National Aerospace Laboratory
University of Electro-Communications
University of Electro-Communications
出版者
航空宇宙技術研究所
出版者（英）
National Aerospace Laboratory(NAL)
雑誌名
航空宇宙技術研究所特別資料
雑誌名(英)
Special Publication of National Aerospace Laboratory SP-14
巻
14
ページ
209 - 214
発行年
1990-11
抄録（英）
Numerical simulation of thermal convection in a horizontal rectangular duct flow heated from both bottom and sides is carried out using a method based on the Fourier spectral method. It is shown that the convective secondary flow is induced not only by the Rayleigh-Benard instability but by the natural convection near the duct's side walls. As a result, we have almost stationary longitudinai convective rolls in the flow when the Reynolds numbers are rather larger values, 500 and 220. On the other hand, when the Reynolds numbcr is a smaller value, 90, the rolls fluctuate chaotically in space and time; then the time-averaged secondary flow is almost vanishing and the fluid temperature widely constant in the central part of duct.
対流を伴う矩形ダクト流の数値シミュレーション
nalsp0014033.pdf
(464.13KB)
