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Numerical Investigation of Vortex Shedding in a Square Cylinder Using RANS and LES Model

[+] Author Affiliations
Mohammad A. Hossain, Sarzina Hossain

University of Texas at El Paso, El Paso, TX

Mohammad Ikthair Hossain Soiket

McGill University, Montreal, QC, Canada

Paper No. IMECE2014-37393, pp. V007T09A078; 8 pages
doi:10.1115/IMECE2014-37393
From:
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering Systems and Technologies
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4954-5
  • Copyright © 2014 by ASME

abstract

This work deals with the numerical investigation of vortex shedding in a square cylinder. The simulation has been done for 2D turbulent flow. Reynolds number (Re) is considered 22000. In order to resolve the flow field, both Reynolds Average Navier-stokes (RANS) model and Large Eddy Simulation (LES) technique were used. Standard k-epsilon model is considered among different RANS model in order to resolve the mean velocity field and the LES is used to capture the flow separation in the flow field. Both average velocity and velocity fluctuation are determined and compared. Different turbulence properties such as turbulent kinetic energy, turbulent intensity, eddy viscosity and vorticity magnitude are determined and presented for different downstream location to describe the complex flow property in turbulent regime. First the mesh independence test is done by different mesh size. ANSYS Fluent is used for the simulation. A pressured based solver is used with SIMPLE solution scheme, in order to find different flow variables. The results are compared with available published data. There are significant agreements with the experimental data.

Copyright © 2014 by ASME

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