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  • Open Access

Practical Kinetic Models for Dense Fluids

Ilya Karlin* and Seyed Ali Hosseini†

  • Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland

  • *Contact author: ikarlin@ethz.ch
  • †Contact author: shosseini@ethz.ch
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Phys. Rev. Lett. 136, 104002 – Published 9 March, 2026

DOI: https://doi.org/10.1103/fd39-6hmq

Abstract

A novel approach to constructing kinetic models is proposed on the basis of the separation of local and nonlocal contributions to particle interaction. The method results in a generic kinetic equation for complex fluid systems, amenable to efficient numerical realization. The main obstruction to causality caused by a coupling between the nonuniform temperature field and the nonideal equation of state is resolved based on gauge invariance of the hydrodynamic limit. A new lattice Boltzmann model is derived for compressible nonideal fluid simulation based on the Enskog-Vlasov kinetic theory as a case of practical importance.

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Phys. Rev. Lett. 136, 104002– Published 9 March, 2026
  • Received 5 August 2025
  • Accepted 10 February 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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