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FEATURE: How Multigrid Solver Acceleration Works
Posted Fri November 30, 2001 @05:59PM
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Solver We've got a new feature article cooked up on the multigrid acceleration method which is used by most of the commercial CFD codes today.
However, iterative solvers, while memory efficient, are notoriously slow. The multigrid acceleration technique speeds up iterative solvers tremendously allowing for realistic CFD models which otherwise would not be feasible on today's computers.
The article explains the pitfalls of iterative solvers and how the multigrid method achieves its remarkable results.

Read this article and others in the Features Section.

( Post Comment )

Solid Modelling 2002
Posted Thu November 29, 2001 @09:50AM
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Announcements Solid Modelling 2002 Exhibition & Seminars
13 - 14 March 2002, National Motorcycle Museum, Birmingham

The UK's dedicated CAD/CAM/CAE event now in its 4th successful year. See all the leading vendors under one roof with their newest releases. 70+ booths with top flight solutions ranging through - Modelling, Analysis, Visualisation, Prototyping, Internet and Project Management.

Past exhibitors include IBM/Catia, UGS, SolidWorks, Autodesk, Alias Wavefront, Think 3, MCS, Delcam, SDRC, VX Corporation, PTC, 3D Systems, SRAC etc. SM2002 exhibitor updates on web site from January 1st.

Seminars include an RPD day hosted by the IMechE/RPMA. Also a ‘Solid Modelling Justification’ day, featuring independent experts and end user companies, to help managers assess benefits available to them and explore issues of selection, implementation, cost justification, ROI etc. All supported by actual case studies showing how others have tackled the 2D to 3D Solids transition and what they'd do differently if they could begin afresh.

Tel: 0207 681 1000

( Post Comment )

BRN Names New VP of Marketing
Posted Wed November 28, 2001 @07:20PM
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News Blue Ridge Numerics, developers of the CFdesign CFD package, have announced the naming of Jim Spann as the company's new Vice President of Marketing. Spann is charged with expanding CFdesign's presence in the global engineering market.
“The tremendous growth of CFdesign within mainstream engineering and product development organizations around the world necessitated the addition of a seasoned CAE marketing professional to help us build on this momentum, foster strategic partnerships, and lead key business development initiatives,” Ed Williams, Blue Ridge Numerics president and CEO says. “Jim will help us enormously in these efforts.”

( Post Comment )

Pointwise Releases Gridgen V14 Beta
Posted Mon November 26, 2001 @10:46AM
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Grid Generation The latest version of Pointwise's flagship CFD pre-processor, Gridgen, was recently released for beta testing. Gridgen V14 marks a major enhancement to the Gridgen software.

The most significant new feature is the Glyph scripting language. Glyph is an advanced "high level" language which will provide users with the ability to generate CFD grids parametrically. Glyph also features a journaling capability which allows playback of an interactive Gridgen session.

"CAE analysts have been pushing for better integration of CFD into the design process for years", said John Chawner, Pointwise's president. "By working closely with customers very early in the development cycle we were able to develop Glyph with capabilities that meet their specific requirements for customization, automation, and interoperability."

Another feature added to Gridgen for V14 is the ability to import native CAD files from a number of popular CAD programs. The ability to skip neutral file formats, such as IGES, streamlines the CFD process for Gridgen users.

In addition, this version of Gridgen will allow users to treat faceted triangular surfaces as geometry for mesh generation. Gridgen supports faceted surfaces in STL, VRML and other popular formats.

( Post Comment )

Aeroacoustic Analysis Using STAR-CD
Posted Thu November 22, 2001 @08:29AM
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News In this article, CD adapco have described the type of aeroacoustic analysis possible with their CFD software. Aeroacoustic analysis, or noise prediction, is of primary interest for comfort and safety considerations in many industry sectors, such as, automotive, aerospace, and rail.

STAR-CD offers two methods for the prediction of noise. The first is aimed at capturing broad-band turbulence-based shear noise. The turbulence fields from a steady-state Reynolds Averaged Navier Stokes (RANS) simulation are post-processed to predict the shear-noise distribution in the flow field. This is a new feature in the STAR-CD software.

A second method, used for predicting coherent noise, utilizes the transient flow solver to predict the combined convection and pressure wave effects acting on surfaces. The standard RANS turbulence model and transient flow solver have long been a part of the STAR-CD package.

These two methods allow the CFD engineer to predict both resonant and broad-band based noise in the flow field.

( Post Comment )

Application: ESA's Use of CFD on the ISS
Posted Wed November 21, 2001 @11:47AM
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Application The European Space Agency (ESA) is using CFD in the design of enviromental control facilites in the Automated Transfer Vehicle (ATV) and to predict gas impingement forces in the sensitive Columbus laboratory on the International Space Station (ISS).

The ATV is used for delivering equipment and consumables to the ISS and for orbital re-boosting when the ISS has lost altitude due to atmospheric friction. The Integrated Cargo Carrier (ICC) module, located at the front of the ATV, carries dry cargo which is placed in up to 8 racks mounted in the cylindrical portion of the ICC.

The ICC does not have an advanced enviromental control system, but does have a cabin fan designed to guarantee good ventilation and to ensure an adequate air distribution for crew comfort. Another primary goal of the fan is to avoid any stagnant flow regions in which toxic gases could accumulate and pose a suffocation threat to the astronauts. In addition, the air speed should be always lower than 0.25 m/s in the crew cabin, whereas the air temperature should be less than 28°C, but more than the minimum dew temperature of 16°C. Also, the 'touch temperatures' of surfaces exposed to the crew should not exceed 45°C.

Rather than build an expensive experimental apparatus to test the flow field in the ICC, ESA turned to CFDRC for CFD software which could be used to predict the flow field within the ICC.

( Read Full Article | Application )

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Software Cradle

  • Interview with the Head of CFX Engineering Software Development
  • A Visit Inside CFX Engineering Software
  • Endangered Fish Benefit from CFD
  • Optimization of Marine Components Using CFD
  • A Case for Application-Specific CFD Meshing
  • Are Structured Methods Still The Workhorse?
  • Do GUIs Help or Hurt?
  • How Multigrid Solver Acceleration Works
  • CFD Modeling of an Internal Rotary Pump
  • State of the Art in Grid Generation
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    Tuesday November 20

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  • Wednesday November 14

  • FEATURE: CFD Modeling of an Internal Rotary Pump (0)
  • Tuesday November 13

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  • Monday November 05

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  • Thursday November 01

  • HELP: Orthogonality in a Grid Over a Car (0)

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