网格密度对海底管道溢油扩散数模结果的影响

发布时间：2018-05-05 09:54

本文选题：海底管道溢油 + 疏、密网格模型　；参考：《天津大学学报(自然科学与工程技术版)》2016年09期

【摘要】：采用数学模型对海底管道溢油扩散进行模拟时,除了要求模拟结果的准确,同时也必须要从经济性角度考虑计算成本的问题.为筛选出合适的数值模型,对不同网格模型进行了对比性研究.基于结构网格,采用有限体积法建立溢油扩散模型,并采用流体体积法来追踪多相流界面.选用疏、密两种不同网格进行计算.根据Fan(1967)经典实验,选择3种不同工况,并采用其实验数据对计算结果进行验证对比.通过不同工况下疏、密网格模型中溢油的传播形态、到达海面时间、横向漂移距离、海面扩散范围及电脑计算时间的对比分析,研究了网格疏密对溢油结果的影响.研究表明:密网格模型电脑计算时间过长,各种物理量的提升效率一般,而疏网格模型计算成本则较为合适.该模型可为海管溢油扩散预测及应急维修提供参考.
[Abstract]:When using mathematical model to simulate oil spill diffusion of submarine pipeline, it is necessary to consider the problem of calculating cost from the point of view of economy, in addition to the accuracy of simulation results. In order to select suitable numerical models, the comparative study of different mesh models was carried out. Based on the structural grid, the finite volume method is used to establish the oil spill diffusion model, and the fluid volume method is used to track the multi-phase flow interface. Two different meshes are chosen to calculate. According to Fanli 1967) classic experiment, three different working conditions are selected, and the calculated results are verified and compared with the experimental data. The effects of grid density on the oil spill results were studied through the comparative analysis of the oil spill propagation pattern, the arrival time, the transverse drift distance, the sea surface diffusion range and the computer computing time in the dense grid model under different working conditions. The results show that the computing time of the dense grid model is too long and the efficiency of various physical quantities is general, while the cost of the sparse grid model is more suitable. The model can be used as a reference for prediction of oil spill diffusion and emergency maintenance.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;海洋石油工程股份有限公司;中海油研究总院;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2014CB046804) 工信部海洋工程装备科研资助项目(E-0815C003) 国家自然科学重点基金资助项目(51239008) 中国博士后科学基金资助项目(2015M580203)
【分类号】：X55;X741

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