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Old   January 11, 2008, 12:45
Default Gas dispersion in atmosphere
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Hi I simulate gas dispersion from ground level source to atmosphere. I find good result at height 1.2m at distance 25m from source, but my results at height 0.3m isn't good, really their 4times larger than experimental data,

Do you have any idea? What's this reason? I have 10 inflated layers near ground.


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Old   January 12, 2008, 08:58
Default Re: Gas dispersion in atmosphere
Pratap Kumar DVS
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Can please explain how you done that problem. These results mainly depends on the convergence, mesh quality and turbulence model what you have used for this. I have done one problem on dispersion long back, if you explain with some more data i can help you out.
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Old   January 12, 2008, 12:27
Default Re: Gas dispersion in atmosphere
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I simulate Kit Fox experiment, I have 75 baffles (2.4*2.4), with 6.1m lateral and 8.1m longitude distance, were gas inlet from source 1.5m*1.5 middle of the baffles, from surface (q=3.65kg/s, release time=20s), and wind speed data are z=0.25, 0.5, 1, 2, 4, 8, 16, 24, U=1.68, 1.896538, 2.204615, 2.61, 3.028077, 3.573077, 4.385, 5.089615, respectivly

Surface roughness is 0.01m.

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