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Seminar on "Life at High Reynolds Numbers" 
Monday, 30 July 2012,  3:00 -  4:30
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Bacteria and plankton populations living in oceans and lakes reproduce and die under the

influence of turbulent currents. Turbulent transport interacts in a complex way with the

dynamics of populations because the typical reproduction time of microorganisms is well

within the inertial range of turbulent time scales. We investigate the role of chaotic/turbulent

flows on the dynamics of populations.

 

We use a surface compressible flow as a toy model for oceanic flows. The compressibility in

our model mimics the food variability and inertia of the populations. We show that the

presence of compressible advecting flows leads to a dramatic reduction in the population

concentration and fixation times. We also discuss the results for populations with same or

different inertia in two dimensional chaotic incompressible flow. We find that small

variabilities in inertia leads to long-lived co-existing states.

Location Conference Hall, C-MMACS New Bldg.
Contact Krishna Mohan
Speaker: Prasad Perlekar, Postdoctoral Fellow, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands

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