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  • Pressure-driven filling of liquid metal in closed-end microchannels

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    Accepted Manuscript (AM)
    Author(s)
    Ganan-Calvo, Alfonso M
    Guo, Wei
    Xi, Heng-Dong
    Teo, Adrian JT
    Nam-Trung, Nguyen
    Tan, Say Hwa
    Griffith University Author(s)
    Guo, Wei
    Nguyen, Nam-Trung
    Tan, Say Hwa H.
    Teo, Adrian J.
    Year published
    2018
    Metadata
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    Abstract
    We observe unsteady flow behavior of liquid metal during a pressure-driven injection process into a closed-ended polydimethylsiloxane microchannel. Constant pressure is applied at the inlet to allow eutectic gallium-indium (EGaIn) to completely fill the porous microchannels. In contrast to open channels [M. D. Dickey et al., Adv. Funct. Mater. 18, 1097 (2008)], the flow exhibits a complex unsteady behavior with sudden random length jumps and time stops. However, with appropriate formulation of a suitable mathematical model with the system using (i) the permeability of polydimethylsiloxane to air, (ii) previous descriptions ...
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    We observe unsteady flow behavior of liquid metal during a pressure-driven injection process into a closed-ended polydimethylsiloxane microchannel. Constant pressure is applied at the inlet to allow eutectic gallium-indium (EGaIn) to completely fill the porous microchannels. In contrast to open channels [M. D. Dickey et al., Adv. Funct. Mater. 18, 1097 (2008)], the flow exhibits a complex unsteady behavior with sudden random length jumps and time stops. However, with appropriate formulation of a suitable mathematical model with the system using (i) the permeability of polydimethylsiloxane to air, (ii) previous descriptions of the nature of the EGaIn surface oxide layer, and (iii) a key probabilistic approach, we show that the average quantities defining the quantumlike flow can be accurately predicted. The proposed probabilistic formulation provides for the first time a description of the dynamics of the surface oxide layer, the breaking and healing characteristic times when EGaIn is driven in a microchannel. Importantly, this work provides a better understanding of complex flow behavior and lays the foundation for future work.
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    Journal Title
    Physical Review E
    Volume
    98
    DOI
    https://doi.org/10.1103/PhysRevE.98.032602
    Copyright Statement
    © 2018 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Fluid mechanics and thermal engineering
    Publication URI
    http://hdl.handle.net/10072/384872
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    • Journal articles

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