Abstract Accidental spills of cryogenic liquids create vaporizing pools spreading over the ground that can result in pool fires, explosions, or hazardous vapor clouds. Various integral models have been developed for simulating the spread and vaporization of cryogenic liquid pools. The spreading law of a constant Froude number (CFN 1 ), which was originally derived for floating pools on water, has been assumed to be accurate for pools spreading on land in some models. This assumption is controversial and has not been validated. In addition, although the gas accumulation over spreading pools (GASP 2 ) model has been well developed, further validation is required. An attempt was made to fill these gaps. This study aimed to propose and validate numerical models, i.e., a model incorporating the spreading law of a constant Froude number (CFN model) and simplified GASP models for indoor spills. The results were compared to the experimental data of cryogenic liquid pools spreading on solid ground. A good agreement between the predictions obtained from the simplified GASP models and the measured data was shown. Conversely, the CFN model yielded unrealistic results. Then, a modified CFN model was proposed and validated. The validations suggested that the modified CFN and simplified GASP models successfully simulated the behavior of cryogenic liquid pools spreading on solid ground.

中文翻译：

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固体地面低温液体池扩散和汽化数值模型的验证

摘要 低温液体的意外溢出会形成散布在地面上的蒸发池，从而导致池火灾、爆炸或危险的蒸气云。已经开发了各种积分模型来模拟低温液体池的扩散和蒸发。恒定弗劳德数 (CFN 1 ) 的扩散定律最初是为水上漂浮池推导出来的，但在某些模型中，已假定对于陆地上的水池扩散是准确的。这个假设是有争议的，并没有得到证实。此外，虽然扩散池上的天然气聚集（GASP 2 ）模型已经得到很好的发展，但还需要进一步的验证。已尝试填补这些空白。本研究旨在提出和验证数值模型，即，一个模型结合了恒定弗劳德数的传播规律（CFN 模型）和室内泄漏的简化 GASP 模型。结果与在固体地面上铺展的低温液体池的实验数据进行了比较。显示了从简化的 GASP 模型获得的预测与测量数据之间的良好一致性。相反，CFN 模型产生了不切实际的结果。然后，提出并验证了改进的CFN模型。验证表明，修改后的 CFN 和简化的 GASP 模型成功地模拟了低温液体池在固体地面上扩散的行为。显示了从简化的 GASP 模型获得的预测与测量数据之间的良好一致性。相反，CFN 模型产生了不切实际的结果。然后，提出并验证了改进的CFN模型。验证表明，修改后的 CFN 和简化的 GASP 模型成功地模拟了低温液体池在固体地面上扩散的行为。显示了从简化的 GASP 模型获得的预测与测量数据之间的良好一致性。相反，CFN 模型产生了不切实际的结果。然后，提出并验证了改进的CFN模型。验证表明，修改后的 CFN 和简化的 GASP 模型成功地模拟了低温液体池在固体地面上扩散的行为。