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    In a recent article, Nicasio-Collazoet al(2023J. Phys.: Condens. Matter35425401) explore the viscosity of the pseudo-hard-sphere (PHS) model. In this comment, we highlight some discrepancies with expected behavior, and compare their results to new simulations of the same model as well as to true hard spheres. In contrast to the results of Nicasio-Collazoet al, our results follow the relation between shear, bulk, and longitudinal viscosity expected for isotropic fluids. Moreover, we observe clear differences in behavior between PHS and true hard sphere, and encourage future hard-sphere studies to focus on the true hard sphere model whenever possible. Creative Commons Attribution license.

    Citation

    Frank Smallenburg. Comment on 'Pseudo hard-sphere viscosities from equilibrium molecular dynamics'. Journal of physics. Condensed matter : an Institute of Physics journal. 2024 Mar 04;36(22)


    PMID: 38436284

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