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Now showing items 1-2 of 2

  • Effective diffusion of scalar fields in a chaotic flow 

    Turner, M. R.; Gilbert, Andrew D.; Thuburn, John (American Institute of Physics, 2008)
    The advection of a tracer field in a fluid flow can create complex scalar structures and increase the effect of weak diffusion by orders of magnitude. One tool to quantify this is to measure the flux of scalar across contour ...
  • The influence of periodic islands in the flow on a scalar tracer in the presence of a steady source 

    Turner, M. R.; Thuburn, John; Gilbert, Andrew D. (American Institute of Physics, 2009)
    In this paper we examine the influence of periodic islands within a time periodic chaotic flow on the evolution of a scalar tracer. The passive scalar tracer is injected into the flow field by means of a steady source term. ...