2005/08/30 by Jeetain Mittal, Jeffrey R. Errington, Thomas M. Truskett +1
Agricultural and Biological Sciences · Materials Science · Physics and Astronomy · #Agricultural and Food Sciences #Material Dynamics and Properties #NMR spectroscopy and applications #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.stat-mech
paper · pdf · doi:10.1103/physreve.74.040102
published as Phys. Rev. E 74, 040102 (2006). · to appear in Physical Review E (12 pages, 4 figures)
openalex publication_date 2005/08/30 · arxiv created 2006/10/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/02
We propose a simple equation for predicting self-diffusivity of fluids embedded in random matrices of identical, but dynamically frozen, particles (i.e., quenched-annealed systems). The only nontrivial input is the volume available to mobile particles, which also can be predicted for two common matrix types that reflect equilibrium and nonequilibrium fluid structures. The proposed equation can account for the large differences in mobility exhibited by quenched-annealed systems with indistinguishable static pair correlations, illustrating the key role that available volume plays in transport.