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UNSTEADY MODEL OF DROP MARANGONI MIGRATION IN MICROGRAVITY

Acta Mechanica Sinica 2002年第3期18卷 227-234页

作者：耿荣慧胡文瑞金友兰敖超 Institute of Mechanics Chinese Academy of Sciences Beijing China 100080 Institute of Computational Mathematics Chinese Academy of Sciences Beijing China 100080

The experiments of drop Marangoni migration have been performed by the drop shift facility of short period of 4.5 s, and the drop accelerates gradually to an asymptotic velocity during the free fall. The unsteady and axisymmetric model is developed to study the drop migration for the case of moderate Reynolds numberRe=O(1), and the results are compared with the experimental ones in the present paper. Both numerical and experimental results show that the migration velocity for moderate Reynolds number is several times smaller than that given by the linear YGB theory.

关键词： drop migration thermocapillary effect microgravity fluid mechanics

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Thin liquid film as an optical nonlinear-nonlocal medium and memory element in integrated optofluidic reservoir computer

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Advanced Photonics 2022年第4期4卷 56-67页

作者： Chengkuan Gao Prabhav Gaur Shimon Rubin Yeshaiahu Fainman University of California San DiegoDepartment of Electrical and Computer EngineeringLa JollaCaliforniaUnited States

Understanding light–matter interaction lies at the core of our ability to harness physical effects and to translate them into new capabilities realized in modern integrated photonics ***,we present the design and characterization of optofluidic components in an integrated photonics platform and computationally predict a series of physical effects that rely on thermocapillary-driven interaction between waveguide modes and topography changes of optically thin liquid dielectric *** results indicate that this coupling introduces substantial self-induced phase change and transmittance change in a single channel waveguide,transmittance through the Bragg grating waveguide,and nonlocal interaction between adjacent *** then employ the self-induced effects together with the inherent built-in finite relaxation time of the liquid film,to demonstrate that the light-driven deformation can serve as a reservoir computer capable of performing digital and analog tasks,where the gas–liquid interface operates both as a nonlinear actuator and as an optical memory element.

关键词： light-liquid interaction optofluidics nanophotonics silicon photonics reservoir computing thermocapillary effect

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VELOCITY FIELD OF thermocapillary CONVECTION IN HIGH-TEMPERATURE OXIDE SOLUTION

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空间科学学报 2002年第Z1期22卷 165-165页

作者： JIN Weiqing Shinichi YODA Jiang Yuanfang LIANG Xinan PAN Zhilei SHEN Guotu LIU Zhaohua Shanghai Institute of Ceramics The Chinese Academy of SciencesShanghai 200050P.R.China Space Utilization Research Center Office of Space Utilization SystemIbaraki 305Japan Department of Physics East China Normal UniversityShanghai 200062P.R.China

We have investigated experimentally and theoretically the thermocapillary convec tive flow phenomena in a loop-shaped Pt wire heater of KNbO_(3)(20wt.%)and Li_(2)B_(4)O_(7) *** evaluations in connection with thermocouple measure ments made it possible to get a new type of thermocapillary convective flow in the considered *** study the kinematical behaviour of thermocapillary convec tion,we have measured the stream flow *** a theoretical analysis,the flow velocity due to the thermocapillary effect alone was estimated by balancing the sur face tension forces by viscous *** velocity distribution in the solution near the margin of the heater was obtained,which is in agreement with the experimental result.……

关键词： thermocapillary effect velocity distribution flow phenomena flow velocity stream flow type of

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