%0 Book Section %1 statphys23_0297 %A Park, Y. %A Daniels, L. %A Lubensky, T.C. %A Durian, D.J. %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 brownian coupling ellipsoid equation gas-fluidized langevin motion particles rotational statphys23 to topic-3 translational %T Brownian motion of gas-fluidized ellipsoid particles. %U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=297 %X We studied the Brownian motion of ellipsoidal particles placed on a fine sieve in an upward flow of gas and investigated the effect of dissipative coupling of translational to rotational motion. By using digital video microscopy, we quantified the positions and orientations of individual particles. We found that angular correlations decay approximately exponentially in time and that single-particle velocity correlations decay approximately algebraically in time with different exponents for directions perpendicular and parallel to the particles’ long axes. We interpret our measurements using a Langevin theory with frequency-dependent (colored) noise sources in which the dependence of the anisotropic friction tensor on angle is responsible for coupling between orientation and displacement.

@incollection{statphys23_0297, abstract = {We studied the Brownian motion of ellipsoidal particles placed on a fine sieve in an upward flow of gas and investigated the effect of dissipative coupling of translational to rotational motion. By using digital video microscopy, we quantified the positions and orientations of individual particles. We found that angular correlations decay approximately exponentially in time and that single-particle velocity correlations decay approximately algebraically in time with different exponents for directions perpendicular and parallel to the particles’ long axes. We interpret our measurements using a Langevin theory with frequency-dependent (colored) noise sources in which the dependence of the anisotropic friction tensor on angle is responsible for coupling between orientation and displacement.}, added-at = {2007-06-20T10:16:09.000+0200}, address = {Genova, Italy}, author = {Park, Y. and Daniels, L. and Lubensky, T.C. and Durian, D.J.}, biburl = {https://www.bibsonomy.org/bibtex/278f5a314dfffaeb20121f8a06c98a0da/statphys23}, booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics}, editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano}, interhash = {7ca31ebdb9e58e5f3ae3491a38a114f7}, intrahash = {78f5a314dfffaeb20121f8a06c98a0da}, keywords = {brownian coupling ellipsoid equation gas-fluidized langevin motion particles rotational statphys23 to topic-3 translational}, month = {9-13 July}, timestamp = {2007-06-20T10:16:16.000+0200}, title = {Brownian motion of gas-fluidized ellipsoid particles.}, url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=297}, year = 2007 }