Modeling of the Changes in Flow Velocity on Seawalls under Different Conditions Using FLOW-3D Software

Deilami-Tarifi, Maryam; Askar, Mehdi Behdarvandi; Vahid, Chegini; Haghighipour, Sadegh

doi:10.4236/ojms.2016.62026

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…The difference in the hydraulic and geometry characteristics causes a complexity in flow hydraulic and creates an interaction between the main channel and floodplains, resulting in an apparent shear stress and a transverse momentum transfer [4]. The study area is Naiband Gulf located in the Persian Gulf with geographical location 27˚25'0"N and 52˚35'0"E located in Assaluyeh in South East Bushehr province that is on the list of small bays and covers an area of approximately 4127 hectares [5].…”

Section: Materials and Research Methodsmentioning

confidence: 99%

Evaluation of Sediment Transport in the Naiband Gulf Area Using Mike21

Soltani¹,

Askar²,

Bahrami³

et al. 2017

OJG

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Naiband Gulf is part of Naiband National Park known as Iran's first marine national park. It is Iran's most important habitats in the northern Persian Gulf due to mangrove forests, coral community, and community of marine animals. The study examines the sediment transport in the Naiband Gulf and around it, where to achieve this. First, the required data including coastline information, sediment profile, and bathymetry information and waves are obtained. Then by Mike21, 2011 Version models, it was attempted to simulate waves and currents due to it in the coastal zone to determine the rate and direction of sediment transport in the Naiband Gulf area. The results obtained in this study indicate that the majority of sediment transport directions on both sides of the gulf have been internal. The existence of structures in the north and south of the Gulf has reduced alongshore sediment flows and sedimentation, especially in the south of the gulf that is a serious threat to corals.

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Section: Materials and Research Methodsmentioning

confidence: 99%

Evaluation of Sediment Transport in the Naiband Gulf Area Using Mike21

Soltani¹,

Askar²,

Bahrami³

et al. 2017

OJG

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show abstract

“…The difference in the hydraulic and geometry characteristics causes a complexity in flow hydraulic and creates an interaction between the main channel and floodplains, resulting in an apparent shear stress and a transverse momentum transfer [4]. This research investigates the change of the velocity on seawall crown by considering the obstacles in different layouts and slopes [5]. The intended slopes for seawalls were 22, 27, 32, 39 degrees, respectively and the roughness heights on wall surface were 15 cm, 20 cm and 30 cm.…”

Section: Introductionmentioning

confidence: 99%

Investigation Flow Depth and Flow Speed Changes in the Karun River

Hagivar¹,

Askar²,

Moalemi³

2017

OJMS

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In the present study, the Karun River in Khuzestan province in Iran is that is somehow considered the river with the most water in the country was examined. To examine the depth and speed of the flow, which undoubtedly have the greatest impact on the environment and ecosystem of the river, twodimensional simulation by CCHE2D model was used. In this study, it was observed that, firstly, the changes of depth and velocity along the river have good coordination and the highest changes were observed in the meander and arches. Moreover, due to using two-dimensional model, there is the possibility of examining changes of parameters in the longitudinal and transverse direction that shows the two-dimensional model is an efficient and powerful model in studying river flows.

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“…The phenomenon of wave overtopping, especially regarding the protection structures of cities and installations, such as coastal walls and dykes is important because overtopping through these structures can lead to structural damage and loss of life or financial losses. As shown in the figure below, wave-overtopping processes is the collision of the wave to structure, upstream, and eventually overflow of water from the structure [1] [2]. This phenomenon has caused many damages in coastal structures and their existing structures in the past and present.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Effect of Tetrapod Block and Armor X block on Reducing Wave Overtopping in Breakwaters

Nourani¹,

Askar²

2017

OJMS

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As the Armor shape has a significant effect on the reduction of wave overtopping, this study compares the performance of various shapes of concrete armored blocks of X block and Tetrapod as the most suitable armors. In this study, a three-dimensional numerical model was used for simulation of the effects of waves on the armors of Tetrapod and X Block breakwaters. In this regard, in order to calibrate the numerical model, a sample of conventional stone armor has been selected and using available experimental data on the design of armor such as wave overtopping, wave height, period of waves and energy density of the required spectral range of wave verification was conducted on a numerical model. In this regard, it is necessary to calibrate all the conditions of the model including boundary conditions, numerical modeling, initial conditions, numerical solvers and other parameters in the numerical model and simulation error rate is determined. The maximum error of the numerical model for the relative height values of the impact waves on the structure of breakwater is 7.87% for different conditions. Accordingly, the maximum error of the numerical model in determining overtopping values is 7.81%. The average fluctuation value of overtopping in the X block armor has dropped by about 31% compared to the tetrapod armor.

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Modeling of the Changes in Flow Velocity on Seawalls under Different Conditions Using FLOW-3D Software

Cited by 10 publications

References 2 publications

Evaluation of Sediment Transport in the Naiband Gulf Area Using Mike21

Evaluation of Sediment Transport in the Naiband Gulf Area Using Mike21

Investigation Flow Depth and Flow Speed Changes in the Karun River

Comparison of the Effect of Tetrapod Block and Armor X block on Reducing Wave Overtopping in Breakwaters

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