界面张力梯度驱动对流向湍流转捩的研究

郭子漪, 李凯, 康琦, 段俐, 胡文瑞

Study on bifurcation to chaos of surface tension gradient driven flow

GUO Ziyi, LI Kai, KANG Qi, DUAN Li, HU Wenrui

图 14 不同温差下长高比为14.25的矩形液池中自由面上流体沿自由面速度扰动的时间演化、功率谱和相空间重构: (a) $\Delta T=18.80$ K $(Re={Re}_{\rm c} =49 )$, (b) $\Delta T=22.00$ K $(Re=58$, $\varepsilon =0.17)$, (c) $\Delta T =$ 24.50 K $(Re=64$, $\varepsilon =0.30)$, (d) $\Delta T =28.65$ K $(Re=75$, $\varepsilon =0.52)$, (e) $\Delta T =33.00$ K $(Re=86$, $\varepsilon =0.76)$, (f) $\Delta T =60.00 $ K $(Re=157$, $\varepsilon =2.19)$. 随着温差增加, 流动依次经历了周期振荡(a, b)、准周期振荡(c)、周期振荡(d)、准周期振荡(e)、混沌(f) (Li et al. 2016)