https://doi.org/10.1140/epjs/s11734-025-01887-3
Regular Article
Interfacial slip modulated droplet dynamics in a non-isothermal Poiseuille flow
1
Mechanical Engineering, Birla Institute of Technology and Science Pilani, Hyderabad Campus, 500078, Hyderabad, Telangana, India
2
Mechanical Engineering, NIT Silchar, 788010, Silchar, Assam, India
a
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Received:
27
June
2025
Accepted:
23
August
2025
Published online:
1
September
2025
Abstract
The dynamics as well as the motion of a droplet suspended in a self-rewetting fluid undergoing a pressure driven flow, in the presence of interfacial slip and an externally imposed temperature gradient, is studied analytically. A small deformation asymptotic approach is adopted to solve for the flow and the temperature fields. The analysis shows that the droplet migration velocity is a strong function of the interfacial slip as well as the applied temperature gradient, especially for droplets of viscosity lower as compared to that of the suspending medium. Depending on the magnitude of the interfacial slip, the droplet is observed to migrate against the flow for a constant temperature gradient applied opposite to the imposed flow. The droplet deformation, which is usually independent of the thermal Marangoni stress for normal fluids, is found to be a strong function of the latter due to the non-linear dependence of surface tension on the interfacial temperature for self-rewetting fluids.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
