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BRN Offers Pro/E Tour
Posted Mon December 17, 2001 @04:15PM
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News Blue Ridge Numerics is offering a multimedia Guided Tour CD for users of Pro/Engineer. The CD showcases three examples of the high level of integration between CFdesign and the Pro/ENGINEER mechanical CAD system from PTC.
“We are offering an amazingly elegant solution for Pro/ENGINEER users,” says Jim Spann, vice president of Marketing for Blue Ridge Numerics. “This guided tour approach is a nice way to educate the thousands of engineers who face product performance challenges related to fluid flow and heat transfer.”
A free copy of the Guided Tour CD for Pro/ENGINEER users can be obtained by phone: 434-977-2764, Ext.108 or via the web site at

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CAD Vendors on Data Exchange
Posted Mon December 17, 2001 @12:17PM
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News Cadalyst recently asked six CAD vendors to address the problems with moving CAD data between applications. The article mainly speaks of moving data downstream to project management applications, but you can safely replace "project management" with "engineering analysis" in the description of data flow.

The CAD industry is (slowly) moving away from software co-existance to file translation to inter-process communication. The article describes the current capabilities and what is needed to make true CAD interoperability a reality.

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Metacomptech Releases CFD++ V3.1
Posted Fri December 14, 2001 @12:27PM
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News Metacomptech has released the latest version of their flagship CFD product. CFD++ Version 3.1 features additional physical models for conjugate heat transfer, porous media, swirling axisymmetric flow, an axisymmetric flow-straightener model, and a database of fluid properties.

The new version also has a number of enhancement for simulating rotating machinery and enhanced handling of multiple CPU runs.

Demonstrations of the new version will be available at the 40th AIAA Aerospace Sciences Meeting and Exhibit January 14-17, 2002.

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Is Your Solution Converged?
Posted Thu December 13, 2001 @08:10PM
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Solver In their latest newsletter, Fluent offers advice to engineers running CFD solutions on when to declare your solution converged.

The article covers the basics of solution convergence in a CFD simulation and discusses the level of convergence necessary for differing applications. For instance, a highly converged solution is required if you are examining minute details in the flow field as opposed to a case where you are simply looking for approximate flow features.

During the course of the iterative solution algorithm, the imbalance in each cell is a small, non-zero value that, under normal circumstances, decreases as the solution progresses. This imbalance is called the residual.
The article also describes some ways in which the solution convergence can be monitored. These include plots of the total residual, integrated quantities at surfaces (such as mass flow rate), and derived quantities, such as the drag coefficient.

In conclusion the article points out that solution convergence is only one part of overall simulation accuracy.

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CFD is Fundamental to Design
Posted Thu December 13, 2001 @03:58PM
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News Industry Week magazine recently interviewed Blue Ridge Numerics President Ed Williams on the role of CFD in product design. Williams stated that the company was founded to demonstrate that CFD should be used by product designers and that a primary goal of their CFdesign CFD package is ease of use, so that CFD can be incorporated into the design process.
Just hearing the words 'computational fluid dynamics' is usually enough to send shudders down the spines of most product-development engineers. The mention of CFD still tends to conjure up images of stern-looking men in white lab coats conducting experiments in NASA test cells.
The full text of the interview is available at the CFdesign web site.

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CFD Best Practice Guidelines
Posted Thu December 13, 2001 @03:22PM
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News The European Research Community On Flow, Turbulence And Combustion (ERCOFTAC) has commissioned a Best Practice Guidelines (BPG) document for computational fluid dynamics. The document is available through the ERCOFTAC web site and addresses mesh design, boundary conditions, sensitivity checks, and the limitations of turbulence models. Advice was sought from leading researchers and commercial code vendors.

The document has seven chapters which address sources of error and provides short simple bullet-point statements of advice following the discussion.

There are also eight example calculations, calculated by the commercial code vendors, which are explained in detail. These test cases range from natural convection in a cavity through to flow in a low speed centrifugal compressor and in an internal combustion engine valve.

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