Heat and mass transport across diffusive interfaces bounded by turbulent convecting regions

The vertical transport of heat and solute across a stable diffusive interface separating two turbulent convecting regions of different concentration is experimentally investigated. Convection in this case is driven by sideways heating such that the horizontal interface separating the convecting regions is sandwiched between two opposite flowing turbulent boundary layers. Flux laws, for the vertical heat and solute transport are developed. These laws are then used to study the effect of changes in layer size and number on vertical transport in multilayered convecting systems. It is found that the vertical transport in such systems is independent of convecting layer size or number.