Breaking bore: Physical observations of roller characteristics
نویسندگان
چکیده
منابع مشابه
Turbulent advances of a breaking bore: Preliminary physical experiments
In an estuary, a tidal bore may be generated at the leading edge of the flood tidal wave during the early flood tide under spring tide conditions into a narrow funnelled channel. For Froude numbers greater than 1.4–1.6, the leading edge of the bore is characterised by a breaking roller. The roller is characterised by a sudden increase in water depth, a highly turbulent flow with large-scale vor...
متن کاملAtmospheric noise of a breaking tidal bore.
A tidal bore is a surge of waters propagating upstream in an estuary as the tidal flow turns to rising and the flood tide propagates into a funnel-shaped system. Large tidal bores have a marked breaking roller. The sounds generated by breaking tidal bores were herein investigated in the field (Qiantang River) and in laboratory. The sound pressure record showed two dominant periods, with some si...
متن کاملNumerical simulation of a weak breaking tidal bore
0093-6413/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.mechrescom.2009.09.008 * Corresponding author. Tel.: +33 (0) 540 003 307; E-mail addresses: [email protected] (P. Lubin), glock [email protected] (H. Chanson). A tidal bore is a natural and fragile phenomenon, which is of great importance for the ecology of an estuary. The bore development is closely linked with the tidal range and...
متن کاملUnsteady Turbulence Characteristics in an Undular Bore
When a river mouth has a flat converging shape with a tidal range exceeding 6 to 9 m, the river may experience a tidal bore. A tidal bore is a positive surge, and the aim of the study is to detail the turbulent field beneath an undular bore. New unsteady experiments were conducted in a large channel. Turbulence measurements were performed with high-temporal resolution using side-looking acousti...
متن کاملBreaking tidal bore: comparison between field data and laboratory experiments
A tidal bore is a surge of waters propagating upstream as the tidal flow turns to rising and the flood tide rushes into a funnel shaped river mouth with shallow waters. The present study focused on the unsteady turbulence induced by a breaking tidal bore through some physical modelling. The laboratory data were compared systematically with some field measurements conducted in the breaking bore ...
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ژورنال
عنوان ژورنال: Mechanics Research Communications
سال: 2015
ISSN: 0093-6413
DOI: 10.1016/j.mechrescom.2015.02.008