Daniels KE, Plapp BB, Bodenschatz E
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501, USA.
Phys Rev Lett. 2000 Jun 5;84(23):5320-3. doi: 10.1103/PhysRevLett.84.5320.
We report experiments on thermally driven convection in an inclined layer of large aspect ratio in a fluid of Prandtl number sigma approximately 1. We observed a number of new nonlinear, mostly spatiotemporally chaotic, states. At small angles of inclination we found longitudinal rolls, subharmonic oscillations, Busse oscillations, undulation chaos, and crawling rolls. At larger angles, in the vicinity of the transition from buoyancy- to shear-driven instability, we observed drifting transverse rolls, localized bursts, and drifting bimodals. For angles past vertical, when heated from above, we found drifting transverse rolls and switching diamond panes.
我们报告了在普朗特数σ约为1的流体中，大纵横比倾斜层内热驱动对流的实验。我们观察到了许多新的非线性状态，大多是时空混沌状态。在小倾斜角度下，我们发现了纵向滚动、次谐波振荡、布斯振荡、波动混沌和蠕动滚动。在较大角度下，在从浮力驱动到剪切驱动不稳定性转变的附近，我们观察到了漂移的横向滚动、局部爆发和漂移双峰。对于超过垂直角度且从上方加热的情况，我们发现了漂移的横向滚动和切换菱形窗格。
