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They are termed 'passive scalars' if they do not a?
In the early 1940s, not much was known about distributions of passive scalars in turbulent shear flows.
His own contributions form the backbone of our present understanding of turbulent scalar transport, of fine-scale structure of passive scalars in turbulence, and of the phenomenon of outer intermittency.
Kraichnan's last major work proposed a fluid-dynamical framework for studying intermittency that quickly led the younger generation to identify the mathematical mecha- nism of intermittency and also to calculate by perturbation theory the anoma- lous scaling exponents for Kraichnan's passive scalar model.1
This approach works for any linear dynamics with a random linear operator, such as the prob- lems of turbulent advection of a passive scalar or the Schro牡inger equation with random potential.
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