  We investigate theoretically and experimentally classical advective transport
in a 2D electron gas in a random magnetic field. For uniform external
perpendicular magnetic fields large compared to the random field we observe a
strong enhancement of conductance compared to the ordinary Drude value. This
can be understood as resulting from advection of cyclotron guiding centers. For
low disorder this enhancement shows non-trivial scaling as a function of
scattering time, with consistency between theory and experiment.
