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Thermoosomosis in microfluidic devices containing a temperature gradient normal to the channel walls

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Abstract.

We analyze a microfluidic pump from the literature that utilizes a flat channel with boundary walls at different temperatures and tilted elongated pillars within in order to construct an adequate theory for designing devices in which the temperature gradient between channel walls is transformed into a longitudinal temperature gradient along the channel length. The action of the device is based on thermoosmosis in the secondary longitudinal temperature gradient associated with the specific geometry of the device, which can be described using physicochemical hydrodynamics without invoking the concept of thermophoretic force. We also describe a rotating drive device based on the same principle and design.

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Authors and Affiliations

  1. Institute of Biochemical Physics, RAS, Moscow, Russia

    Semen N. Semenov

  2. Boise State University, Boise, ID, USA

    Martin E. Schimpf

Authors
  1. Semen N. Semenov
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  2. Martin E. Schimpf
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Correspondence to Semen N. Semenov.

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Semenov, S.N., Schimpf, M.E. Thermoosomosis in microfluidic devices containing a temperature gradient normal to the channel walls. Eur. Phys. J. E 42, 141 (2019). https://doi.org/10.1140/epje/i2019-11914-8

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  • DOI: https://doi.org/10.1140/epje/i2019-11914-8

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