Turbulent Fluid Acceleration Generates Clusters of Gyrotactic Microorganisms
نویسندگان
چکیده
منابع مشابه
Turbulent fluid acceleration generates clusters of gyrotactic microorganisms.
The motility of microorganisms is often biased by gradients in physical and chemical properties of their environment, with myriad implications on their ecology. Here we show that fluid acceleration reorients gyrotactic plankton, triggering small-scale clustering. We experimentally demonstrate this phenomenon by studying the distribution of the phytoplankton Chlamydomonas augustae within a rotat...
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.......................................................................... iii Sammanfattning ..................................................................... iv List of publication ............................................................... v Acknowledgments ............................................................... vii
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A Lagrangian study of two-dimensional turbulence for two different geometries, a periodic and a confined circular geometry, is presented to investigate the influence of solid boundaries on the Lagrangian dynamics. It is found that the Lagrangian acceleration is even more intermittent in the confined domain than in the periodic domain. The flatness of the Lagrangian acceleration as a function of...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2014
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.112.044502