Flow field disturbance due to point viscosity variations in a heterogeneous fluid

Das, Debasish (2023) Flow field disturbance due to point viscosity variations in a heterogeneous fluid. Physical Review Fluids, 8 (5). L051301. ISSN 2469-990X (https://doi.org/10.1103/PhysRevFluids.8.L051301)

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Abstract

We derive the flow field disturbance produced by point viscosity variations in a heterogeneous fluid when subject to a background flow while neglecting fluid inertia. The disturbance flow field is found to be identical to that generated by a force dipole called a stresslet. Using a combination of theory and numerical simulations, we show how the hydrodynamics of an active rigid particle is altered due to the presence of point viscosity variations, and how this can be exploited to manipulate and steer them in microfluidic environments.

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• Item metadata

  Item type:	Article
  ID code:	87179
  Dates:	Date Event 8 May 2023 Published 12 April 2023 Accepted 24 March 2022 Submitted
  Subjects:	Science > Physics Science > Mathematics
  Department:	Faculty of Science > Mathematics and Statistics
  Depositing user:	Pure Administrator
  Date deposited:	06 Nov 2023 14:34
  Last modified:	09 Apr 2024 04:19
  URI:	https://strathprints.strath.ac.uk/id/eprint/87179