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Odd viscosity (OV) contributes to dissipation in 3D fluids, unlike in 2D. Researchers quantified this effect using a single spherical particle, offering new ways to measure OV and design complex fluid rheology.

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Rheology

Background:

  • Odd viscosity (OV) is a transport coefficient found in active matter and electron systems.
  • OV does not cause dissipation in two-dimensional systems.
  • Its role in three-dimensional dissipation remains less understood.

Purpose of the Study:

  • To investigate the indirect contribution of odd viscosity to dissipation in three-dimensional fluids.
  • To quantify the dissipation rate of a spherical particle in a fluid with odd viscosity.
  • To propose a method for measuring odd viscosity effects and designing complex fluid rheology.

Main Methods:

  • Exact analytical solution of generalized stationary creeping flow equations.
  • Analysis of the solid-body motion of a single spherical particle.
  • Theoretical modeling of fluid flow modification by odd viscosity.

Main Results:

  • Odd viscosity indirectly contributes to dissipation in three-dimensional fluids by altering fluid flow.
  • The dissipation rate of a spherical particle was precisely quantified.
  • A direct correlation between particle motion and odd viscosity effects was established.

Conclusions:

  • Measuring the solid-body motion of a single particle offers a novel method to quantify odd viscosity.
  • Complex fluid rheology can be engineered by combining passive and active particles.
  • This work clarifies the role of odd viscosity in three-dimensional dissipative processes.