caa a22 4500 463234863 CHVBK 20180405153253.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10404-006-0098-3 doi (NATIONALLICENCE)springer-10.1007/s10404-006-0098-3 Reciprocating thermocapillary plug motion in an externally heated capillary [Elektronische Daten] [Zhenjun Jiao, Nam-Trung Nguyen, Xiaoyang Huang, Yi Ang] This paper reports the concept and experimental results of reciprocating thermocapillary motion of a liquid plug in microchannels. This paper first describes a one-dimensional analytical model for the transport of microplugs in a capillary. The model considers the coupling effect between heat transfer in the capillary wall and the surface tension driven movement of the plug. Because surface tension depends on temperature, the transient temperature distribution determines the surface tension difference across a plug and thus its movement. In the experiments, we used two heaters, which were activated alternatively. The liquid plug was positioned between the two heaters. The periodic temperature gradients generated by the two heaters made the liquid plug to move back and forth. The position of the plugs was captured and evaluated using a CCD camera. This paper presents the results of this motion with different switching frequencies, viscosities and plug sizes. This actuation concept has potential applications in postprocessing stages for droplet-based microfluidics. Springer-Verlag, 2006 Jiao Zhenjun School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut Nguyen Nam-Trung School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut Huang Xiaoyang School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut Ang Yi School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut Microfluidics and Nanofluidics Springer-Verlag 3/1(2007-02-01), 39-46 1613-4982 3:1<39 2007 3 10404 https://doi.org/10.1007/s10404-006-0098-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10404-006-0098-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jiao Zhenjun School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut NATIONALLICENCE 700 1- Nguyen Nam-Trung School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut NATIONALLICENCE 700 1- Huang Xiaoyang School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut NATIONALLICENCE 700 1- Ang Yi School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore aut NATIONALLICENCE 773 0- Microfluidics and Nanofluidics Springer-Verlag 3/1(2007-02-01), 39-46 1613-4982 3:1<39 2007 3 10404 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer