Conference proceeding
On the similarities and differences between thermally-driven lock-exchange flows in fully and partially-vegetated channels
RIVER FLOW 2016, pp.828-833
2016
Abstract
The paper discusses similarities and differences between lock-exchange flows in Fully Vegetated (FV) channels where the vegetated canopy occupies the whole channel and Partially Vegetated (PV) channels when the canopy layer occupies only part of the upper layer (floating vegetation). The vegetated canopy is modelled as an array of horizontal cylinders with a constant solid volume fraction, SVF. The depths of the canopy layer in the two PV cases are h = 0.28 H and h = 0.47 H, respectively, where H is the channel depth. For the PV cases, the initial temperatures in the warmer open-water region and in the cooler vegetated-canopy region are considered uniform over the depth and length of the two regions. Though important differences are observed in the structure of the free-surface current among the PV and FV cases, numerical simulations predict that the power law exponent in the law describing the temporal variation of the front position with time is the same for all cases (3/4) during the quadratic drag-dominated regime. For PV cases with a relatively high h/H, where most of the free surface current propagates through the canopy layer, the structure of the free surface current is close to that observed in the corresponding FV case.
Details
- Title: Subtitle
- On the similarities and differences between thermally-driven lock-exchange flows in fully and partially-vegetated channels
- Creators
- A Y OzanG Constantinescu
- Contributors
- D Hanes (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- RIVER FLOW 2016, pp.828-833
- Language
- English
- Date published
- 2016
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984231918502771
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