科研之友
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摘要
This article reports a numerical study on the roads to chaos for a transient laminar natural convection in a square enclosure with horizontal adiabatic walls. The other walls, composed of two regions of the same size, were assumed isothermal. Transfer equations were solved using the vorticity-stream function formulation. The effects of Rayleigh number on heat transfer were also analyzed, and the roads to chaos borrowed by the convective flow. As the Rayleigh number increased, the flow structure started from four-cells to oscillatory three-cells. The first Hopf bifurcation was observed. Quasi-periodic flows appeared before the chaos onset.
- 出版日期2014-2-1
