Anomalous hydrodynamic interaction in a Quasi-two-dimensional suspension

Bianxiao Cui, Haim Diamant, Binhua Lin, Stuart A. Rice

Research output: Contribution to journalArticlepeer-review


The correlated Browninan motion of micron-sized particles suspended in water and confined between two plates was investigated. The transverse coupling was found to be negative; i.e, particles were found to exert "antidrag" on one another when moving perpendicular to their connecting line. It was observed that the interaction decays with interparticle distance r as 1/r2, faster than in unconfined suspensions but slower than near a single wall. The results show that these effects arises from the two-dimensional dipolar form of the flow induced by single-particle motion.

Original languageEnglish
Article number258301
Pages (from-to)258301-1-258301-4
JournalPhysical Review Letters
Issue number25 I
StatePublished - 25 Jun 2004


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