Derives the cosmological Péclet number (Pecosm) by rewriting the Friedmann equation in drift-diffusion form. The dark energy transition at z~0. 7 is the cosmic Pe=1 crossing; inflation is a T4 drift runaway; the CMB is a Pe~1 critical snapshot; black holes are maximum-opacity voids (Void Index 12/12) ; Jeans instability is V* crossing for structure formation; and color confinement is asymptotic D3 at the quark scale.
Anthony W. Eckert (Fri,) studied this question.