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The commercial CFD code STAR-CD 4.02 is used as a numerical simulation tool for flows in the supercritical water-cooled nuclear reactor (SCWR). The basic heat transfer element in the reactor core can be considered as round tubes and tube bundles. Reactors with vertical or horizontal flow in the core can be found. In vertically oriented core, symmetric characters of flow and heat transfer can be found and two-dimensional analyses are often performed. However, in horizontally oriented core the flow and heat transfer are fully three-dimensional due to the buoyancy effect. In this paper,...
The commercial CFD code STAR-CD 4.02 is used as a numerical simulation tool for flows in the supercritical water-cooled nuclear reactor (SCWR). The basic heat transfer element in the reactor core can be considered as round tubes and tube bundles. Reactors with vertical or horizontal flow in the core can be found. In a vertically oriented core, symmetric characters of flow and heat transfer can be found and two-dimensional analyses are often performed. However, in a horizontally oriented core the flow and heat transfer are fully three-dimensional due to the buoyancy effect. In this paper,...
FORCE Technology and Grontmij│Carl Bro in Denmark have been involved in a joint project under DCMT (Danish Centre for Maritime Technology). Based on promising CFD results obtained in , and plus indications that the rudder size or type and rudder leading edge-propeller distance could influence the propulsive power, the goal of this project was to investigate the fuel saving effect of different rudders and their longitudinal position behind the ship. Further, the intension was also to study pre-swirl stators located in front of the propeller. The investigation was conducted as a combination of...
Innovations in Engineering Simulation for Today’s Electric & Hybrid Vehicles
This event provides viewers with the latest information on engineering simulation technology impacting the development of Electric & Hybrid vehicles. Presenters cover applications in electric aircraft, satellite technology and other alternative forms of transport.
This paper presents the application of state-of-the-art Computational Fluid Dynamics (CFD) simulations to sailing and motor yachts. It aims to demonstrate that simulations are a good alternative to tank testing for the super and mega yacht industry. The simulations are based on experience gathered over the last few years designing high performance racing boats, especially in America's Cup and Volvo Ocean Race campaigns, the Formula One of the seas. CFD is one of the new technologies that can, as was done in the auto industry, be successfully transferred from the racing environment to general...
One aspect of the Westinghouse AP1000™ 1 reactor design is the reduction in the number of major components and simplification in manufacturing. One design change relative to current Westinghouse reactors of similar size is that AP1000 reactor vessel has two nozzles/hot legs instead of three. With regard to fuel performance, this design difference creates a different flow field in the reactor vessel upper plenum. The flow exiting from the core and entering the upper plenum must turn toward one of the two outlet nozzles and flow laterally around numerous control rod guide tubes and support...
The major shortcoming namely short-circuiting of fresh charge into atmosphere of a two-stroke engine has been correlated to the spatially and temporally changing in-cylinder velocity patterns. In a small engine, modifications in the cylinder head for carrying out experiments to investigate the gas exchange phenomenon become extremely difficult. CFD study offers the effective alternative for such investigations and this study has been undertaken to develop a model using a commercial CFD code STAR-CD and study the gas exchange process in a small 100 cc SUZUKI two-stroke engine. The geometric...
Rising fuel prices and stricter regulations on emissions drive a quest for more fuel efficient ships that is reminiscent of the 1970s, when after the first oil shock a plethora of fuel saving devices was investigated. Examples are Schneekluth ducts (wake equalizing ducts), Grim vane wheel, Grothues spoilers,or asymmetric aftbodies, Schneekluth and Bertram (1998). Many of the “propulsion improving devices”of the 1970s are now again under debate. More than a generation later, we start basically again from scratch. The original reports on efficiency gains are often incomplete and invariably...
Technology Update on Battery Design
A s the electrification of transport increases so does the need for ever more refined simulation techniques to predict component and system performance. This electrification trend has been growing over recent years with vehicles now available including hybrid, plug-in Hybrid and fully electric vehicles from a variety of manufacturers. Since CD-adapco and Battery Design LLC first released their flow, thermal and electrochemistry simulation tools 2 years ago, there has been significant product development driven by customer feedback and a desire to continue to lead this emerging field. This...
The design of a buoyancy valve for a renewable energy thermal storage tank led us to this interesting CFD problem. The purpose of the valve is to allow water to circulate within the system when the temperature of the water rises above a critical value. From Archimedes principle, a buoyancy oat made from a given material will rise (providing a closed state for the valve) when below a critical temperature and sink (providing an open state for the valve) when above a critical temperature. However, the precise valve response depends on internal temperature and mass- ow dynamics. In this paper, we...

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