Hydraulics of nappe flow regime
Abstract
For a given flat step geometry, low flows behave as a series of free-falling jets with nappe impact onto the downstream step: i.e. nappe flow regime (Section 1.3). At the upstream end of each step, the flow is characterised by a freefalling nappe, an air cavity and a pool of recirculating fluid (Figs 3.1 & 3.2 ). Air bubble entrainment occurs at both the upper and lower jet interfaces, with additional air being entrained by a plunging jet mechanism at the intersection of the lower nappe with the recirculating pool.
Fields of Study & Subjects
Hydraulic flow and structures
Fluid Dynamics and Turbulent Flows
Cavitation Phenomena in Pumps
Publication details
- Journal / source
- CRC Press eBooks
- Pages
- 87–118
- Publication date
- 11 February 2026
- Language
- EN
- Document type
- Book chapter