Boundary Layer: A thin region ... On the steady-state concentration and hydrodynamic fields close to a rotating hemispherical electrode with concentration dependent viscosity and diffusivity.

Internal and external flows with friction, Reynold's number, laminar and turbulent flows. Mathematical development of the hydrodynamic boundary layer. Boundary layer separation and fluid dynamic drag.

Here we revisit the Plateau–Rayleigh instability of a liquid coating a fibre by varying the hydrodynamic boundary condition at the fibre–liquid interface, from no slip to slip.