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

作     者：Maziar Gholami Korzani Sergio A. Galindo-Torres Alexander Scheuermann David J. Williams Maziar Gholami Korzani;Sergio A. Galindo-Torres;Alexander Scheuermann;David J. Williams

作者机构：School of Civil Engineering The University of Queensland St Lucia Brisbane QLD 4072 Australia School of Mathematics and Physics The University of Queensland St Lucia Brisbane QLD 4072 Australia 

出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)

年 卷 期：2017年第10卷第2期

页      面：143-153页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the Australian Research Council Discovery Project(Grant No.DP120102188) 

主　　题：Smoothed particle hydrodynamics Drag coefficient Reynolds number Sensitivity analysis Viscous flow 

摘      要：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(1-500) 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.