SPH-EBG方法模拟研究柔性拦油栅拦截漏油过程  

SPH-EBG simulation of oil spill containment by a flexible boom

作　　者：裴志博 李欢 杨秀峰 Zhibo Pei;Huan Li;Xiufeng Yang(School of Aerospace Engineering,Beijing Institute of Technology,Beijing,100081,China)

机构地区：[1]School of Aerospace Engineering,Beijing Institute of Technology,Beijing,100081,China

出　　处：《Acta Mechanica Sinica》2023年第2期86-96,共11页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12172049 and 12032005).

摘　　要：拦油栅通常用于拦截泄漏在水面上的浮油,防止浮油扩散到更广阔的区域.柔性拦油栅拦截漏油的过程涉及复杂的流体力学问题,例如自由表面流、多相流和流固耦合等.本文在光滑粒子法(smoothed particle hydrodynamics,SPH)和单元弯曲组方法(element bending group,EBG)耦合方法的基础上进行了改进,用于模拟研究柔性拦油栅拦截水面浮油的过程.SPH方法用于模拟拦油栅的刚体浮子和油-水两相流,EBG方法用于模拟拦油栅的柔性裙栅.文中采用了粒子迁移技术改善粒子位置的分布.通过与实验对比,验证了SPH-EBG方法的适用性和准确性.然后,通过一系列数值模拟研究了柔性拦油栅拦油的机理以及裙栅长度、配重、水流速度和初始油量等典型参数的影响.Oil booms are commonly used to concentrate oil spilled in water and prevent oil from spreading to more expansive areas.The containment of an oil spill by a flexible boom involves complex problems such as the free surface flow,multiphase flow,and fluid-structure interaction.This paper presents a coupled numerical method of smoothed particle hydrodynamics(SPH)and element bending group(EBG)to study oil spill containment by a flexible boom.The SPH method is used to simulate the oil-water two-phase flow and rigid floater of the boom,while the EBG method is used to model the flexible skirt of the boom.The particle shifting technique is adopted to improve the particle distribution.The SPH-EBG method was validated against experiments.Then,a series of numerical simulations was performed to study the mechanism of oil containment by a flexible boom and the effects of typical parameters such as the skirt length,counter weight,current velocity,and initial oil volume.

关 键 词：SPH-EBG Coupling method Oil spill Flexible boom Multiphaseflow 

分 类 号：X550.5[环境科学与工程—环境工程]