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BMT delivers CFD study for oil major offshore Nigeria to calculate current coefficients.

The design, engineering and risk management consultancy's scope of work included an assessment of the current loading to which the FPSO hull is subjected to, which has enabled the oil major to ensure its mooring systems are fit for purpose

BMT Fluid Mechanics (BMT), a subsidiary of BMT Group Ltd, the leading international design, engineering and risk management consultancy, has recently completed a comprehensive Computational Fluid Dynamics (CFD) study for an oil major operating offshore Nigeria.

BMT's scope of work included an assessment of the current loading to which the FPSO hull is subjected to, which has enabled the oil major to ensure its mooring systems are fit for purpose. Johnathan Green, mManager for BMT Fluid Mechanics' Numerical Modelling Group explains: "CFD is becoming more commonplace in the oil and gas sector with many customers recognising it to be an effective tool for solving challenges the industry faces in a less conservative and more efficient manner. In this project, we were able to use CFD to more accurately analyse the hydrodynamic forces caused by current and waves and asses the subsequent effect these forces have on the bilge keels of the vessel which are designed to stop the vessel from rolling."

Through the creation of a 3D CAD model and representation of the FPSO below the water line, the team of specialists at BMT were able to run a comprehensive experimental and numerical study of the manoeuvring characteristics. This looked at different parameters of current conditions to help build up a picture of how the forces and motions impact the vessel and how it performs.

Green continues: "BMT's extensive experience with shallow water hydrodynamics, manoeuvring simulation, hydrodynamic model testing and CFD allowed us to deliver against the customer requirements. The benefit of using CFD in this study is that the customer can use the less conservative loads estimated to help design the mooring systems.

CFD has a number of applications within the oil and gas market. BMT regularly uses CFD for consequence modelling (for example -- hydrocarbon fire and explosion and gas dispersion), flow assurance, and helicopter operations. Whilst the aim of all of our work is to ensure that risks to personnel, asset, and environment are reduced to as low as reasonably practicable (ALARP) and although there may be a focus in today's current economic climate on reducing capital expenditure, BMT strongly believes that optimising design early on in a project can considerably reduce costs by avoiding conservatism."

BMT Fluid Mechanics is internationally recognised as a leading independent specialist in the field of wind engineering, architectural aerodynamics and building physics. BMT is based in London (UK) with regional offices in Abu Dhabi, Hong Kong, Kuala Lumpur, New York and Singapore.

The company provides high-end specialist consultancy services for cost effective design of state-of-the-art building developments. The services draw upon in-house capabilities for computational modelling and boundary layer wind testing.

BMT is an international design, engineering and risk management consultancy, working principally in the defence, energy and environment, marine risk and insurance, maritime transport and ports and logistics sectors.

BMT invests significantly in research. Its customers are served through a network of international subsidiary companies. The group's assets are held in beneficial ownership for its staff.

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Publication:Oil & Gas News
Date:Jul 25, 2016
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