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iDEA: Drexel E-repository and Archives > Drexel Academic Community > College of Engineering > Department of Civil, Architectural,and Environmental Engineering > Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] > Reynolds number effect on the interaction of an elastic circular cylinder and its ambient fluid flow

Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/1515

Title: Reynolds number effect on the interaction of an elastic circular cylinder and its ambient fluid flow
Authors: Jeng, Shain-Woei
Lu, Chieh-Chih
Keywords: Modeling of confined flows;Computational hydraulics
Issue Date: 12-Sep-2006
Publisher: Michael Piasecki and College of Engineering, Drexel University
Citation: Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732
Abstract: The vortices shedding from the downstream surface of a cylindrical structure cause periodic variations of the lift and drag forces, which then produce vibrations. The vibration also changes the pattern of vortex shedding. This mutual effect is called fluid-structure interaction. The interaction of a rigid cylinder supported elastically and its ambient incompressible fluid flow was simulated numerically in this study. The flow field is obtained first by solving the Navier-Stokes equations using the primitive method. Then, the lift and drag forces on the cylinder are computed. With the forces, the vibration of the cylinder may be calculated by applying Newton’s second law of motion. At the next time step, the motion of the cylinder decides the boundary conditions and the acceleration term of the momentum equation since a moving coordinate system is adopted for the flow field calculation. The objective of this paper is to discuss the Reynolds number (Re) effect on this interactive system. Results showed that the cylinder moved periodically along a figure”8” path. At lower Re, the peak lift force in the resonant region was significantly higher, and the natural frequency at which peak lift occurred was larger. The Re-effect on the resonant region, the root mean square of the lift force, the time average of the drag force, and cylinder vibration are also discussed in this paper.
Description: Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE) hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization.
URI: http://hdl.handle.net/1860/1515
ISBN: 0977447405
Appears in Collections:Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]

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