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Old   January 25, 2005, 13:08
Default Explosion simulation in CFX 5
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Jens
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Hi

Anyone work is working with explosion simulation in CFX 5.7.

I would like to discuss some ideas and results.

Kind Regards

Jens
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Old   January 26, 2005, 09:54
Default Re: Explosion simulation in CFX 5
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funster
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More to the point has annyone ever tried this other than using CFX4 ? What are the long term plans for AutoReagas ?
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Old   January 27, 2005, 03:33
Default Re: Explosion simulation in CFX 5
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Jens
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Hi,

Yes, CFX 5 has been used in an EU project call EXPRO, where DDT scenarios using Hydrogen has been investigated. However we try to use similar approach as in EXPRO project but for Methan-Air mixture.

But we are having a few problems with the generation of the pressure wave.

Regards

Jens
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Old   January 27, 2005, 13:50
Default Re: Explosion simulation in CFX 5
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funster
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Is there any info on the web about this Jens ? I've not herd of the EXPRO Project.
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Old   January 27, 2005, 15:15
Default Re: Explosion simulation in CFX 5
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Jens
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Hi

Yes there are a lot of paper from this project.

That a look at:

http://batchelor.uc3m.es/expro/expro.html

Have you attempted explosion simulation in CFX ?

Regards

Jens
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Old   January 31, 2005, 12:13
Default Re: Explosion simulation in CFX 5
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funster
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Had a colleague who tried this many years ago in CFX4.

Used the example of the advancing flame front throught the baffled tube as a starting point. I believe there are CFX papers on this. But as for trying this in the latest version of the code - no I haven't tried it. Interesting proiblem - how to accomodate all the turbulence effects. What are you looking to model ?
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Old   January 31, 2005, 15:34
Default Re: Explosion simulation in CFX 5
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Jens
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Hi,

Sofar I am using a rather simpel channel with different set of baffel arrangement.

Yes I know the CFX papers on this, there is also a report from about 10 years ago. (NB: are you inhouse?)

The model I use are both eddy break-up and the turbulence flame closure model combined with the DES turbulence model.

Sofar I have been working about 4-6 weeks with the simulation of explosions and have reached a break point now, I think.

However the simulation are rather time consumning compared to special explosion codes like Exsim or AutoReagas.

Reagards

Jensn
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