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What sort of dispersion model is used to calculate the dimensions of a flammable cloud of methane?

April 26, 2017CALCULATE Cloud dimensions dispersion flammable methane model sort Used

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What sort of dispersion model is used to calculate the dimensions of a flammable cloud of methane?

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Since the molecular weight of methane is much less than that of air, low pressure ambient temperature releases are buoyant. This means the gas rises as it spreads away from the source and the rate of mixing with air is enhanced by the upward motion. Ground level concentrations are smaller than those predicted by a passive dispersion model, therefore any consequence analysis based on the assumption that low pressure methane releases disperse passively is likely to be pessimistic.