Mixed advection

Note that this is very different from a steady open flow with no chaotic advection where the escape time cannot be arbitrarily large. The exponential distribution is a consequence of the chaotic dynamics, since over the characteristic timescale of the flow (T) advection mixes up and redistributes the fluid elements within the mixing zone. Therefore roughly the same proportion ss nT of the remaining particles escape after each time T. This leads to the exponential decay... 

Currents transport, or advect, the oil from a spill site. Oil slicks travel downwind at 2.5. 0% of the wind velocity (Kennish, 1999). Light oils spread faster than heavy oils. The spreading rate is more rapid at higher than lower temperatures and depends on the volume and density of the oil. As wind and wind waves develop, the slick breaks up into distinct patches of oil that drift slowly apart by horizontal eddy diffusion. Subsurface advection mixes the oil in subsurface waters to depths of about 10 m vertical diffusion plays a less integral role in subsurface mixing of the oil. 

Figure 3.25 Advective mixing caused by the motion od elementary water streamlets in porous medium between cross-sections A and B (Fetter C. W, 1994)...

The rate of mass transport depends not only on the diffuse and advective mixing. Significant impact on the rate of mass transport have chemical and biochemical processes. In the process of migration, components may form. 

Novel melt-blending technologies such as chaotic advection mixing process to make structured morphologies (e.g., micro- or nanolayered) containing blend products. 

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