针对液化天然气水面泄漏蒸发产生的低温天然气扩散问题，基于Monin-Obukhov相似理论，使用FLUENT软件，模拟Coyote系列实验3、5.计算结果与实验结果、SLAB和DEGADIS模型模拟结果比较表明，使用FLUENT软件模拟结果更接近实验数值.同时，通过设定FLUENT软件中壁面的热传导速率和液化天然气的蒸发速率，模拟液化天然气在水面和地面泄漏和扩散过程，结果表明，液化天然气水面泄漏扩散时水面最大体积分数高于地面泄漏扩散情况.

Aiming at liquefied natural gas (LNG) spilling on water and evaporating natural gas dispersion, the FLUENT is used to simulate the Coyote series 3 and 5 based on the Monin-Obukhov theory. Comparison results show that FLUENT simulation results are closer to experimental values than SLAB and DEGADIS results. While the process of NG dispersing on water is simulated by setting higher wall heat conduction rate, and LNG spilling on ground is simulated by using lower LNG evaporation rate. Results show that LNG spilling and dispersion on water can get higher volume concentration than which occurs on ground.