# Changes

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,  20:01, 14 February 2017
$Pe = \frac{(Diffusion \, timescale)}{(Convection \, timescale)}$

In diffusion dominated regimes, the Peclet number is less than zero. Such is the case with microfluidic systems, where turbulence is low. In convection dominated systems, this number is greater than one.
== Derivation ==