Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 22, 2016 - October 23, 2016
We performed direct numerical simulations of a spectral method of a plane Poiseuille flow under stable stratification. The friction Reynolds number is Reτ = uτδ/ν = 1000 and Prandtl number is Pr = ν/α = 0.71 , where uτ , δ , ν , and α are friction velocity, the channel half width, the kinetic viscosity and thermal diffusivity, respectively. The Grashof number was systematically increased. From the calculation results, we could observe the attenuation of turbulent. In the channel center, the mean velocity was increased because of the attenuation of large scale turbulent by stable stratification.
