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Modeling Metal Foam Heat Exchanger
Posted Fri February 17, 2006 @09:13AM
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Help Desk David Dunavant writes "I am wondering if my modeling approach is correct. I have modified thermal conductivity, k, and specific heat, cp, of my fluid based on volume ratios and corresponding properties of metal foam and fluid.

Volumetric flow rate of the fluid is constant. It seems like different pressure drops from different pressure-velocity curves corresponding to different pores per inch (PPI) will not affect thermal performance.

Heat exchange of metal foam is about twice that of conventional baffle-type design. Furthermore pressure drop can be greatly reduced.

Also would appreciate if anyone can provide information about permeability, K, and inertia coefficient, C, of aluminum metal foam since suppliers won't release much information although I do have limited data.

Any assistance is appreciated, thanks.
David Dunavant"

( Post Comment )

Business: ANSYS Buys Fluent!
Posted Thu February 16, 2006 @09:12AM
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News In a letter to Fluent customers from Fluent CEO Bart Patel and President Ferit Boysan, Fluent has announced that ANSYS will aquire Fluent in a cash+stock deal worth $565 million US dollars.

The combination of Fluent's and ANSYS' software products and services is expected to give ANSYS one of the most complete, independent engineering simulation software offerings in the industry, reaffirming and strengthening ANSYS' commitment to open interface and flexible simulation solutions that are primarily driven by customer demand and choice. With over 40 direct sales offices and 17 development centers, on three continents, the combined company will employ approximately 1,350 people.

"We are very excited about the industry leading technologies that Fluent adds to ANSYS' simulation capabilities," said James Cashman, President and CEO of ANSYS. "Both companies have a strong commitment to their customers and employees and share a passion for the development of innovative products and services and a history of world-class execution. This combination will strengthen these values and will allow us to better serve our customers by accelerating delivery of comprehensive, customer-driven engineering simulation solutions and by enabling us to provide high quality support throughout the world."

( Read Full Article | Business )

Application: Reducing Noise Levels in Automotive Steering Systems
Posted Tue February 14, 2006 @12:00PM
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Application By Emilio Paladino, Technical Service Manager, ESSS and
Celso Takemori, Researcher, ESSS and
Leonardo Lessa, Product Engineering Coordinator, DHB Componentes Automotivos

The positive displacement pump used to power hydraulic-assisted steering is one of the main noise sources in an automotive steering system. DHB Componentes Automotivos, a manufacturer of steering systems for automotive and marine applications located in Brazil, is using ANSYS CFX software to analyze and understand the flow behavior within their pumps.

Customers are now looking for cars with very low noise levels. As engines are improved for quiet operation, noise from other areas such as the steering system is becoming more and more apparent. Noise level is now the first requirement analyzed when an automotive manufacturer selects a hydraulic steering system.

( Read Full Article | Application )

Engineering Bugaboo: Software Interoperability
Posted Mon February 13, 2006 @08:48AM
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News Karen Auguston Field from Design News has posted an article on CAD software interoperability stating that most design engineers use 3 or 4 different CAD tools in a given month. Of course CAE users are familiar with this problem with analysis geometry routinely provided in a variety of formats.

A troubling statistic from the survey quoted in the article is that:

the survey revealed low adoption rates of industry standard formats like STEP and IGES. Though these neutral formats were created specifically to facilitate the exchange of disparate CAD models, only 19 percent of the respondents reported using either of them.

As a result, the engineers surveyed had developed their own solutions for dealing with the problem which includes exchanging PDF files and rapid prototypes rather than CAD models.

( Post Comment )

Application: Fast Hex Meshing Compared with Tetrahedral Meshing
Posted Sun February 12, 2006 @06:33PM
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Application The purpose of a recent study performed by DaimlerChrysler was to compare the performance of Harpoon-based CFD against previous solutions of internal flow through an automotive water pump using tetrahedral meshes.

The effect of mesh skew on accuracy and convergence was observed. Fourteen operating speeds were simulated from 1000-7500rpm at 500rpm increments.

( Read Full Article | Application )

New Software: New Generation CFD Software Released
Posted Wed February 08, 2006 @06:19PM
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News Symban Power Systems Ltd has released APUS-CFD1.4, a new generation of CFD software supplied to its customers at a very competitive price.

APUS-CFD is a fully interactive, Arbitrary Polyhedral Unstructured Solver. It provides a complete solution from model-building to automatic mesh generation and from parallel and grid computing to real-time visualization in an integrated and interactive environment. The APUS-CFD solver is robust, fast, scalable and has been validated on a number of industrial applications.

( Read Full Article | New Software )

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    Monday February 06

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  • Monday January 30

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  • Wednesday January 25

  • Fluent Introduces CoolSim Data Center Environment Thermal Audit Solution (0)
  • Tuesday January 24

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