Abstract
From the beginning of the last century several theoretical and experimental studies have been devoted to the analysis of the dynamics of liquid flow into a capillary, and different regimes have been identified. In particular, in the asymptotic long-time limit, the celebrated Washburn regime is recovered: the liquid front moves proportionally to the square root of the time.
Results of extensive two-phase Lattice Boltzmann simulations of capillary filling of two-dimensional microchannels are reported here.
The domain of validity of the Washburn regime is inspected and critically
compared with experimental data.
A good match between the simulation results and the predicted theoretical behaviour is obtained in the long-time limit.
Finally, the influence of various physical parameters and different geometrical constraints has been evaluated.
Users
Please
log in to take part in the discussion (add own reviews or comments).