LSMS (Liquid Spill Modelling System) is a tool for calculating
the spreading and vaporisation of a liquid pool. Liquids such as
liquefied natural gas (LNG), liquefied petroleum gas (LPG) and
others are routinely stored at low temperatures and on their
release to the atmosphere they boil or evaporate depending on
their temperature relative to the ambient air. Such liquids flow
across the ground or other substrate surrounding the containing
vessel, extracting heat from the underlying surface which
provides the energy to drive the vaporisation. As the liquid
spreads, the size of the liquid pool changes and the
vaporisation rate alters accordingly and such information is
essential for calculating the subsequent dispersion of the cold
vapour. In many circumstances the containing vessel is
surrounded by some mitigating measure such as the presence of a
bund and the flow of the liquid and its interaction with the
bund wall presents a formidable prediction problem. LSMS
development was sponsored by BG, Gaz de France,