In potential flow it is neither necessary nor useful to put the viscosity to zero. In viscous potential theory, viscosity is not neglected and irrotational flow of a viscous fluid satisfies Navier-Stokes equations. However, ...

Spatially Varied Flow (SVF) theory with increasing discharges based on the principle of conservation of momentum are applied to river flows to evaluate the flow profiles, depths, discharges, velocities and !roude numbers ...