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Application: Scanning Technology Enables CFD at Reynard
Posted Mon November 25, 2002 @05:37PM
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Application The differences between motor racing on two wheels and four go far deeper than just arithmetic. In Formula 1, for instance, races are routinely won and lost in the pits; on motorbikes, the archaic practice of overtaking is still regularly reported. It is behind the scenes, however – away from the cameras – that the real differences between the two sports really emerge.

At any particular race, a Formula 1 car represents the current state of the art, a snapshot in an ongoing multimillion-pound research and development project. Teams recognize the importance of the most advanced design, simulation and testing techniques – and spend, spend, spend accordingly. The teams that race high performance bikes are every bit as keen to succeed but here the emphasis tends to be more on fine tuning and trimming rather than turning out machines that evolve steadily (sometimes dramatically) throughout a season.

Part of this is down to motorcycle racing’s rules and regulations: in some races every entrant must ride an identical bike, so room for design innovation is distinctly limited. And money is certainly an issue. The fact that individuals still race on a reasonably competitive basis with their more highly funded rivals is a reflection of the fact that cash is spread somewhat thinner than in Formula 1 racing.

( Read Full Article | Application )

SGI Has Most Systems In Top 25 Ranking
Posted Mon November 25, 2002 @11:23AM
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Hardware SGI has once again achieved top ranking with more Top 25 ratings--across all categories--than any other vendor in the recently released IDC Balanced Rating benchmark. Designed by analyst firm IDC to rate expected sustained performance on real-world supercomputing applications, the report verifies the critical need for high-productivity computing capabilities to meet the current requirements of technical compute environments. SGI attributes this high ranking to its unique SGI® NUMAflexTM shared-memory architecture and optimized operating and development environment.

Highlights from the newest rankings include the following:

  • SGI leads with the most systems in the Top 25 across all of the seven categories ranked.
  • SGI submitted the most powerful computer in both the Single System Capability and Enterprise categories.
  • SGI is the only vendor to have systems in the Top 25 of all categories delineated by IDC.
  • SGI represents nearly one-quarter of the systems rated in the Top 25 of the respective categories submitted by nine vendors.
The IDC Balanced Rating report is among several recent industry statements indicating the change towards measuring high-productivity over theoretical peak performance. The Defense Advanced Research Projects Agency (DARPA) is also emphasizing productivity over unattainable theoretical performance as essential for a new generation of scalable, high-performance computing systems.

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Events: Turbulence and Heat Transfer Modeling Seminar
Posted Mon November 25, 2002 @09:12AM
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News Predicting heat transfer using eddy viscosity turbulence models often produces poor results mainly due to the low Reynolds number near-wall treatment and not so much from the underlying turbulence model. Studies by Wolfgang Vieser, Thomas Esch and Florian Menter of CFX have shown that using the CFX-5 SST turbulence model, in combination with an optimal wall treatment, does provide highly accurate results for a wide variety of heat transfer test cases. Dr. Florian Menter will be in Florida on December 11 presenting a seminar on this topic.

Topic: Turbulence and Heat Transfer Modeling in CFX-5

Date: December 11, 2002 during the PowerGen International Conference

Time: 9 am - noon

Location: Orlando, Florida

Visit the seminar website for more information and to register.

For more information on the SST turbulence model visit the CFX Website.

( Post Comment | Events )

New Software: Pointwise Releases Gridgen Update
Posted Fri November 22, 2002 @08:30AM
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Grid Generation Pointwise, Inc. has released version 14.04 of their flagship CFD pre-processing program Gridgen.

The latest release of Gridgen enhances functionality with new CFD solver interfaces (Splitflow and PHOENICS) and new graphics features (Zoom to Screen Extents and single increment rotations). Additionally, the elliptic PDE solver for structured grids is now up to 5 times faster and Glyph, Gridgen’s Tcl-based scripting language introduced in V14, continues to expand in scope to cover more and more of Gridgen’s functionality.

To learn more about the new features in Gridgen V14, visit the Pointwise website at

( Post Comment | New Software )

Events: CFD-based Aircraft Drag Prediction and Reduction
Posted Thu November 21, 2002 @10:59AM
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News VKI Lecture Series Announcement:
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 product’s 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 GUI’s 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 )

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