%0 Book Section %1 statphys23_1014 %A Biferale, L. %A Chibbaro, S. %A Diotallevi, F. %A Pisignano, D. %A Pontrelli, G. %A Succi, S. %A Toschi, F. %B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics %C Genova, Italy %D 2007 %E Pietronero, Luciano %E Loreto, Vittorio %E Zapperi, Stefano %K boltzmann lattice microfluidics statphys23 topic-6 wetting %T Lattice Boltzmann simulations of capillary filling in microchannels %U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=1014 %X 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.

@incollection{statphys23_1014, 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.}, added-at = {2007-06-20T10:16:09.000+0200}, address = {Genova, Italy}, author = {Biferale, L. and Chibbaro, S. and Diotallevi, F. and Pisignano, D. and Pontrelli, G. and Succi, S. and Toschi, F.}, biburl = {https://www.bibsonomy.org/bibtex/2d0d14aef2f5b3ca615c7fb912c036c5d/statphys23}, booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics}, editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano}, interhash = {39d2c9a05b5bbe1fee17483d4b7cd23c}, intrahash = {d0d14aef2f5b3ca615c7fb912c036c5d}, keywords = {boltzmann lattice microfluidics statphys23 topic-6 wetting}, month = {9-13 July}, timestamp = {2007-06-20T10:16:36.000+0200}, title = {Lattice Boltzmann simulations of capillary filling in microchannels}, url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=1014}, year = 2007 }