Capillary condensation and molecular-dynamics simulations of flow in narrow pores

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Abstract
The Hagen-Poiseuille flow of liquidlike drops formed during capillary condensation of Lennard-Jones molecules through narrow cylindrical pores is studied by molecular-dynamics simulations. The observed time evolution of the system depends upon the strength of the wall-fluid potential and the strength of the gravitational-type driving force. In the case of weak adsorbing walls, the whole drop slips along the pore, and during the flow changes in its local structure are observed. For stronger fluid-wall interaction and for larger driving forces, the phenomenon of vanishing of the drop has been found.

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