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New Software: TGS Announces the Release of amira 3.1
Posted Mon December 15, 2003 @02:34PM
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Post Processing TGS is proud to announce the release of version 3.1 of amira®, amiraDev™, amiraVR™, as well as the new amiraVR.Cluster™ for Windows® 98/2000/NT/XP, UNIX, Linux® and Linux on the 64-bit Itanium2™ platform. amira is TGS’s flagship 3D analysis and visualization application package offering the end-user innovative capabilities to easily and interactively analyze complex 3D data sets.

amira 3.1 will offer its users greater functionality by increasing the standard set of features and by adding extensions including PC cluster support. This new release is now available for download from the TGS website,

amira supports a wide range of applications within the following fields such as numerical simulations (finite element analysis, power generation), computational fluid dynamics and hydrodynamics, crash analysis and simulation, material sciences and quality control, physics, electromagnetism, oil & gas exploration and geosciences, environmental and energy.

( Post Comment | New Software )

Application: Automated Optimization of Automotive HVAC Design
Posted Mon December 15, 2003 @10:03AM
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Application When Visteon Climate Control Systems sought assistance in optimizing its automotive heating/air conditioning systems, they chose Optimal Solutions. Optimal Solutions’ Sculptor™ software gave the design engineer the ability to interactively modify (deform) and automatically optimize the CFD mesh models without remeshing so that they were able to modify an existing defroster design quickly and efficiently, resulting in significantly improved performance of the system, as well as demonstrating Sculptor™s ability to decrease time-to-market.

Using the one-of-a-kind Arbitrary Shape Deformation (ASD) technology developed by Optimal Solutions’ engineers, an ASD volume was designed to deform the defroster CFD grid to improve performance without having to remesh.

( Read Full Article | Application )

New Software: A New STAR is Born at AIAA Aerospace Sciences!
Posted Fri December 12, 2003 @09:39AM
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News The CD adapco Group cordially invites you to attend a party to celebrate the exciting launch of the world’s next generation CFD code, STAR CCM+ January 5, 2004, 7.30 - 8.30pm Room N5, AIAA Aerospace Sciences, Reno (January 5-8)

Aside from great food and drink, a presentation entitled “The next generation of CFD – STAR-CCM+” will be hosted by the lead developer of the code, who will discuss benefits of the new state-of-the-art technology including:

  • A preconditioned coupled solver for all flow speeds
  • A fully integrated interactive analysis environment
  • Compatibility with all major mesh generation packages

All attendees of the party will also be entered into a free drawing for a next generation telescope.

If you would like to attend, or even if you are unable to attend, but would like to receive further information about STAR CCM+, please visit our website.

We look forward to seeing you there!

( Post Comment | New Software )

Need Some CFD Advice
Posted Thu December 11, 2003 @06:15PM
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Help Desk ken writes "I appreciate any sort of advice or guildlines here. I am using CFdesign to simulate the turning of a two bladed propeller. All experimental data is in NASA CR 196702. So basically this is a verification exercise.

I know in finite element space time decoupled formulation, the size of the time step affects both stability and accuracy. Here is the situation I have: In my first test case, I used this time step and get 90% matching in thrust and power. I consider that good enough. On the second case, initially using the same time step as test case 1, my converged solution only matches about 75% with experimental data. The difference between test case 1 & 2 is the case 2 has a higher propeller RPM, while the free stream Mach number and blade pitch setting is kept constant (To be more specific, M tip 1 = 0.77, M tip 2 = 0.89). The mesh of both cases are identical too. Therefore I decided to further reduce the time step and now i got 95% percent matching on thrust and power.

Here comes my question. How would I justisfy my approach of using different time step for the same type of analyses when I am dualing with real problems without known experimental data? Critics will shoot me on this "taking incosistent approach issue". So what should I reply them?"

( Post Comment )

The Growth of CFD
Posted Wed December 10, 2003 @10:08AM
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News Mechanical Engineering Magazine has posted a feature article about the growth of CFD from an academic interest to a heavily relied upon industrial tool.

The article also discusses the move toward combined CAD and CFD packages, a move which mirrors the development of FEA and allows for analysis during design.

"Historically, analysis has been relegated to the research and development departments, or the tail end of the design process," Vincent Harrand of CFD Research said. "Imagine the design engineer who, with minimal training or experience, can assess a series of geometrical variants or a series of unique approaches and determine within minutes fluid flow, heat transfer, thermal or structural stress, or any number of other physical phenomena."

( Post Comment )

FLOMANIA Workshop Proceedings Available
Posted Tue December 09, 2003 @09:52AM
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News Proceedings are available from the FLOWMANIA project's recent workshop on detached-eddy simulation (DES) turbulence modeling. Detached-eddy simulation is a hybrid model containing both traditional Reynolds Averaged Navier Stokes (RANS) turbulence modeling, eg. k-epsilon, and more advanced large eddy simulation (LES) modeling.

RANS modeling is computationally efficient and is known to work well in attached boundary layer flows where the turbulent eddies are "attached". LES modeling, while significantly more expensive computationally, is known to work well in separated flows with "detached" eddies. The DES model is designed to use the RANS and LES modes where appropriate in the flowfield.

The proceedings detail the method and also show some interesting results which indicate the strong potential for this method.

( Post Comment )

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