Percolation line and response functions in simple supercritical fluids

Frenkel line and solubility maximum in supercritical fluids.

A new dynamic line, the Frenkel line, has recently been proposed to separate the supercritical state into rigid-liquid and nonrigid gaslike fluid. The location of the Frenkel line on the phase diagram is unknown for real fluids. Here we map the Frenkel line for three important systems: CO(2), H(2)O, and CH(4). This provides an important demarcation on the phase diagram of these systems, the dem...

Continuum percolation and the liquid–solid coexistence line of simple fluids

We compare the percolation loci for chemical clusters with the liquid– solid transition in the temperature–density phase diagram. Chemical clusters are defined as sets of particles connected through particle-particle bonds that last for a given time τ . By using molecular dynamics simulations of a Lennard–Jones system we obtain the percolation loci at different values of τ as the lines in the t...

Scaling limit of simple random walk on supercritical percolation clusters

Electrochemistry in supercritical fluids

A wide range of supercritical fluids (SCFs) have been studied as solvents for electrochemistry with carbon dioxide and hydrofluorocarbons (HFCs) being the most extensively studied. Recent advances have shown that it is possible to get well-resolved voltammetry in SCFs by suitable choice of the conditions and the electrolyte. In this review, we discuss the voltammetry obtained in these systems, ...

Continuum Percolation of Simple Fluids: Energetic Connectivity Criteria

During the last few years, a number of works in computer simulation have focused on the clustering and percolation properties of simple fluids based in an energetic connectivity criterion proposed long ago by T.L. Hill [J. Chem. Phys. 23, 617 (1955)]. This connectivity criterion appears to be the most appropriate in the study of gas-liquid phase transition. So far, integral equation theories ha...