Transcritical transition of the fluid around the interface

In this paper, fundamental insights into the dynamic transcritical transition process were provided using molecular dynamics simulations. A transcritical region, which covers three different fluid states, was discovered as a substitute for the traditional interface. The physical properties, such as temperature and density, exhibited a highly nonlinear distribution in the transcritical region. Meanwhile, the surface tension was found to exist throughout the transcritical region, and the magnitude was directly proportional to −ρ∇2ρ.