Relaxation in Random Pores
Physics and Astronomy
To study the dynamics of a binary liquid mixture in glass pores we have performed a molecular dynamics simulation and measured the concentration fluctuation autocorrelation function F-m(q,t) and several other dynamic functions. The relaxation pattern of F-m may be described with an exponentially decaying diffusion term and a logarithmically decaying activation term. Although the system is at a very high temperature in the one-phase region, the results for the velocity autocorrelation functions and the mean-square displacement functions are deceptively similar to those of the bulk when the bulk is in its two-phase region. We discuss what this may mean when the pore size is very large. (C) 1998 American Institute of Physics.
Journal of Chemical Physics
(1998). Relaxation in Random Pores. Journal of Chemical Physics, 109(9), 3304-3307.
Available at: http://aquila.usm.edu/fac_pubs/5069