中国物理B ›› 2008, Vol. 17 ›› Issue (3): 1034-1040.doi: 10.1088/1674-1056/17/3/048
李步阳1, 邹立勇2, 柏劲松2, 谭多望2, 李平2, 刘仓理2
Zou Li-Yong(邹立勇)a)† , Bai Jing-Song(柏劲松)a), Li Bu-Yang(李步阳)b),Tan Duo-Wang(谭多望)a), Li Ping(李平)a), and Liu Cang-Li(刘仓理)a)
摘要: This paper solves the three-dimensional Navier--Stokes equation by a fractional-step method with the Reynolds number Re$_\tau $=194 and the rotation number $N_\tau $=0--0.12. When $N_\tau $ is less than 0.06, the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced, but other statistics are suppressed. When $N_\tau $ is larger than 0.06, all the turbulence statistics decrease significantly. Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions. The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface. Evident change of near-surface streak structures of the velocity fluctuations are revealed.
中图分类号: (Channel flow)