重力振動場における二次元正方容器内自然対流に関する数値解析

概要

論文の詳細を見る
To investigate natural convection in a square-section cavity with sinusoidal gravity modulation, we computed it by the finite difference method. The full Navier-Stokes equation in 2D coordinates are simplified with the Boussinesq approximation. The Rayleigh number Ra and the Prandtl number Pr are equal to 1.5×10^4 and 7.1, respectively. While gravity-acceleration amplitude η is fixed at 0.1, non-dimensional angular frequency ω is varied from 10^0 to 10^4. The temperature's amplitude, as well as the velocity's one, can have a maximum value at a certain angular frequency ω_max both locally and globally. More specifically, although ω_max varies depending on the location or on the quantity in concern, ω_max is equal to 100 for the most part. Being compared with our previous study on cylindrical cavity, the results suggest that the present convective mode is rather stable.
一般社団法人日本機械学会の論文
2000-04-25