液舱内气-液-固多相流晃荡运动数值模拟
Numerical simulation of sloshing motion in liquid tanks with gas-liquid-solid multiphase flow
卢莉莉 1朱仁庆 1方译彩 2夏志平 1窦朋 1纪仁玮1
作者信息
- 1. 江苏科技大学 船舶与海洋工程学院,江苏 镇江 212100
- 2. 中国石油管道局工程有限公司,河北 廊坊 065000
- 折叠
摘要
应用多相流理论,建立了液舱内气-液-固多相流晃荡运动计算模型.其中气-液两相流体作为连续相,采用欧拉方法描述其运动,应用流体体积(VOF)法捕捉气-液交界面即自由液面运动;固体颗粒处理为离散相,由拉格朗日法描述其运动.应用计算流体力学-离散元(CFD-DEM)耦合方法,数值计算两相流体和固体颗粒的相互耦合运动.以气-水-冰颗粒多相流为例,借助STAR-CCM+软件平台,计算分析了舱内冰颗粒对液舱晃荡特性的影响.首先通过模拟经典案例单个球颗粒从空气落到水中的过程,验证了CFD-DEM方法的有效性.其次,对纯水液舱晃荡进行了数值模拟并与公开试验结果比较,验证了气-液两相流体晃荡数值方法可行性.然后通过对不同体积分数下气-水-冰颗粒多相流晃荡引起的舱壁压强及自由液面运动幅值的比较分析,研究了气-液-固多相流的晃荡特性.计算结果表明,随着冰颗粒体积分数的增加,液面波动幅值随之减小,说明浮动颗粒对液舱晃荡有明显的抑制作用.
Abstract
Employing multiphase flow theory,a computational model for sloshing motion with gas-liquid-solid multiphase flow within liquid tanks was established.In this model,the gas-liquid two-phase flow was treated as continuous phases and described using the Eulerian approach,with the volume of fluid(VOF)method applied to capture the motion of the gas-liquid interface,i.e.,the free surface motion;solid particles were treated as discrete phases and described by the Lagrangian approach.The CFD-DEM coupling method was applied to numerically calculate the coupled motion between two-phase fluids and solid particles.Taking the gas-water-ice multiphase flow as an example,using the STAR-CCM+software platform,the impact of ice particles in the tank on the sloshing characteristics of the liquid tank was analyzed and calculated.Firstly,by simulating the classic case of a single spherical particle falling from air into water,the effectiveness of the CFD-DEM method was verified.Secondly,numerical simulation of pure water tank sloshing was conducted and compared with the results of published experiments to verify the feasibility of the numerical method for gas-liquid two-phase flow sloshing.Then,by comparing and analyzing the pressure on the tank wall and the amplitude of free surface motion induced by sloshing in gas-water-ice multiphase flow under different volume fractions,the sloshing characteristics of gas-liquid-solid multiphase flow were studied.The calculation results indicate that with the increase of the ice particles'volume fraction,the amplitude of fluid surface fluctuation decreases,suggesting that floating particles have a significant damping effect on liquid tank sloshing.
关键词
液舱晃荡/气-液-固多相流/VOF法/CFD-DEM耦合方法/数值模拟Key words
liquid tank sloshing/gas-liquid-solid multiphase flow/VOF method/CFD-DEM coupled method/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据