We study the distribution of the microscopic energy flux j which is carried by a single particle. It is observed in Lennard-Jones particle system that the distribution of the norm the energy flux Pn(j) has a broad peak in small j regime and a stretched-exponential decay for large j. The broad peak originates in the potential advection and energy transfer between particles. The stretched exponential tail is from the momentum energy advection.In nonlinear-lattice systems, all the flux components jK, jU, and jF show stretched exponential decay.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)