this paper presents a k- turbulence model for simulation of steady current and itsinduced vortex shedding caused by the presence of an offshore pipeline. performance of the modelaround a circular cylinder above a wall with gap to diameter ratios of 0.1, 0.35 and 0.5 underdifferent flow regimes with reynolds numbers of 1500, 2500 and 7000 is studied. the flow field iscomputed with solving the re...

Pipe-in-Pipe (PIP) technology has been studied significantly owing to its superior performance in deep-water and high-pressure high temperature fields than conventional single pipe. The PIP system excellent track record of mitigating flow assurance problems from subsea wells through maintenance the fluid's It also applied marine environment where pipe cannot perform. However, complex interactio...

Successful decommissioning of subsea oil and gas infrastructure requires a safe effective approach to assess manage waste products. These products, often present as scale on internals pipelines, include naturally occurring radioactive materials (NORM) trace metals. Understanding the potential effects these contaminants marine fauna is crucial managing global decommissioning. This review compose...

The teleprogramming paradigm has been proposed as a means to efficiently perform teleoperation in the subsea environment via an acoustical link. In such a system the effects of both limited bandwidth channels and delayed communications are overcome by transmitting not Cartesian or joint level information but rather symbolic, error-tolerant, program instructions to the remote site. The operator ...

As the time between initial concept and commissioning of submarine cable systems decreases, the need for automated tools and procedures to facilitate the acceleration of the route and cable engineering processes increases. Cable installers are now faced with more projects and less time to design, engineer, and install these systems. These increased demands mean that, in many cases, traditional ...

the present sought to draw a comparison between model predictive control performance and two other controllers named simple pi and selective pi in controlling large-scale natural gas transport networks. a nonlinear dynamic model of representative gas pipeline was derived from pipeline governing rules and simulated in simulink® environment of matlab®. control schemes were designed to provide a s...