing static pressure and velocity magnitude.