Turbulence Effect on Square Cylinders in Uniform Flows

• Main Authors: Chi-Yu Chang, 張祁毓
• Other Authors: Fuh-Min Fang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/37135292794044038524

碩士 === 國立中興大學 === 土木工程學系所 === 103 === In the study, a numerical method is established to simulate the unsteady turbulent flow around a two-dimensional square body. At a high Reynolds number, the major parameters of the flow around a cylinder with turbulence intensity and turbulence length scale from laminar to 10% and 0.25D to 1.0D, where D is the width of the square cylinder. To predict the unsteady turbulent flow around the square cylinders, a weakly-compressible-flow method together with a space-average large-eddy-simulation subgrid-scale turbulence model. the turbulent approaching-flow is produced based on the MDSRFG method to properly adjust the prescribed turbulence characteristics. We are verified the validity of the numerical predictions with wind tunnel experiments for build a numerical model.