CFD-based numerical analysis of a variable cross-section cylinder |
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Authors: | Jinlong Duan Weiping Huang |
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Institution: | 1. Department of Ocean Engineering, Shandong Key Laboratory of Ocean Engineering, Engineering College, Ocean University of China, Qingdao, 266100, P. R. China
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Abstract: | Using ANSYS-CFX, a general purpose fluid dynamics program, the vortex-induced vibration (VIV) of a variable cross-section cylinder is simulated under uniform current with high Reynolds numbers. Large eddy simulation (LES) is conducted for studying the fluid-structure interaction. The vortex shedding in the wake, the motion trajectories of a cylinder, the variation of drag and lift forces on the cylinder are analyzed. The results show that the vortices of variable cross-section cylinder are chaotic and are varying along the cylinder. In places where cross-sections are changing significantly, the vortices are more irregular. The motion trail of the cylinder is almost the same but irregular. The drag and lift coefficients of the cylinder are varying with the changes of diameters. |
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Keywords: | variable cross-section cylinder large eddy simulation fluid-solid interaction drag coefficient lift coefficient vortex shedding |
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