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Isomorphic property of sheared three-dimensional Yukawa liquidlike fluids

Dong Huang and Yan Feng*

  • Institute of Plasma Physics and Technology, Jiangsu Key Laboratory of Frontier Material Physics and Devices, School of Physical Science and Technology, Soochow University, Suzhou 215006, China

  • *Contact author: fengyan@suda.edu.cn
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Phys. Rev. Research 8, 033299 – Published 11 September, 2026

DOI: https://doi.org/10.1103/md4x-9k3g

Abstract

The isomorphic property of strongly coupled three-dimensional (3D) Yukawa liquidlike fluids under steady shear is systematically investigated using nonequilibrium molecular dynamical simulations. It is discovered that, as the shear rate increases substantially, the shear viscosity η and the radial distribution function g(r) both exhibit excellent isomorphic scaling properties. The isomorphic scaling of shear viscosity is attributed to the dominant role of neighboring particles, whose averaged local configuration of g(r) is invariant, even though 3D Yukawa fluids are continuously deformed and rearranged by the applied shear. Furthermore, it is found that the Stokes-Einstein relation is violated at higher shear rates because the diffusion coefficient D is directional dependent and sensitive to the applied shear, i.e., not an isomorph invariant anymore.

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Phys. Rev. Research 8, 033299– Published 11 September, 2026
  • Received 29 July 2026
  • Accepted 27 August 2026
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