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10th International Meshing Roundtable
Posted Thu August 23, 2001 @06:59PM
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Announcements jrc writes "The 10th International Meshing Roundtable will be held 07-10 October 2001 in Newport Beach, California. More details may be found on the conference web site http://www.imr.sandia.gov/."

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CEI Releases Free Collaborative Tools
Posted Mon August 20, 2001 @10:09AM
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Post Processing CEI, makers of the visualization software EnSight, are releasing EnLighten and EnVideo free of charge on their web site.

EnLighten is a player which allows others to see your EnSight visualizations across the network.

EnLiten users can manipulate 3D models, view models and animations from different perspectives, and run a variety of 3D animations provided by EnSight users.

EnVideo plays a proprietary video format (evo) which offers better quality than AVI and MPEG video formats. The player can be embedded in MS Powerpoint, Internet Explorer or Netscape for presentations.

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CFDRC Unveils Fuel Cell Design App
Posted Fri August 17, 2001 @03:12PM
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ESI Group CFDRC is showing [pdf] a prototype design application for fuel cell stack optimization. The application follows the current trend of tailoring a CFD program to match the expertise of the end user. In the case of the fuel cell program, the input parameters are defined in terms customary to the engineer without a need for in-depth CFD knowledge.

The package handles geometry generation, mesh generation, model definition, computing the solution, and post-processing - all in terms familiar to the design engineer.

Most impressive is the ability to define custom "cost" functions for automatic optimization of the fuel cell stack. Several cost functions can even be combined for multi-dimensional optimization.

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Gridgen for Linux released
Posted Thu August 16, 2001 @04:57PM
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News Rick Matus writes "Pointwise Releases Gridgen for Linux Fort Worth, TX, August 20, 2001 - Pointwise today released Gridgen, their mesh generation and pre-processing software for computational fluid dynamics (CFD), for the Linux operating system.

"We're very excited about the Linux port of Gridgen" said Dr. John Steinbrenner, Pointwise's Vice President of Research and Development. "CFD engineers had submitted more requests for Linux than any other hardware platform." Gridgen's Linux port uses the most up-to-date drivers from graphics accelerator vendors to provide OpenGL hardware acceleration.

Scott Percival, a Gridgen for Linux Beta tester at the U.S. Navy Surface Warfare Center's Carderock Division, wrote that "I had all the power and capability of Gridgen on my PC without having to give up Unix" Another Beta tester at Lockheed Martin wrote that "We were very pleased with the Beta version and eagerly await the shipping version of Gridgen for Linux."

Gridgen is a meshing application for CFD that generates hexahedral, tetrahedral, and hybrid (prisms and pyramids) meshes. The software runs on the 5 major Unix platforms, Linux, and Windows operating systems. Gridgen is a complete meshing application and includes trimmed-NURB geometry import from CAD systems, meshing tools, and direct interfaces to CFD solvers such as Fluent, STAR-CD, and CFX. Gridgen reduces meshing time through:

  • Fault tolerant,"repairless" meshing of sloppy CAD models
  • High quality mesh cells - leading directly to high accuracy simulations
  • Responsive and knowledgeable tech support

Further information on Gridgen can be obtained from Pointwise's web site, http://www.pointwise.com.

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AVS Will Use CAVElib to Port Visualization System
Posted Wed August 15, 2001 @03:19PM
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Post Processing Advanced Visual Systems has licensed CAVElib from VRCO which will enable AVS to adapt its powerful AVS/Express MPE software development system to Linux, Solaris, Windows and HP-UX.

AVS/Express MPE allows rapid construction of immersive applications such as CFD data visualization and features extensions for full 3D stereo immersion using SGI Reality Center or CAVE systems.

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Application: Wastewater Treatment Optimized With CFD
Posted Wed August 15, 2001 @11:04AM
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Application Australian Paper's Maryvale mill is Australia's largest integrated pulp and paper producer. As part of the process, 55 Million liters/day of wastewater are produced and treated in a secondary system. An aerated lagoon forms the main component of the wastewater treatment system and a major problem with the lagoon is settlement of solids due to inadequate mixing. Historically, mixing effectiveness in aerated lagoons was calculated from emperical rules based on power input.

In order to gain insight into the mixing process in the lagoon, a CFD simulation was performed. The initial investigation examined the flow field generated by the wastewater inlet flow. The results showed that the Coanda effect (whereby a jet will "stick" to a wall) caused the inflow jet to be redirected towards a dividing wall setting up a recirculation back to the inlet along the outer bank of the lagoon.

The second investigation examined the effects of aerators installed in the lagoon. Aerators sit at the surface and draw water up from the depths and expell it radially. The investigation showed that the aerators were providing good mixing at the surface, but were ineffective near the bottom of the lagoon.

A solution was proposed which used a combination of aerators and mixers. Mixers sit near the bottom of the lagoon and pull water down from above and expell it radially. The results showed that the combination of aerators and mixers provided excellent mixing through out the lagoon.

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