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초록· 키워드
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To analyze two dimensional incompressible laminar natural convection in a rectangular enclosure heated from below and cooled by a horizontal ceiling and two vertical walls, the primitive Navier-Stokes equations and the energy equation were solved numerically in time dependent form by a marker and cell method. A successive over-relaxation method for the elliptic portion of the problem and an explicit method for the parabolic portion were applied for the range of Grashoff number of 5×10³ to 5×10⁴ to get the transient and steady state dimensionless temperature and velocity profiles.
For the range of aspect ratio L/H≦2.4 in which only a pair of convection rolls exists mean Nusselt number calculated are as follows :
N_(NU)＝0.89 N^(0.2)_(Gr) (H/L)^(0.45)
By path lines drawn by marker particle trajectories roll number of cellular motion were observed for various aspect ratio of the enclosure.
For the range of aspect ratio L/H≦2.4 in which only a pair of convection rolls exists mean Nusselt number calculated are as follows :
N_(NU)＝0.89 N^(0.2)_(Gr) (H/L)^(0.45)
By path lines drawn by marker particle trajectories roll number of cellular motion were observed for various aspect ratio of the enclosure.
목차
Abstracts
1. 諸論
2. 基本方程式
3. 數値解析
4. 結果
5. 結論
參考文獻
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