Abstract: A modified diffusion equation for a passive scalar is proposed. It is similar (but not equal) to the ?telegraph? equation and describes also ?finite-velocity? diffusion. It is shown that earlier countergradient, or better, ...

Abstract: The transport of nonreactive and reactive bottom-up and top-down diffusing scalars in a solid-lid convective boundary layer is studied using large-eddy simulation (LES). The chemistry considered consists of an irreversible, ...