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Shuttle Disaster Investigators Turn to CFD for Answers
Posted Wed March 26, 2003 @05:19PM
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News Newsday is reporting that investigators are presuming that the shuttle sustained damage to its left wing earlier than previously thought and that the damage was masked by changes in aerodynamics which locally increased lift, thereby compensating for any damage.

Stephen Labbe, chief of the Applied Aeroscience and Computational Fluid Dynamics branch at Johnson Space Center, said last week that the shuttle experienced an unusual change in forces on its left wing between the shedding of two pieces of observed debris. Despite the presumed damage, he said, the orbiter "executed a perfectly nominal roll reversal," or banking of the wings, about two minutes after the two pieces of debris were shed. Significant damage, he said, can create "locally a very high pressure that is on the lower surface of the wing and starting to push up on the wing."

Labbe and other NASA officials told the board that wind tunnel tests and computational studies simulating various types of damage to the left wing have yet to provide a coherent explanation for all of the forces Columbia experienced before it broke apart. The teams plan to do additional studies that mimic more severe damage than originally postulated, including the loss of multiple leading edge panels rather than just one.

Investigators face a complex task with computational tools they have had to develop as they go. There are no good models, officials said, for what happens when hot gases penetrate a shuttle wing and pass through existing vents or directly attack aluminum spars and ribs.

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Events: New Series of Web-based CFD Demonstrations
Posted Wed March 26, 2003 @04:28PM
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ANSYS CFX ANSYS CFX will be holding a new series of web demonstrations. Each demonstration will be performed by a technical applications specialist live over the internet. The audio portion will be a telephone conference so the participants will be able to hear the presenter in real time and ask questions.

CFX-5 Live

For those unfamiliar with CFX-5, this demonstration illustrates the superior CFD technology available through CFX-5. Features of CFX-5 to be demonstrated include grid adaption, parallelization set-up and CFX Expression Language.
April 24 at 2 pm EDT
May 22 at 2 pm EDT
June 26 at 2 pm EDT

Introduction to CFX-BladeGen

CFX-BladeGen is a specialized easy-to-use three-dimensional software tool for the rapid design of rotating machinery components. It can be used to design axial, mixed flow and radial blade components in applications such as pumps, compressors, turbines, turbochargers, blowers and fans. A unique feature of the software is its 'Plus' module which enables rapid 3-D viscous flow screening of the design through an embedded and fully automated computational fluid dynamics (CFD) solver.
April 30 at 2 pm EDT
June 12 at 2 pm EDT

Please join us! For more information or to register visit the CFX Website.

( Post Comment | Events )


SGI Altix 3000 Delivers Performance and Productivity for MCAE Applications
Posted Mon March 24, 2003 @02:48PM
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Hardware SGI's Altix 3000 system combines the capabilities of Intel® Itanium® 2 processors, the open-source Linux® operating system, and SGI® NUMAlinkTM high memory bandwidth technology. The system has acheived world record performance on industry benchmarks, but it is performance on real-world applications that matters.

In recent tests using CD adapco Group's STAR-CD software for CFD simulation, the SGI Altix 3000 family demonstrated performance and scalability comparable to some of today's best UNIX systems.

"SGI continues to advance their HPC leadership in CFD with the introduction of the new SGI Altix 3000 server. Working together, SGI and CD adapco have achieved several breakthroughs in parallel scalability with STAR-CD simulations," said Peter S. MacDonald, president of adapco and general manager of CD.

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Events: ICEM CFD User Conference 2003
Posted Wed March 19, 2003 @10:45AM
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News ANSYS and ICEM CFD Engineering have announced the ICEM CFD European User Meeting. Over the last year many new features have been added to the core ICEM products and several new 'Vertical Applications' have also been introduced.

With the launch of ICEM CFD version 5 expected later this year now is an excellent opportunity to see what's coming and to discuss your future requirements directly with ANSYS / ICEM CFD Engineering.

The meeting will cover new features and products as well as user presentations and will give you the chance to meet fellow ICEM users from all over Europe.

Agenda
Venue
Register

( Post Comment | Events )


Expert Systems Advance Vehicle Aerodynamic Simulation
Posted Wed March 19, 2003 @10:27AM
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CD-adapco From the missile shaped design of the modern F1 Grand Prix racing car to the brick-like structure of a heavy truck, aerodynamics plays a crucial role in how well they behave on the road and how efficiently they perform the tasks they are designed for.

For all vehicles, ranging from small passenger vehicles to commercial buses and trucks, reducing air drag is one of the most efficient ways of improving fuel economy. For example, a 5% improvement in drag for a typical diesel engine heavy tuck, which can simply be achieved by improving the design of the wing mirrors, can result in fuel savings of around 500-1000 litres/year for a typical 150,000 km annual highway driving. On the other end of the scale, in motor racing fuel saving might not be the number one priority, but reaching very high speeds certainly is. To propel a typical Class 1 ITC racing car at 300km/h, around 30 kW of additional power is required for a car with drag coefficient of 0.40, compared to one with 0.36. And when you are operating at the limit of your engine, this can make the difference between winning or losing.

One of the first commercial systems to tackle the complex world of external aerodynamics simulation is es-aero. This is a knowledge-based expert system developed by the CD adapco Group and based on the CFD code STAR-CD. The knowledge and expertise embedded in the system comes from many man-years of knowledge and experience gained through the running and analysis of hundreds of external aerodynamic cases, by both the CD adapco Group and its clients and partners.

To read this article in full and discover other Expert Systems from CD adapco Group, visit their website.

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CFD Thesis Prize 2003
Posted Tue March 18, 2003 @09:29AM
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CD-adapco The CD adapco Group is continuing its popular CFD thesis prize program.

This year, we are once again seeking outstanding PhD theses, which represent important and original contributions to knowledge in the field of numerical techniques or physical models aimed at simulation of fluid flow, heat and mass transfer, and related processes. The following prizes shall be awarded:

1st prize: 3000 US$
2nd prize: 2000 US$
3rd prize: 1000 US$

The aim of these prizes is to stimulate research in the area of Computational Fluid Dynamics (CFD). Nominations are being accepted from all over the world until December 31 2003; theses up to one year old will be considered.

For more information on how to enter, please visit the Thesis Prize Website.

See this announcement for the 2002 winners.

( Post Comment )


 
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