Heat transfer problem of a dense gas described by the Enskog equation with a modification of the Enskog factor

Abstract

Heat transfer in a dense gas between two parallel plates is studied for assessing the quantitative difference of two variants of the Enskog equation, i.e., the original Enskog equation and the Enskog equation with a modified Enskog factor recently proposed in Phys. Rev. E \textbf{111}, 065108 (2025). The main advantage of the latter is that the H theorem, which the former lacks, has been established. The influence of the modification is assessed by comparing the macroscopic quantities in detail. It is found that the impact of this modification is quite limited and the two variants reasonably agree as a whole.

8 pages,5 figures, 34th International Symposium on Rarefied Gas Dynamics