Mellor, G. L., 1975: A comparative study of curved flow and density-stratified flow. Journal of the Atmospheric Sciences, 32 (7), 1278-1282.

Abstract: A semi-empirical theory, used to predict buoyancy effects in a density- stratified and shear-driven flow, is also applied to the case of a boundary layer with curvature. Curved flow data are available and interesting in their own right since it can be seen that the Reynolds stress is reduced to zero at a critical "curvature Richardson" number predicted reasonably well by the theory.