This in-water experimental study deals with the effects of after-body on FIV response round and sharp edge cylinders. Different circular, square, diamond, right-angle isosceles triangular cross-sections are investigated. The cylinder is examined in four different symmetrical unsymmetrical configurations respect to incident flow. current towing tank experiments form a basis for feasibility cylinders energy converters. results indicate that flat side perpendicular flow have galloping type...

The advantage of permeable breakwaters over more traditional types has attracted great interest in the behavior these structures field engineering. main objective this study is to apply 19 well-known machine learning regressors derive best model innovative breakwater hydrodynamic with reflection and transmission coefficients as target parameters. A database 360 laboratory tests on low-scale used establish model. proposed models link seven dimensionless parameters, including relative chamber...

Abstract Seawater intrusion is one of the most serious issues to threaten coastal aquifers. Tourian aquifer, which selected as case study, located in Qeshm Island, Persian Gulf. In this first vulnerability region seawater assessed using chloride ion concentration value, then by autoregressive integrated moving average (ARIMA) model, predicted for 14 wells 2018. The results show that aquifer experiences moderate and area affected wide danger expanding. It also found 0.95 km2 a state high with...

The extensive death toll and sever economical damages brought by the 2004 Indian Ocean tsunami has emphasized urgent need for assessing hazard of in this ocean, determining most vulnerable coastlines to impact possible tsunami. In paper southern coasts Iran bordering is discussed. At first, historical data occurrences on Iranian are collected, described analyzed. Then, numerical simulation potential tsunamis Makran subduction zone performed wave height distribution along coast calculated....

Development of a numerical model which describes launching offshore jackets from barge is presented in this paper. In model, addition to capabilities commercial softwares, water entry forces on jacket members and an implicit Newmark solution technique are included. The results general agreement with other software’s available (SACS). Fluid acting the importance each one discussed. It observed that horizontal very significant may locally govern design these members. This force more important...

Abstract. Disaster risk is a function of hazard and vulnerability. Risk defined as the expected losses, including lives, personal injuries, property damages, economic disruptions, due to particular for given area time period. assessment one key elements natural disaster management strategy it allows better mitigation preparation. It provides input informed decision making, increases awareness among makers other stakeholders. Virtual globes such Google Earth can be used visualization tool....

Abstract. The well-known historical tsunami in the Makran Subduction Zone (MSZ) region was generated by earthquake of November 28, 1945 Coast North Oman Sea. This destructive killed over 4,000 people Southern Pakistan and India, caused great loss life devastation along coasts Western Iran Oman. According to report "Remembering Tsunami", compiled Intergovernmental Oceanographic Commission (UNESCO/IOC), maximum inundation Chabahar port 367 m toward dry land, which had a height 3.6 meters from...

In this research, the behavior of tube-in-tube BRBs (TiTBRBs) has been investigated. a typical TiTBRB, yielding core tube is located inside outer restraining one to dissipate energy through extensive plastic deformation, while remains essentially elastic. With aid FE analyses, monotonic and cyclic proposed TiTBRBs have studied as individual brace elements. Subsequently, detailed finite element model representative single span-single story frame equipped with such TiTBRB constructed both...

The liquid flow and the free surface shape during initial stage of dam breaking are investigated.A numerical scheme is developed to predict wave an unsteady, incompressible viscous with surface.The method involves a two dimensional finite element (2D), in vertical plan.The Naiver-Stokes equations for conservation momentum mass Newtonian fluids, continuity equation, full nonlinear kinematic free-surface were used as governing equations.The mapping solve highly deformed problems common waves...

The liquid flow and the free surface shape during initial stage of dam breaking are investigated.A numerical scheme is developed to predict wave an unsteady, incompressible viscous with surface.The method involves a two dimensional finite element (2D), in vertical plan.The Naiver-Stokes equations for conservation momentum mass Newtonian fluids, continuity equation, full nonlinear kinematic free-surface were used as governing equations.The mapping solve highly deformed problems common waves...

Although northwestern Indian Ocean has experienced some deadly tsunamis in the past, this region remains one of least studied regions world and little research work been devoted to its tsunami hazard assessment. In study, we compile analyze historical present a list for region. Then, deterministic method employed give preliminary estimation faced by different coastlines Different source scenarios are considered each scenario, numerical modeling is performed. For case, maximum positive wave...

Platform structures are commonly utilized for various purposes including offshore drilling, processing and support of operations. A jacket is a supporting structure deck facilities stabilized by leg piles through the seabed. In design, operational environmental loads very important must be investigated intensively to secure stability during their life, as well installation phase. The main purpose this research evaluate compare results physical numerical modeling launch operation jackets from...