Numerical Simulation of Turbulent Flow Using Curvilinear Coordinate System

• Main Authors: De-Shau Huang, 黃德劭
• Other Authors: Ruey-Hor Yen
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/37739017233343968069

碩士 === 國立臺灣大學 === 機械工程研究所 === 81 === The complex geometries and turbulent flow are usually encountered in engineering application , for example , kindey- shape combustor , diffuser e.t.c. Numerical methods predicting fluid flow are restricted by the complex geometries , because it is difficult to treat boundary of irregular configurations . Therefore , nonorthogonal coordinate system has been developed rapidly . The velocity components can be classified into the contravariant and covariant velocities . Numerical method based on contravariant or covariant velocity can solve the fluid flow in complex geometries . The present study using covariant velocity components at nonorthogonal curvilinear coordinate system predicts turbulent flow in a complex configuration . The results show that the numerical method predicts well at Cartesian curvilinear coordinate system . But ,the convergence of mass is investigated further at Cylindrical curvilinear coordinate system.