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Application: CFD at Opel
Posted Thu November 15, 2001 @07:09PM
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Application CFD engineers at Opel have streamlined the simulation process for vehicle external aerodynamics. Their aim is to produce high-accuracy CFD predictions in the shortest turn-around time.

Opel utilizes a CAE database which allows the engineers to quickly extract components, such as the base chassis, external mirrors, and spoilers, and combine them into a CAD model. The pre-processing software ANSA is then used to produce a triangular surface mesh. Generation of the volume mesh is done using a variety of tools including Fluent's TGrid and GAMBIT mesh generators. Prism layers are utilized to provide good resolution of the viscous boundary layer and the remaining volume is filled with tetrahedra. Non-conformal interfaces are used to handle difficult geometry such as external mirrors, underbody, and side window steps.

( Read Full Article )

We've Got CFD Jobs!
Posted Thu November 15, 2001 @03:23PM
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CFD Review After a while in development, we are proud to announce the debut of the CFD Review Jobs Database!

The Jobs Database is an online meeting place for employers and recruits in the CFD field. Employers can post job openings and receive applications directly through CFD Review. Employers can even be notified via email of each new applicant. People looking for work can post their resume online and apply for jobs using the tools on the site.

Check out the Jobs Database now, and be sure to read the Employer FAQ and For Hire FAQ for answers to frequently asked questions.

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FEATURE: CFD Modeling of an Internal Rotary Pump
Posted Wed November 14, 2001 @06:18PM
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Application Rob Broberg of AEA Technology has provided us with his analysis of an internal rotary pump (a type of gear pump).
The pump studied is an example of a special class of internal rotary pump which utilizes cycloidal gear profiles. This means that the gear profile is generated by rolling, without slippage, a circle around a larger fixed circle. Usually the outer gear, or trochoid, is generated in this fashion and the inner gear is the conjugate shape to the outer gear. This leads to the term generated-rotor or gerotor pump.
This analysis is quite advanced in that it is transient and involves moving mesh. The article includes a number of animated images which serve to greatly enhance understanding of the flow field.

You can find this article, and more, in the features section.

( Post Comment )

CFD in France
Posted Tue November 13, 2001 @11:20AM
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News Anonymous writes "pretty good sites:"

I agree. CERFACS is an international research association which specializes in numerical models, SIMULOG provides a number of software packages including an excellent tetrahedral mesher, OPTIFLOW is a provider of CFD consulting services.

( Post Comment )

Application: Using CFD to Optimize APU Design
Posted Tue November 06, 2001 @03:32PM
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Application Hamilton Sundstrand Power Systems has used CFD to optimize the design of an auxiliary power unit (APU) for the new Embraer ERJ 170 regional jet.

An APU is a gas turbine used to provide electrical and pneumatic power during ground operations. The unit also acts as a backup supply of electrical power when airborne. The design of the APU for the Embraer jet was more complicated than usual.

"It was a particularly challenging component to design because there were constraints regarding size, drag, and acoustics," says Jose Goldstein, senior engineer at Hamilton Sundstrand Power Systems.

( Read Full Article )

Application: Airplane Winglets Optimized Using CFD
Posted Mon November 05, 2001 @02:59PM
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Application Embraer has utilized CFD in the design of winglets to be added to their popular corporate and regional jet aircraft.

Embraer legacy
The Embraer Legacy executive jet.

A winglet is a wing-like surface attached to the tip of the wing that is used to improve fuel efficiency and climbing capability. It accomplishes this by acting like a small sail with a lift component that generates a traction force, draining energy from the tip vortices. Consequently, it reduces the vortex strength, lowering induced drag.

( Read Full Article )

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