Water Science and Engineering 2017, 10(2) 143-153 DOI:   http://dx.doi.org/10.1016/j.wse.2017.06.001  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
Smoothed particle hydrodynamics
Drag coefficient
Reynolds number
Sensitivity analysis
Viscous flow
Authors
Maziar Gholami Korzani
Sergio A. Galindo-Torres
Alexander Scheuermann
David J. Williams
PubMed
Article by Maziar Gholami Korzani
Article by Sergio A. Galindo-Torres
Article by Alexander Scheuermann
Article by David J. Williams

Parametric study on smoothed particle hydrodynamics for accurate determination of drag coefficient for a circular cylinder

Maziar Gholami Korzani a,*, Sergio A. Galindo-Torres a,b, Alexander Scheuermann a, David J. Williams a

a School of Civil Engineering, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia
b School of Mathematics and Physics, The University of Queensland, St Lucia, Brisbane, QLD 4072, Australia

Abstract

Simulations of two-dimensional (2D) flow past a circular cylinder with the smoothed particle hydrodynamics (SPH) method were conducted in order to accurately determine the drag coefficient. The fluid was modeled as a viscous liquid with weak compressibility. Boundary conditions, such as a no-slip solid wall, inflow and outflow, and periodic boundaries, were employed to resemble the physical problem. A sensitivity analysis, which has been rarely addressed in previous studies, was conducted on several SPH parameters. Hence, the effects of distinct parameters, such as the kernel choices and the domain dimensions, were investigated with the goal of obtaining highly accurate results. A range of Reynolds numbers (1 to 500) was simulated, and the results were compared with existing experimental data. It was observed that the domain dimensions and the resolution of SPH particles, in comparison to the obstacle size, affected the obtained drag coefficient significantly. Other parameters, such as the background pressure, influenced the transient condition, but did not influence the steady state at which the drag coefficient was determined.

Keywords Smoothed particle hydrodynamics   Drag coefficient   Reynolds number   Sensitivity analysis   Viscous flow  
Received 2016-11-16 Revised 2017-03-21 Online: 2017-04-30 
DOI: http://dx.doi.org/10.1016/j.wse.2017.06.001
Fund:

This work was supported by the Australian Research Council Discovery Project (Grant No. DP120102188).

Corresponding Authors: Maziar Gholami Korzani
Email: m.gholamikorzani@uq.edu.au
About author:

References:

This work was supported by the Australian Research Council Discovery Project (Grant No. DP120102188).

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