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Application: Riding on Air with CFX Simulation
Posted Fri September 16, 2005 @02:46PM
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Application By John Purnell
Senior Engineer
CDI Marine Systems Development Division

CDI Marine Systems Development Division (CDIMSDD, formerly Band, Lavis, & Associates, Inc.) used computer simulation to design the lift fans and propellers for a proposed large air cushion vehicle (ACV) in a fraction of the time that would have been possible using prior conventional methods. The proposed ACV will be used in transporting cargo and passengers, and is designed to carry twice the payload of the present craft. CDIM-SDD was assigned the task of designing new propellers capable of delivering about twice the power of the present propulsion system. There was also a requirement to design new lift-air supply fans capable of developing additional pressure and flow to support twice the payload.

( Read Full Article | Application )


Help With Fluidized Bed Simulation
Posted Wed September 14, 2005 @08:09AM
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Help Desk Monty writes "Hi Friends,

This is Monty. I am doing thesis in Fluidization Engineering. I am simulating fluidizied bed having air as continous phase and glass beads as dispersed phase. I want to use Eulerian multiphase approach. I am using Star-CD. In most of the other research papers, Drag coefficient and Restitution coefficient have been mentioned in the formulation for simulation. If someone could tell me where exactly, I need to put these 2 coefficients and where do I mention the percentage of dispersed phase present in the fluidizied bed.

Thanking you."

( Post Comment )


New Software: Flownex 6.8 Improves Performance
Posted Mon September 12, 2005 @09:35AM
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Announcements Flownex version 6.8 incorporates several enhancements to the solver for faster and more stable network solutions. Furthermore, a new interpolation routine for coping with interpolation between different speed-lines (with vastly different spreads of mass flow points) on the compressor / turbine charts was implemented.

Several enhancements were also implemented for the Flownex graphical user interface to make Flownex even easier to use.

( Post Comment | New Software )


Events: CD-adapco Hosts Online Seminar on Polyhedral Meshing Technology
Posted Fri September 09, 2005 @03:22PM
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CD-adapco CD-adapco will host a free online seminar: Revolutionary Polyhedral Meshing Technology.

Europe
September 19, 2005 at 10:00am BST
North America
September 26, 2005 at 12:00pm EDT

CD-adapco hosts the second in their series of free online webinars; this time featuring their revolutionary Polyhedral meshing technology. As well as describing the benefits of polyhedral meshes over traditional topologies, the webinar will demonstrate how polyhedral meshes can be automatically generated and will discuss some of the theory behind them.

( Read Full Article | Events )


WilliamsF1 Selects Fluent After Benchmark Tests
Posted Fri September 09, 2005 @03:14PM
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ANSYS FLUENT WilliamsF1, a leading Formula 1 team has signed a new deal with Fluent Europe Ltd. to use its world-leading CFD software and services after Fluent won a series of rigorous benchmarking tests. Running from 2005, the agreement will see WilliamsF1 work exclusively with Fluent for an initial three-year period, with an agreement for a further 2 years, assuming Fluent continues to maintain its position as the most advanced CFD software in the world.

Fluent has a long history of success in F1. Eight of the last 10 Formula 1 championship winning teams used Fluent’s CFD software. WilliamsF1 won two of its sixteen World Championships in 1996 and 1997 using FLUENT CFD, but an unbroken partnership between the two has existed dating back to the early 1990s.

( Read Full Article )


Help in Obtaining Fully Developed Laminar Flow Velocity Profile
Posted Thu September 08, 2005 @10:16AM
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Help Desk dhananjay writes "Hellow CFD Forum Members,

I am Dhananjay working on Fluid Flow and Heat Transfer Analysis. I tried to find out the fully developed velocity profile for Laminar Flow in a circular cylindrical geometry using STAR-CD version 3.24, which logically should be Parabolic and centre-line velocity in axial direction should be 2 times that of inlet average velocity. I tried with different types meshes viz. Tetrahedral, Hybrid and trimmed. However, I could not get the result. Then I tried to increase the Extrusion layer thickness in radial direction as much as possible. I could see the effect of developing profile and increase in the max centre-line velocity by 1.8 times that of inlet. However, I could not get the result closer to analytical result, by extreme refining of the meshes too. The modelling and grid generation is also checked.What can be the probable reason for this? What is the extrusion layer and its effect?

Please, help me to obtain the result for validation.

Best Regards.
Dhananjay"

( Post Comment )


 
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