@Article{AAMM-9-1035,
author = {Wei , YikunDou , Hua-ShuZhu , ZuchaoWang , ZhengdaoQian , Yuehong and Xue , Haihong},
title = {Temporal Evolution and Scaling of Mixing in Turbulent Thermal Convection for Inhomogeneous Boundary Conditions},
journal = {Advances in Applied Mathematics and Mechanics},
year = {2018},
volume = {9},
number = {5},
pages = {1035--1051},
abstract = {<p style="text-align: justify;">Numerical simulations of two-dimensional (2D) turbulent thermal convection
for inhomogeneous boundary condition are investigated using the lattice Boltzmann
method (LBM). This study mainly appraises the temporal evolution and the
scaling behavior of global quantities and of small-scale turbulence properties. The
research results show that the flow is dominated by large-scale structures in the turbulence
regime. Mushroom plumes emerge at both ends of each heat source, and smaller
plumes increasingly rise. It is found that the gradient of root mean-square (rms) vertical
velocities and the gradient of the rms temperature in the bottom boundary layer
decrease with time evolution. It is further observed that the temporal evolution of the
Kolmogorov scale, the kinetic-energy dissipation rates and thermal dissipation rates
agree well with the theoretical predictions. It is also observed that there is a range
of linear scaling in the 2nd-order structure functions of the velocity and temperature
fluctuations and mixed velocity-temperature structure function.</p>},
issn = {2075-1354},
doi = {https://doi.org/10.4208/aamm.2016.m1562},
url = {http://global-sci.org/intro/article_detail/aamm/12188.html}
}