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http://hdl.handle.net/1942/32742
Title: | Thermocapillary motion of a solid cylinder near a liquid-gas interface | Authors: | Arslanova, Alina Natale, Giovanniantonio REDDY, Naveen Clasen, Christian Fransaer, Jan |
Issue Date: | 2020 | Publisher: | American Institute of Physics | Source: | PHYSICS OF FLUIDS, 32 (12) (Art N° 127109) | Abstract: | The motion of a solid, infinitely long cylinder perpendicular to a convective liquid-gas interface due to thermocapillarity is investigated via an analytical model. If the cylinder temperature differs from the bulk temperature, a temperature gradient exist along the liquid-gas interface. This results in surface tension gradients at the liquid-gas interface, causing fluid flow around the particle which induces propulsion. For small particles, and thus small Péclet and Reynolds numbers the steady-state equations for temperature and flow fields are solved exactly using two-dimensional bipolar cylindrical coordinates. The velocity of the cylinder as a function of separation distance from the liquid-gas interface is determined for the case of a constant temperature or a constant heat flux on the surface of the cylinder. A larger temperature gradient at the liquid-gas interface in the latter system leads to a larger cylinder velocity and a higher propulsion efficiency. The thermocapillary effect result in larger force on a cylinder than forces arising from other self-propulsion mechanisms. | Document URI: | http://hdl.handle.net/1942/32742 | ISSN: | 1070-6631 | e-ISSN: | 1089-7666 | DOI: | 10.1063/5.0027309 | ISI #: | WOS:000600103300002 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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5.pdf Restricted Access | Published version | 2.72 MB | Adobe PDF | View/Open Request a copy |
Article_thermocapillary_after_revision2.pdf | Peer-reviewed author version | 656.99 kB | Adobe PDF | View/Open |
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