CAJ | 학술논문

针对明渠湍流流动,研究了计算网格、计算域大小、亚格子(SGS)模型和雷诺数等因素对大涡模拟(LES)预报精度的影响.研究表明,即使简单外形的湍流流动,网格尺寸大小及匹配仍较大地影响大涡模拟计算结果,因此具体使用中应予以充分重视.
침대명거단류류동,연구료계산망격、계산역대소、아격자(SGS)모형화뢰낙수등인소대대와모의(LES)예보정도적영향.연구표명,즉사간단외형적단류류동,망격척촌대소급필배잉교대지영향대와모의계산결과,인차구체사용중응여이충분중시.
For the turbulent flows of the open-channels, the effects offactors of calculational mesh, the sizes of computational domain, SGS models and Reynolds numbers on the prediction precision of large eddy simulation(LES) are discussed. The results indicate that the prediction precision of LES is deeply affected by the sizes and the matching of mesh, even for those simple turbulent flows. In practice , the above factors should be considered.