DIRECT NUMERICAL SIMULATIONS OF TURBULENCE INDUCED SECONDARY MOTION IN SQUARE AND SKEWED DUCTS

7th International Symposium on Turbulence and Shear Flow Phenomena

Hassan Raiesi ; Andrew Pollard ; Ugo Piomelli

PID  :  125761

来源: CEUR

【 摘 要 】

We performed direct numerical simulations of tur bulent flow in square and skewed ducts. A second orderaccurate finitevolume approach was used to dis cretize the NavierStokes equations in a curvilinear co ordinate system. The mean secondary flow field was observed in all cases; in the skewed ducts, however, the strength of the secondary flow is weaker compared to that for the square duct. The flow in the sharper corners tend to relaminarize and the axis of the secondary flow