A calculation methodology has been developed to simulate cryogenic liquid spilling from various tanks

pool spreading and mass transfer on water.The shallow water differential equations have been used to illustrate the spreading process in this methodology.Not only the maximum radius and life of the pool can be calculated

but also the height profile of the pool is able to be presented.This methodology has been applied to simulating 12500 m3 LNG(liquefied natural gas)spreading on water which were supposed to be released from breach holes on various tanks.The simulation results have been analyzed in three aspects.First

breach diameters show a Boltzmann nonlinear relation with pool radius.Second

through researching the pool shape and tank configuration

it is found that it is adoptable to substitute cubic tank for spherical tank and substitute semicircle pool for shape-changing pool for the scenario modeled in this article.Finally

the contrastive analysis between this model and the Federal Energy Regulatory Commission(FERC)model which is based on depth-averaged integral equations reveals that the averaged depth leads to a larger pool radius.