Compressibility effects in the hydrodynamic theory of Brownian motion

Robert Zwanzig, Mordechai Bixon

Research output: Contribution to journalArticlepeer-review


The velocity correlation function of a Brownian particle in a viscous compressible fluid is studied in the limit of very small compressibility. The main effect of compressibility is an initial rapid change of the particle mass from a real inertial mass to a virtual mass.

Original languageEnglish
Pages (from-to)21-25
Number of pages5
JournalJournal of Fluid Mechanics
Issue number1
StatePublished - May 1975


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