3D Numerical Modeling of Stratified Flows: Case Study of the Bosphorus Strait

Abstract The spillway rating curve of the Riam Kiwa Dam was investigated via theoretical formula, laboratory experiment, and 3D numerical modeling. It is an ogee type with two uncontrolled and five gated spillways with a total length of 77.5 m. The experiment was performed with a scale of 1:50, while the numerical modeling was conducted using FLOW-3D software. Several discharge values (16.67–2,652.7 m3/s) were tested and observed for two different scenarios of gate openings. For the low discharge in Scenario 1, the theoretical formula and FLOW-3D computed the rating curve less accurately with the error values greater than 10%. A similar phenomenon was observed in Scenario 2, where both theoretical formula and FLOW-3D predicted the rating curve accurately with error values less than 10% for the higher discharge. The discharges tend to be overestimated for the water depth values greater than 2 m giving the average discharge deviation of 6% for the PMF condition. FLOW-3D was found to calculate water depth for all scenarios accurately. It shows a promising approach between numerical simulation and physical modeling, to minimize laboratory model construction costs.

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Numerical Modeling of the Effect of Duration of Barotropic Forcing on Sea Strait Flow: Case Study of the Bosphorus Strait

Journal of Hydraulic Engineering ◽

10.1061/(asce)hy.1943-7900.0000783 ◽

2013 ◽

Vol 139 (11) ◽

pp. 1199-1211 ◽

Cited By ~ 3

Author(s):

Mehmet Öztürk

Keyword(s):

Numerical Modeling ◽

Bosphorus Strait ◽

Flow Case

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HARBOR AGITATION DUE TO OFFSHORE SHIP WAVES USING SWASH: A CASE STUDY OF KUMKAPI YACHT PARK, ISTANBUL

Coastal Engineering Proceedings ◽

10.9753/icce.v36.currents.12 ◽

2018 ◽

pp. 12

Author(s):

CÃ¼neyt Baykal ◽

GÃ¼lizar Ã–zyurt TarakcÄ±oÄŸlu ◽

Emrecan IÅŸÄ±k

Keyword(s):

Numerical Modeling ◽

Free Surface ◽

Numerical Model ◽

Coastal Waters ◽

Rotational Flow ◽

Ship Waves ◽

Safety Requirements ◽

Flow And Transport ◽

Bosphorus Strait

This study presents the results of a numerical modeling study on the harbor agitation in case of offshore ship waves using SWASH (acronym for Simulating WAves till SHore), a numerical model developed for the simulating unsteady, non-hydrostatic, free-surface, rotational flow and transport phenomena in coastal waters as driven by waves, tides, buoyancy and wind forces (Zijlema et al. 2011). The study area is the Kumkapi Yacht Park, at the Marmara coast of Istanbul, 2.5 km west of the southern entrance of Bosphorus strait. The yacht park is currently used as a fishery harbor, which is severely affected by the ship waves of ferries and sea buses passing nearby almost parallel to the main breakwater of the harbor (aligned from west to east). The park is planned to berth a total of 140 yachts varying from 5 m to 40 m in length (Figure 1). For this purpose, the present harbor layout together with several alternative plans have been studied numerically to investigate agitation due to ship waves of ferries and sea buses considering the design safety requirements of ASCE (2012) for the safe mooring and berthing of yachts.

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