Journal article
Gravity currents propagating over periodic arrays of blunt obstacles: Effect of the obstacle size
Journal of fluids and structures, Vol.27(5), pp.798-806
2011
DOI: 10.1016/j.jfluidstructs.2011.01.006
Abstract
Gravity currents are considered that propagate over a series of identical ribs with square cross sections. Both large-eddy simulations and a shallow-water approach are applied to assess the influence of rib height and Reynolds number. The simulations elucidate the physical mechanisms governing the time-dependent evolution of the drag force, which are dominated by the formation of a recirculation region immediately downstream of each rib, in conjunction with a supercritical, jet-like flow region above and behind the rib, and an upstream propagating hydraulic jump that forms as a result of the interaction between the gravity current and the neighboring rib immediately downstream. The corresponding shallow-water analysis yields fair agreement, indicating that simplified models can provide useful information for the present class of flows.
Details
- Title: Subtitle
- Gravity currents propagating over periodic arrays of blunt obstacles: Effect of the obstacle size
- Creators
- T Tokyay - Department of Civil and Environmental Engineering, University of Iowa, United StatesG Constantinescu - Department of Civil and Environmental Engineering, University of Iowa, United StatesE Gonzalez-Juez - Department of Mechanical Engineering, University of California, Santa Barbara, United StatesE Meiburg - Department of Mechanical Engineering, University of California, Santa Barbara, United States
- Resource Type
- Journal article
- Publication Details
- Journal of fluids and structures, Vol.27(5), pp.798-806
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.jfluidstructs.2011.01.006
- ISSN
- 0889-9746
- eISSN
- 1095-8622
- Language
- English
- Date published
- 2011
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9983992037902771
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