Abstract
We explore a new application of the quadrant method in the context of the double-averaged Navier-Stokes equations for studying open channel flow near rough beds. Quadrant analysis is applied to spatial disturbances of time-averaged velocity components, using the experimental data from flow over two-dimensional regular transverse square-bar roughness. The spatial velocity disturbances change periodically performing a full cycle over a single roughness element, so that the quadrant diagrams are regular closed orbits. A colour code is used to produce a quadrant map of the flow cross-section, which reveals contributions from each quadrant to the time-averaged momentum transfer.
Original language | English |
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Pages (from-to) | 413-423 |
Number of pages | 11 |
Journal | Experiments in Fluids |
Volume | 42 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2007 |
Keywords
- turbulent-boundary-layer
- channel flow
- wall
- canopies
- smooth
- bed