Comment on "Lagrangian formulation and symmetrical description of liquid dynamics".

Bryk, T; Duviryak, A; Mryglod, I · Phys Rev E · 2019

editorial · Level V

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Abstract

Trachenko [Trachenko, Phys. Rev. E 96, 062134 (2017)2470-004510.1103/PhysRevE.96.062134] has argued for creating a Lagrangian formulation of liquid dynamics. This Comment shows that the proposed two-field Lagrangian does not describe dynamics of liquid in a correct way. Other claims on the symmetric description of liquid dynamics and on the similarity of Maxwell and Frenkel characteristic times are discussed.