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New Software: New CAD Integrated CFD Code
Posted Thu August 21, 2003 @08:24AM
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News The CD adapco Group, global provider of CAE software solutions and services, announces the release of Comet-Design.

Comet-Design is a new CAD integrated CFD (Computational Fluid Dynamics) tool for design engineers. It has been developed in response to the increasing demand for associativity of analysis tools with downstream CAD/CAM processes. It is a stand-alone package with a solid modeler, automatic mesher, solver and visualizer all included.

A unique feature is that the computational meshes are formed from polyhedral cells, allowing the solver, Comet, to achieve faster and more accurate solutions than conventional CFD codes. It has the ability to handle applications involving complex incompressible/compressible, laminar/turbulent and industrial flows, as well as heat transfer. The advantage of the polyhedral approach is that it combines the benefits linked to both tetrahedral and hexahedral meshes, i.e. quick and robust automatic mesh generation and quick, robust and accurate CFD solutions.

( Read Full Article | New Software )

Application: Preserving the Domus Aurea with CFD
Posted Mon August 18, 2003 @01:21PM
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Application The Domus Aurea was built in Rome by Emperor Nero in 64 AD. Known as The Golden House, the Domus Aurea was richly decorated with frescoes and precious stuccoes and covered in pure gold, representing imperial Roman architecture at its finest. Following Nero’s fall in 68 AD, the Domus Aurea was completely buried under Emperor Trajan’s baths. The Golden House remained underground for centuries and has only been partially opened to visitors since 1999.

Throughout Rome’s colorful history, The Domus Aurea has survived as one of the world’s most architecturally complex hypogean (underground) structures. However, after one thousand nine hundred and thirty nine years, the elements have taken their toll on this national treasure. Adversely affected by the microclimatic conditions inside the Golden House, the rich frescoes have started to decay.

( Read Full Article | Application )

Events: PHOENICS CFD Software Application and Training Programs Scheduled for India
Posted Mon August 18, 2003 @11:24AM
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News C-DAC, Pune (India) is organising a seminar on "Industrial application of CFD simulation" on Oct 14, 2003. Dr. Jeremy Wu from CHAM, UK will be available for interaction with Industries, Academia and Scientists. There is no registration fee for the seminar.

C-DAC, Pune(India), is organising a "Training Programme on PHOENICS CFD Software" during Oct 15 -17, 2003. The training will be imparted by Dr. Jeremy Wu from CHAM, UK.

C-DAC, Pune(India), is also organising "PHOENICS User Discussions" on Oct 18, 2003. Dr. Jeremy Wu from CHAM, UK will interact with users.

For registration, please contact( Vikas Kumar,
Scientific, Engineering & Computing Group,
Centre for Development of Advanced Computing(C-DAC),
CFD, NPSF Building,
Ganeshkhind, Pune University Campus,
Pune: 411 007, INDIA,
Phone: +91(020)5694000/1/2/3 Extn 504, 5694080
Fax Number:+91(020)569 4081

( Post Comment | Events )

Application: New Developments in CFD Extend Application to Pelton Turbines
Posted Fri August 15, 2003 @01:27PM
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Application By Etienne Parkinson

Thanks to developments in simulation methods over the last twenty years, the optimization of the hydraulic design of reaction-type water turbines (Francis and Kaplan turbines) is now primarily carried out by means of numerical flow simulation. In the design process, numerical flow simulation provides the engineer with a rapid and reliable tool to obtain a better understanding of the flow and to quickly examine various design options in order to select the optimum configuration.

A similar move towards the use of simulation methods is now taking place in the field of Pelton turbines. Until now, the flow in Pelton turbines has not been analyzed in such detail as the flow in Francis and Kaplan turbines. One of the reasons for this is that the flow patterns and the hydraulic losses are very difficult to observe and quantify by experiments. This is due to the very complex flow processes that occur in Pelton turbines, which include pressure losses, secondary flows, jets, film flow, free surfaces, spray formation, ventilation losses, unsteadiness, and complex interaction between the components.

( Read Full Article | Application )

Grid Generation Help Requested
Posted Thu August 14, 2003 @08:26AM
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Help Desk Vijendra Singh Chauhan

I want help for generating a grid for a rotating rotor of an axial flow turbine. Rotor has 6 untwisted straight blades. I am using GAMBIT application. I do not find any tutorial relevant to my geometry. Please if anybody can give me a link.

( Post Comment )

Application: CFD Helps Engineers Improve Ferrari Formula One Aerodynamics
Posted Wed August 13, 2003 @10:22AM
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Application By Francis T. Makowski
Fluent Inc.
Lebanon, NH

Computer simulation has helped engineers at Ferrari make significant improvements to the aerodynamics of a Formula One vehicle. The simulation was used to fine-tune the aerodynamics of a new roll-hoop structure required by a recent rule changes. Because of the compressed design cycles required in Formula One racing, there wouldn’t have been time to evaluate alternatives if wind tunnel testing had been the primary design tool. Instead, engineers used computational fluid dynamics (CFD) to model the configuration of the upper rear bodywork and optimize its design. In order to minimize simulation time, a reduced-domain simulation was performed in the vicinity of the new structure, with the conditions on the boundaries of the domain coming from an existing CFD model. During the CFD analysis, several sophisticated modeling methods were used to ensure an accurate solution, including the Reynolds Stress Model (RSM) and non-equilibrium wall functions for the turbulent flow. Subsequent air tunnel testing revealed that panels whose design was based on the simulation met the design objectives; they were essentially invisible aerodynamically.

In 2001, the body governing Formula 1 racing required that, for safety reasons, the roll hoop structure be capable of supporting higher vertical and lateral loads. This requirement forced all F1 teams to revise their chassis structures and bodywork in the vicinity of the inlet to the airbox snorkel. It ultimately became necessary for each team to re-optimize aerodynamically all of the upper surfaces of the car aft of the cockpit.

( Read Full Article | Application )

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