Linear bioconvection in a suspension of randomly swimming, gyrotactic micro-organisms

Martin Alan Bees, N.A. Hill

Research output: Contribution to journalJournal articleResearchpeer-review


We have analyzed the initiation of pattern formation in a layer of finite depth for Pedley and Kessler's new model [J. Fluid Mech. 212, 155 (1990)] of bioconvection. This is the first analysis of bioconvection in a realistic geometry using a model that deals with random swimming in a rational manner. We have considered the effects of a distribution of swimming speeds, which has not previously received attention in theoretical papers and find that it is important in calculating the diffusivity. Our predictions of initial pattern wavelengths are reasonably close to the observed ones but better experimental measurements of key parameters are needed for a proper comparison. (C) 1998 American Institute of Physics.
Original languageEnglish
JournalPhysics of Fluids
Issue number8
Pages (from-to)1864-1881
Publication statusPublished - 1998


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