Two-Dimensonal Decaying Turbulence in Different Shaped Containers

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

Toth, Gabor^1 ; Hazi, Gabor^2

Eotvos University, Faculty of Science, Department of Physics of Complex System, Pazmany Peter setany 1/A, H-1117 Budapest, Hungary^1

Hungarian Academy of Sciences, Centre for Energy Research, Konkoly Th. 29-33, Budapest H-1525, Hungary^2

关键词: Decaying turbulence;    Geometrical constraints;    Initial conditions;    Lattice Boltzmann method;    Numerical approaches;    Physical quantities;    Regular polygon;    Two-dimensional decaying turbulences;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012114/pdf
DOI  :  10.1088/1742-6596/490/1/012114

来源: IOP

【 摘 要 】

Several interesting phenomena have been observed simulating two-dimensional decaying turbulence in bounded domains. In this paper an overview is given about our observations obtained by simulating freely decaying turbulence in different regular polygon shaped containers with no-slip walls. For these simulations the lattice Boltzmann method has been used as a numerical approach. The initial Reynolds number based on the container dimension was in the order of 1000. The initial condition was the same in each simulation, therefore, we were able to compare the effect of geometrical constraints on the evolution of relevant physical quantities such as the kinetic energy and the enstrophy.