Analyses of the spatial structure and hydrodynamic regimes of the liquid-him flow over a rotating cone surface and application of this analysis to the liquid-phase how in spinning-cone-distillation columns (SCC) are presented. Based on the results obtained in dimensionless form, a diagram of the flow zones (the inner inlet-dependent, the intermediate Coriolis, and the outer centrifugal zones) and regimes (the laminar, the wavy-laminar, and the fully turbulent regimes) in terms of the SCC operating conditions is developed, and a relationship between the changes in flow pattern and the scale of SCCs is established. Specifically, we find that the radial how structure is similar at all scales of the presently available range of spinning cone columns, and the flow regime is turbulent for all operating conditions in commercial scale, but not necessarily in laboratory-scale columns. Implications of these findings to the possible nature of flooding in SCCs are discussed.