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Transition to Chaos of Buoyant-Thermocapillary Convection in Large-Scale Liquid Bridges
Microgravity Science and Technology ( IF 1.3 ) Pub Date : 2020-01-08 , DOI: 10.1007/s12217-019-09770-2 Jia Wang , Di Wu , Li Duan , Qi Kang
Microgravity Science and Technology ( IF 1.3 ) Pub Date : 2020-01-08 , DOI: 10.1007/s12217-019-09770-2 Jia Wang , Di Wu , Li Duan , Qi Kang
To cooperate with the Chinese TG-2 space experiment project, the transition routes to chaos of buoyant-thermocapillary convection were experimentally researched in large-scale liquid bridge of 2cSt silicone oil with 20 mm in diameter. A Nanovoltmeter with high resolution was adopted to measure the dynamical temperature oscillations, as well as to detect the convective transitional behaviors which were nonlinear and non-stationary. The existence of the quasi-periodic route and the Feigenbaum route has been confirmed in large-scale LBs, and a novel periodic oscillation state was discussed in detail for the first time. The chaotic characteristics were verified by analyzing the maximum Lyapunov exponent and correlation dimension on the basis of a phase-space reconstruction. Additionally, it was found that bifurcation could potentially lead to the reconstruction of flow fields.
更新日期：2020-01-08
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