Analytic, Simulation and Experimental Analysis of Fluid-Pipe Systems
Abstract: Inviscid ﬂuid inside thin pipe system is ﬁrst analytically solved for eigenfrequencies and eigenmodes using Modal Interaction Model method with ﬂuid-structure interaction condition at boundary. Shear-diaphragm boundary condition is used for comparing and validating Analytic results with Simulation using COMSOL Multiphysics. Effect of viscosity is also compared using Newtonian ﬂuid model. Experiment is performed using simple pipe geometry and ﬂuid to measure transfer accelerance which is post-processed to extract cirumferential modes up to order 4; this is used to compare and validate Experiemental results with Simulation. Good correlation is obtained between Analytic, Experiment and Simulation results with n=0 breathing modes requiring modiﬁcation of governing equations to incorporate compressibility effects due to changing pipe cross-section area.
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