LFPB Seminar: Experimental investigation of the connection between thermophoresis and thermo-osmosis

LFPB Seminar

  • Datum: 15.07.2024
  • Uhrzeit: 15:00 - 16:00
  • Vortragende(r): Prof. Tetsuro Tsuji
  • Graduate School of Informatics, Kyoto University, Japan
  • Ort: Max-Planck-Institut für Dynamik und Selbstorganisation (MPIDS)
  • Raum: Prandtl Lecture Hall and Zoom ID 691 0007 9220, Passcode 856480
  • Gastgeber: MPI-DS
  • Kontakt: vahid.nasirimarekani@ds.mpg.de
When a solid surface is exposed to the temperature gradient of fluids in contact, a cree-ping flow is induced along the surface. This thermal flow, often referred to as thermo-osmosis, plays an important role in micro- and nanoscale thermo-fluid mechanics. For in-stance, suspended particles in locally heated fluids are expected to move in the opposite direction of thermo-osmosis which is driven near the surfaces of particles. Such migrati-on of particles is known as thermophoresis and was investigated experimentally in Ref [1] by characterizing the thermo-osmosis along the surface of thermophoretic micropartic-les. In particular, flow evaluation using the optical trapping of tracers revealed the connection between thermophoresis and thermo-osmosis [1].

[1] T. Tsuji, et al., “Thermo-osmotic slip flows around a thermophoretic microparticle characterized by op-tical trapping of tracers”, Physical Review Applied 20 (5), 054061 (2023)
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