[en] The results of the numerical investigation of mass-transfer processes of extensive quasi-two-dimensional and three-dimensional nonideal dissipative systems are presented. Simulations were performed for different types of model pair potentials for inter-grain interaction that had various combinations of power-law and exponential functions. The parameters of calculations corresponded to the conditions of laboratory dusty plasma experiments. It was shown that the dynamics of grains in nonideal liquid-like systems on short observation times is close to the evolution of thermal oscillations in the crystal lattice