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Research: Density Functional Theory Simplifies Multiphase Simulation
Posted Fri July 09, 2004 @10:19AM
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News Traditional Eulerian multiphase simulation suffers from numerical problems at phase interfaces due to the large local density variation (eg. 1000:1 for water/air). The result is numerical instability and the need for a highly refined mesh at the (usually unknown/moving) interface location.

Density functional theory, however, describes the multicomponent multiphase mixture continuously without density jumps at interfacial surfaces. This is achieved by the introduction into the Helmholz energy, or into the entropy, square component density gradient terms. As a result the hydrodynamics of multiphase mixtures is described in a unified way meaning the governing system of equations is the same at any point in space.

( Post Comment | Research )

New Software: Open Source Tetrahedral Mesh Generator Available
Posted Thu July 08, 2004 @02:14PM
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Grid Generation TetGen version 1.3, a quality tetrahedral mesh generator and 3D Delaunay triangulator, has been released.

TetGen generates exact Delaunay tetrahedralizations, constrained Delaunay tetrahedralizations, and quality tetrahedral meshes. The latter are quality conforming Delaunay and nicely graded if no input angle is smaller than 60 degree.

The development of TetGen is supported by the pdelib project of Weierstrass Institute for Applied Analysis and Stochastics in the research group of Numerical Mathematics and Scientific Computing.

( Post Comment | New Software )

Events: NAFEMS World Congress 2005 - Call for Papers
Posted Thu July 08, 2004 @02:04PM
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Announcements NAFEMS, the International Association for the Engineering Analysis Community, will hold its 10th World Congress on the island of Malta from the 17th – 20th May 2005. The conference will bring together world leading industrial practitioners, consultancies, academic researchers and software developers with a common interest in engineering analysis, finite element analysis, and computational fluid dynamics. The event will provide an exclusive insight into established methods and best practices, along with a vision of how future technologies will have an increasing impact on the product development process.

NAFEMS are now inviting submission of papers for inclusion in the Congress programme. Papers are being accepted from all areas of engineering simulation, under the following broad headings:

  • Practical Applications of Simulation
  • Analysis as an Engineering Tool
  • Simulation Techniques & Technologies
  • Successful use of Analysis through Effective Training
  • Numerical Methods

With a reputation for technical excellence and innovation, the NAFEMS World Congress is the ideal forum to share experiences, exchange ideas, and gain recognition for innovative work in the simulation field.

( Read Full Article | Events )

CD adapco Software to Aid BMW ORACLE Racing
Posted Wed July 07, 2004 @08:03AM
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News Dating from 1851, the America’s Cup is the oldest and most desired trophy in the world of sailing. In the 32nd edition of the America's Cup, BMW ORACLE Racing team will be striving to win the America’s Cup from the title holder Team Alinghi, the defending champions

BMW ORACLE Racing, is employing the best possible technology in its racing yacht design development. In order to study the dynamics of flow, the design team has selected the CD adapco Group, the leading global provider of computational engineering solutions, to provide CFD (Computational Fluid Dynamics) software.

“For this demanding work we require precision, production capability and some specific functionality only found in CD adapco Group’s software. We work the software hard to achieve an optimal design for our sailors to take into battle for the America’s Cup,” says Ian Burns, BMW ORACLE Racing, Design Coordinator. “By working alongside CD adapco Group we gain a great advantage from having the right tool combined with a great team. We all share a common goal: success.”

( Read Full Article )

Waterman Group to use FLUENT CFD Software
Posted Tue July 06, 2004 @03:50PM
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News Leading mechanical engineering and environmental consultancy, The Waterman Group, has signed an agreement with Fluent Europe Ltd to use its world leading FLUENT CFD software.

The Waterman Group will be applying CFD modelling to areas of its consultancy services including internal ventilation, to design energy efficient natural ventilation schemes, and external flow modelling, which allows the company to accurately predict pedestrian comfort. The company has been involved in the design of a number of major projects, both in the UK and abroad. FLUENT CFD software is currently being used to predict airflow movement to assess occupant comfort for an atrium design study at Saint Katharines Dock (K2) in London, and to model internal ventilation for the White City project in London.

Commenting on the new deal, Vartan Moskofian, Associate designate at The Waterman Group, says: "CFD modelling is an increasingly important aspect of our consultancy services as it allows us to assess a design at the conceptual stage before it is built. However, as with all things, the quality of the tool being used is important to get the right result and in FLUENT we believe we have the best there is."

( Post Comment )

Paper on SIMPLE/R Algorithm Available
Posted Mon July 05, 2004 @01:27PM
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News Maciej Matyka has updated his paper titled "Solution to Two-Dimensional Incompressible Navier-Stokes Equations with SIMPLE, SIMPLER and Vorticity-Stream Function Approaches. Driven-Lid Cavity Problem: Solution and Visualization."

It is available in a PDF format on his home page.

( Post Comment )

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