海底管道水下气体扩散FLUENT仿真分析

Analysis of Underwater Gas Diffusion from Piping Based on FLUENT

海底管道气体扩散到自由表面的半径及泉涌高度是进行水下气体泄漏风险分析的关键因素。利用FLUENT软件中的VOF模型和DPM模型耦合方式,对海底管道气体竖向扩散进行了仿真。模拟了水气两相交界面的行为,研究了气泡粒子扩散过程,分析了气泡粒子的扩散半径及轴向位移,讨论了不同泄漏速率对水下气体上升时间及水气两相交界面中泉涌高度的影响。通过模型中的水气两相交界面中泉涌高度和上升时间与实验结果的比较,验证了模型在一定条件下的正确性。

Diffusion radius and fountain height are necessary for the risk analysis of underwater gas diffusion. The method, coupled with the VOF model and DPM model in FLUENT, was taken to simulate the underwater gas diffusion, which is leaked from piping in the vertical direction. The behavior of the interface between water phase and air phase was simulated, the bubble particles diffusion process was researched and the diffusion radius and axial displacement were analyzed. The effects on the rising time and fountain height from different flow rates were discussed. Compared to the experiment data of rising time and fountain height, the method is correct in some condition.