Limits on Turbulent Transport: Charles
Doering, University of Michigan
Mathematical bounds on mass, momentum and
heat transport for solutions of the incompressible Navier-Stokes and Boussinesq
equations are reviewed. In some cases the scaling indicated by the bounds
is (nearly) saturated by turbulent flows, but in some cases---most notably
turbulent Rayleigh-Benard convection---there remains a large gap between
experiments and the rigorous heat transport limits. We discuss some current
research exploring these issues further.