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Education: PTC Offers Free Software to Educators
Posted Thu May 09, 2002 @03:02PM
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Geometry PTC, has announced it is providing educators worldwide with design software and other cutting edge teaching resources to help young people master the use of technology and prepare for careers in design, technology and engineering.

As part of its expanded Partnership for Innovative Learning, PTC will provide educators with its Pro/DESKTOP and Pro/ENGINEER design software, affordable teacher training, instructional materials and other resources that are often too costly for school systems and institutions of higher education.

PTC's program allows children as young as nine to think and create in three dimensions with sophisticated design software typically used by manufacturers.

Additional information about how to participate in the Partnership for Innovative Learning may be obtained by visiting the web site or by e-mailing

( Post Comment | Education )

New Software: Fluent Inc. Releases POLYFLOW 3.9
Posted Wed May 08, 2002 @03:31PM
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ANSYS FLUENT Fluent Inc. has announced the release of POLYFLOW 3.9. This software, created to aid in the simulation of laminar flows through dies and molds during such processes as extrusion, blow molding, glass forming, and fiber spinning, features new enhancements that help simplify and automate much of the user's work, while further extending the capabilities of the software.

This new release is based on five major pillars: adaptive meshing, non-conformal meshing, enhancements and extension of viscoelastic models, elasticity-based remeshing, and a new user-friendly environment.

Adaptive and non-conformal meshing help the user to build an accurate computer model of the equipment design to be simulated, particularly for complex, real-world models, such as dies for window profiles and rubber seals, and coextrusion or fiber spinning equipment.

The advanced viscoelastic modeling capability in POLYFLOW 3.9 widens the realm of possibility for modeling tricky viscoelastic flows. Elasticity-based remeshing capabilities provide further flexibility in the modeling of flows, which deform in three dimensions.

The new POLYMAN user environment is a Windows-like interface that consolidates all the tools in the POLYFLOW suite for easy access.

POLYFLOW 3.9 is available on UNIX and NT platforms.

( Post Comment | New Software )

Application: CFD Analysis of Missile Aerodynamics
Posted Wed May 08, 2002 @01:53PM
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Application Desktop Engineering has posted a story on CFD Analysis of Missile Aerodynamics. The study covers a novel grid fin for supersonic missles.

A grid fin is a lifting and control surface that differs from a typical solid fin. The grid fin uses a honeycomb design that allows air to pass through the fin rather than bypass around it. One advantage of grid fins is the ability to maintain lift at higher angles of attack since grid fins do not have the same stall characteristics as planar fins. Another advantage is their very small hinge moment, which can reduce the size of control actuator systems. A third advantage is that their curvature has little effect on performance, so that folding the fins down onto the missile body is a storage design bonus.

The U.S. Army Research Labís viscous CFD analysis method has created a visual representation of airflow around the missile and through the fins. This method also provides numerical parameters such as axial forces and drag coefficients that are needed to accurately predict the trajectory. One challenge in developing a viscous CFD model for this purpose was creating an analysis mesh of the grid fin geometry.

( Read Full Article | Application )

Application: CFD Helps Develop Smaller Jetted Tub Motor
Posted Tue May 07, 2002 @05:15PM
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Application Emerson Motor Company, USA, recently used CFD to reduce the size of electric motors used to power jetted bathtubs. Emerson engineers knew their challenge would be to maintain low winding temperatures and when the first prototype ran hot, their suspicions were confirmed. Excessive winding temperatures can lead to breakdown of the electrical insulation and premature motor failure.

The established approach would have been to change the design by either adding copper and steel or changing the ventilation method, build a new prototype and evaluate the temperature reduction achieved. This process required approximately ten iterations, each taking close to a month, in order to obtain an acceptable design. Because of the slow pace and high cost of this approach, Emerson decided to use CFD instead. Emerson engineers chose CFX-TASCflow from AEA Technology to create a virtual prototype based on the original design.

( Read Full Article | Application )

Research: Calling for sample datasets
Posted Mon May 06, 2002 @02:02PM
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Unstructured Martin Isenburg writes "Hello, I'd like to find some unstructured example meshes composed of hex, tet, prism, and pyramid elements or any compatible subset thereof. I am mostly interested in the geometry and the connectivity of those meshes. Does anyone have such example meshes or knows of a public source for such test data?

We need this test data (ideally in some simple ASCII format) for academic research on connectivity compression for unstructured volume meshes. Thanks"

( Post Comment | Research )

New Software: Gridgen Version 14 Released
Posted Mon May 06, 2002 @01:04PM
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Grid Generation Pointwise has released the latest version of their CFD meshing software Gridgen.

The cornerstone feature of Gridgen Version 14 is Glyph, a new Tcl-based scripting language. Using Glyph, engineers can create customized meshing applications and utilities that significantly reduce the effort required to perform a computational fluid dynamics (CFD) analysis. "Glyph helps both expert and novice analysts", said John Chawner, Pointwise's president. "The novice analyst can use a customized, Glyph-scripted application that hides all the meshing details while the expert analyst can use Glyph to customize Gridgen for his or her way of working. In both cases Glyph allows the analyst to concentrate on the product, not the mesh."

Gridgen Version 14 also features Native CAD Import, import of CAD models in triangular (STL) format, automatic joining and decimation of surface meshes, baffle faces, a mirror transform, several new grid diagnostic functions, integration of the grid examine command with the elliptic solver, and export filters for CFD++, CRUNCH, and NCC.

( Post Comment | New Software )

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