Hydrodynamic interactions in two dimensions Export

@article{dileonardo08, abstract = {We measure hydrodynamic interactions between colloidal particles confined in a thin sheet of fluid. The reduced dimensionality, compared to a bulk fluid, increases dramatically the range of couplings. Using optical tweezers we force a two body system along the eigenmodes of the mobility tensor and find that eigenmobilities change logarithmically with particle separation. At a hundred radii distance, the mobilities for rigid and relative motions differ by a factor of 2, whereas in bulk fluids, they would be practically indistinguishable. A two dimensional counterpart of Oseen hydrodynamic tensor quantitatively reproduces the observed behavior, once the relevant boundary conditions are recognized. These results highlight the importance of dimensionality for transport and interactions in colloidal systems and proteins in biological membranes.}, author = {Di Leonardo, R. and Keen, S. and Ianni, F. and Leach, J. and Padgett, M. J. and Ruocco, G.}, citeulike-article-id = {5757111}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000078000003031406000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRE/v78/e031406}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevE.78.031406}, doi = {10.1103/PhysRevE.78.031406}, journal = {Physical Review E}, keywords = {laser-tweezer, microrheology, soap-film}, number = {3}, pages = {031406}, posted-at = {2009-09-09 02:43:31}, priority = {0}, publisher = {APS}, title = {Hydrodynamic interactions in two dimensions}, url = {http://dx.doi.org/10.1103/PhysRevE.78.031406}, volume = {78}, year = {2008} }

TY - JOUR ID - dileonardo08 L3 - citeulike-article-id:5757111 N2 - We measure hydrodynamic interactions between colloidal particles confined in a thin sheet of fluid. The reduced dimensionality, compared to a bulk fluid, increases dramatically the range of couplings. Using optical tweezers we force a two body system along the eigenmodes of the mobility tensor and find that eigenmobilities change logarithmically with particle separation. At a hundred radii distance, the mobilities for rigid and relative motions differ by a factor of 2, whereas in bulk fluids, they would be practically indistinguishable. A two dimensional counterpart of Oseen hydrodynamic tensor quantitatively reproduces the observed behavior, once the relevant boundary conditions are recognized. These results highlight the importance of dimensionality for transport and interactions in colloidal systems and proteins in biological membranes. IS - 3 JF - Physical Review E EP - 031406 TI - Hydrodynamic interactions in two dimensions PB - APS VL - 78 SP - 031406 KW - laser-tweezer KW - microrheology KW - soap-film AU - Di Leonardo, R AU - Keen, S AU - Ianni, F AU - Leach, J AU - Padgett, MJ AU - Ruocco, G PY - 2008/// UR - http://dx.doi.org/10.1103/PhysRevE.78.031406 ER -