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Events: CFD-based Aircraft Drag Prediction and Reduction
Posted Thu November 21, 2002 @10:59AM
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News VKI Lecture Series Announcement:
CFD-BASED AIRCRAFT DRAG PREDICTION AND REDUCTION
3 - 7 February 2003, von Karman Institute, Belgium

Ever since the very beginning of aerodynamic flight, the accurate prediction of aerodynamic drag has been a major challenge in the aircraft design process. During the past 20 years, Computational Fluid Dynamics (CFD) has come to play an increasingly important role in this respect, but significant advances in CFD modelling capabilities are still needed. Future improvements in performance of transport aircraft (notably fuel efficiency and hence direct operating costs), will largely depend on reducing aerodynamic drag. This will be achieved by design optimization and technologies such as laminar flow control, areas in which CFD will play a vital role.

The objective of this Lecture Series is therefore to present the state-of-the-art and current research directions in CFD-based drag prediction. The course is aimed at applied aerodynamicists and CFD researchers as well as aircraft designers.

( Read Full Article | Events )


Application: How CFD Streamlines Fluid Designs
Posted Thu November 21, 2002 @09:46AM
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Application Machine Design has posted an article (in PDF format) on the use of CFD by engineers to solve troublesome flow problems. The story follows the design of a novel showerhead by the Moen Company.

At our company, for example, we use CFD to improve fixtures such as showerheads and valves, and faucets by predicting spray and flow patterns, reducing them in size, increasing their efficiency, and letting them do more. The software lets us pay close attention to fluid dynamics early in a productís development.
CFD software lets engineers refine designs through several iterations in as little as a day. Features such as interactivity with MCAD, easier-to-use meshing algorithms, and user-friendly GUIís have placed the analysis software into a daily-use toolbox for design engineers. Understanding how it differs from the structural analysis of finite elements and knowing what to look for in charts and images lets design teams get more out of the technology.

( Post Comment | Application )


NIKA Releases EFD.Lab 3.0
Posted Wed November 20, 2002 @04:58PM
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News NIKA today announced the availability of EFD.Lab 3.0, the latest release of its hottest selling stand-alone fluid flow and heat transfer simulation program. Based on the principles of Engineering Fluid Dynamics (EFD), EFD.Lab offers unsurpassed ease-of-use, design and analysis power to the engineering community. With its latest release, EFD.Lab now supports Non-Newtonian liquids, surface-to-surface radiation and enhanced pre- and post-processing. As a result, EFD.Lab is now more tailored to meet the special requirements of design cycle integrated fluid flow and heat transfer simulation.

"With our latest release of EFD.Lab, NIKA continues its philosophy of obtaining higher fluid flow simulation efficiency and satisfying user requests," explained Roland Feldhinkel, CEO, NIKA GmbH. More than 80 % of the new features included in EFD.Lab 3.0 are based on customer and prospect suggestions. "The addition of Non-Newtonian analysis allows our customers to conduct simulations that more accurately represent real-life operating conditions."

( Read Full Article )


CFD User-Experience Website Opened
Posted Wed November 20, 2002 @12:18PM
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News Dr. A.Ivanov writes "Welcome to a site devoted to private experience of application of CFD software PHOENICS. It gives opportunity to download PHOENICS Shareware v. 1.5. It also contains a lot of links to other CFD resources and just interesting information."

( Post Comment )


Application: CFD Helps Wright Brothers Fly Again
Posted Tue November 19, 2002 @11:27AM
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Application Orville and Wilbur Wright would be amazed! Their Wright Flyer is taking off again. By interweaving cutting-edge technology of today and historical data from the brothersí efforts, the Wright Again project hopes to engage the next generation of scientists and engineers in a virtual laboratory on the Internet.

Working closely with the High Performance Computing, Education, and Research Center (HPCERC) at the University of New Mexico and NASA Ames Research Centerís Fluid Mechanics Laboratory, project directors Jani Macari Pallis, Ph.D., who is CEO of Cislunar Aerospace, Inc. and Karen Elinich, Director of Education and Technology at The Franklin Institute hope to reach the next generation of engineers and aviation scientists with an ongoing website as virtual lab.

Via a web-based curriculum developed by Dr. Pallis and The Franklin Institute, students will follow the course of Wilbur and Orvilleís travails from their early interests as children, to the early disappointments in 1901 until the successful flight of December 17, 1903. The virtual environment substitutes computer codes for wind tunnel and flight facilities. Students can reproduce the Wright Brothersí wind tunnel test and see flow details the two brothers never imagined.

( Read Full Article | Application )


Application: CFD Aids Development of New Casting Process
Posted Fri November 15, 2002 @05:24PM
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Application By Thomas Staubli and Antonio Di Miele,
HTA Lucerne,
University of Applied Sciences of Central Switzerland

The production of metal strip by pouring molten steel between two rotating cylinders was first attempted in the 19th century. But it has taken the development of new materials and coatings, and newly acquired expertise in cooling and automation to make the process viable. The technology is now developing at a fast pace worldwide, and pioneer plants are providing first results. Economically, the process is extremely attractive, since smaller amounts of sheet metal can be produced locally and, with a minimum amount of subsequent working, very cost-efficiently.

The process employs two counter-rotating parallel rolls, against who's cooled surfaces the molten steel solidifies. Solidification begins just below the meniscus and shell growth continues as it moves downwards through the melt pool. At the kissing point, the two shells are essentially fused together forming a continuous strip, which then exits the caster downwards. Since the melt pool is small compared to that in conventional casters, the metal delivery has to be treated very carefully and good flow conditions in the melt pool are essential for faultless strip quality. Conventional delivery nozzles cannot be used, as inhomogeneity of flow in the melt pool is reflected in the strip quality. Similarly, the meniscus of the liquid steel must be stable, as any disturbance, wave or vortex at the free surface leads to unstable solidification and defects in the strip.

( Read Full Article | Application )


 
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