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A 39m catamaran operating near the critical hump speed of 18 knots has been optimized through parametric variation. Design objectives included the quality of the flow on the propeller plane and the required power. The catamaran, which was originally designed for a much higher speed of 32 knots, already showed a relatively good performance for the new design speed. Applying STAR-CCM+ in combination with the parametric design and optimization platform FRIENDSHIP-Framework allowed a very economic adjustment, keeping the hull form mostly unchanged. The enhanced flow on the propeller plane was...
Part of the art of engineering is in deciding exactly how much complexity can be excluded through modeling assumption, without reducing the overall quality of the prediction. In fact, at it's purest, engineering might be described as the "art of simplification through modeling approximation", rendering apparently intractable physics problems into neatly packaged engineering solutions. By making the correct modeling assumptions you can accurately predict how an abstract design will perform under a range of real world operating conditions. Make the wrong assumptions and your simulation results...
Advanced features of STAR-CCM+, such as Volume Of Fluid, DFBI and overset grid techniques have made it possible to simulate extreme waves and their interaction with floating structure to provide essential design information such as wave run up, air gap, green water and wave impact load. However, the application of the Numerical Wave Tank (NWT) for floater design remains challenging due to its computational cost, especially for the simulation of the floater response in irregular waves. Simulation of irregular waves by a NWT requires a computational domain large enough to simulate the nonlinear...
MSI Kenny is a multinational CFD consultancy company in the oil and gas industry. Projects have included erosion prediction using Lagrangian multiphase techniques which could be considered as more of an art than a science. However, the results can provide valuable insight into areas where erosion could be a problem. The setup of this type of analysis is far from straightforward. A numerical grid that is suitable for single phase flow could produce erroneous results which could go unnoticed as there is usually very little reliable experimental data available to validate the model. Erosion...
Fires pose a significant threat to personnel safety and asset integrity in the oil and gas industry. Several accidents involving fires have led to significant loss of lives and equipment over the last 40 years – the Piper Alpha and the BP Macondo disasters are notable examples. Modeling the consequences of fires in the oil and gas industry is an important part of the risk assessment process for the design of facilities, ranging from onshore installations to offshore drilling rigs and vessels such as FPSOs and floating LNG liquefaction plants. The fire-related risks involve mainly smoke...
Flow-induced vibrations of subsea piping due to external flow - for example, VIV of pipeline spans - and/or internal flow - for example, high velocity multiphase flow in a manifold - pose structural integrity concerns in terms of cyclic stressing and associated cumulative fatigue damage. Assets in the design stage or in the operating stage which fail a screening based on published guidelines, e.g. DNV or EI guidelines, may undergo a more detailed screening based on numerical simulation. This presentation will give an overview of such a screening, based on Computational Fluid Dynamics (CFD)...
One of the many research areas at the University of Utah Institute for Clean and Secure Energy is to assist in the commercial utilization of the vast energy stored in domestic oil shale and oil sands resources. We are exploring in-situ thermal treatment technologies of oil shale development because of their potential for reducing environmental footprints. We are taking the novel approach of applying High Performance Computing (HPC) using STAR-CCM+ and Validation and Uncertainty Quantification (V/UQ) to perform Computational Fluid Dynamics (CFD) based simulations to quantitatively predict...
The oil and gas industry faces many engineering challenges. New field developments in ultra-deep water, long subsea tie-backs with challenging production conditions and harsh marine environments place increasing demands on production equipment, its installation as well as its operation. In addition, operation of ageing offshore facilities and field life extension can test safety and process engineering systems to the full. In many of these areas, engineering simulation can provide invaluable insight, knowledge and engineering solutions and there is still much potential for development of...
Turbulent heat transfer is an extremely complex phenomenon which has challenged turbulence modelers for many decades. A limited number of momentum transfer models and not a single turbulent heat transfer model are available in commercial codes, except for the turbulent Prandtl number concept, which consists in applying the Reynolds analogy between the momentum and the thermal field. It was found, as expected, that the more sophisticated heat transfer models available in some academic codes were superior to the models available in commercial codes. In addition, in the case of liquid metal heat...
The Spallation Neutron Source (SNS) is an accelerator-based neutron source at Oak Ridge National Laboratory (ORNL). The SNS facility provides the most intense pulsed neutron beams in the world for scientific research and industrial development. The liquid mercury target, moderators and beryllium reflectors are contained inside the inner reflector plug. The main objectives of the redesign of the inner reflector plug are simplifying its disposal and increasing its neutronic performance. The inner reflector plug is actively cooled by flowing heavy and light water through a maze of channels...

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