Modeling of pool spreading of LNG on land

• Source term model for spreading of LNG on unconfined land is presented.
• The model accounts for composition changes of a mixture.
• The model accounts for the effect of boiling regime on conductive heat transfer.
• Examples are given for continuous and instantaneous spills.
• Sensitivity analysis is conducted for the key parameters of the model.

This paper presents a source term model for estimating the rate of spreading of LNG and other cryogenic mixtures on unconfined land. The model takes into account the composition changes of a boiling mixture, the varying thermodynamic properties due to preferential boiling within the mixture and the effect of the various boiling regimes on conductive heat transfer. A sensitivity analysis is conducted to determine the relative effect of each of these phenomena on pool spread. The model is applied to continuous and instantaneous spills. The model is compared to literature experimental data on cryogenic pool spreading.