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Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
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Author | Peng, Yaling Zhang, Zhiguo Wu, Fangliang Feng, Dakui |
Copyright Year | 2010 |
Abstract | 2-D computational analyses were conducted for unsteady viscous flow across cylinders of different geometries and different incident angle. Circular, square and elliptic (both at 0° and 90° angles of incidence) cylinders were examined. The calculations were performed by solving the unsteady 2-D Navier-Stokes equation at Re = 100. The calculated results produce drag and lift coefficients, as well as Strouhal number in excellent agreement with published data. Calculations for unsteady, incompressible 2D flow around a square cylinder at incidence angle of 0° and 45° and for Reynolds number = 100 were carried out. Cycle independence and grid independence results were obtained for the Strouhal number. The results were in excellent agreement with the available experimental and numerical results. Numerical results show that the Strouhal number increases with fluid angle of incidence on the cylinder. The wake behind the cylinder is wider and more violent for a square cylinder at 45° incidence compared to a square at 0° this is due to the increase in the characteristic length in the flow direction. The Strouhal number is highest for elliptic geometry among all cylinders in this research. For the geometries elliptic at 0° at Re = 100, there is not vortex shedding behind the cylinder. This is due to dominance of inertia forces over viscous forces. The present study was carried out for a 2-D single cylinder at fixed location inside a channel for unidirectional velocity. To get more accurate results computation on 3-D geometry should be carried out. |
Sponsorship | Ocean, Offshore and Arctic Engineering Division |
Starting Page | 857 |
Ending Page | 863 |
Page Count | 7 |
File Format | |
ISBN | 9780791849132 |
DOI | 10.1115/OMAE2010-20884 |
e-ISBN | 9780791838730 |
Volume Number | 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5, Parts A and B |
Conference Proceedings | ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering |
Language | English |
Publisher Date | 2010-06-06 |
Publisher Place | Shanghai, China |
Access Restriction | Subscribed |
Subject Keyword | Cycles Vortex shedding Inertia (mechanics) Navier-stokes equations Reynolds number Drag (fluid dynamics) Flow (dynamics) Geometry Fluids Numerical analysis Computation Wakes Cylinders Viscous flow |
Content Type | Text |
Resource Type | Article |
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