Investigation of Dam-Break Flow Over Abruptly Contracting Channel With Trapezoidal-Shaped Lateral Obstacles
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Dosyalar
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
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Yayıncı
Asme
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The present paper aims to investigate the dam-break flow over dry channel with an abrupt contracting part in certain downstream section. A new experiment was carried out in a smooth-prismatic channel with rectangular cross section and horizontal bed. A digital imaging technique was adopted for flow measurement and thus flood wave propagation was sensitively obtained. Synchronous filmed images of the dam-break flow were nonintrusively acquired with three cameras, through glass sidewalls of the channel. Free surface profiles and time evolution of water levels were derived directly from the recorded video images using virtual wave probe without disturbing the flow. Furthermore, the present study highlights the formation and propagation of the negative bore due to abruptly contracting channel. The measured results were compared with the numerical solution of Reynolds averaged Navier-Stokes (RANS) equations with k-epsilon turbulence model and good agreement was achieved. New experimental data can be useful for scientific community to validate numerical models. [DOI: 10.1115/1.4007154]
Açıklama
Anahtar Kelimeler
dam-break, unsteady flow, negative bore, abrupt contraction, virtual wave probe
Kaynak
Journal of Fluids Engineering-Transactions of The Asme
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
134
Sayı
8
