| 朱亮， 王企鲲， 钱佳杰， 薛壮壮.方管中颗粒随黏弹性流体迁移的力学特性[J].轻工机械,2019,37(5):39-44 |
| 方管中颗粒随黏弹性流体迁移的力学特性 |
| Mechanical Characteristics of Particle Migration with Viscoelastic Fluid in Square Tube |
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| DOI：10.3969/j.issn.1005 2895.2019.05.008 |
| 中文关键词: 颗粒迁移 黏弹性流体 Giesekus模型 相对运动模型 横向升力 |
| 英文关键词:Mechanical Characteristics of Particle Migration with Viscoelastic Fluid in Square Tube |
| 基金项目:国家自然科学基金(51776128)；国家教育部博士点基金资助项目(201113120120003)。 |
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| 中文摘要: |
| 为研究黏弹性流体中颗粒迁移的力学成因，对方管Poiseuille流动中悬浮颗粒的迁移进行数值研究。选用Giesekus模型的黏弹性流体和球形刚性颗粒作为研究对象，忽略流体的惯性效应以研究流体弹性效应和剪切变稀效应对颗粒受力的影响。控制方程采用有限元法和伽辽金 最小二乘法(GLS)方法进行求解，并取得了较好的收敛性。颗粒运动模型采用基于“相对运动模型的准定常算法”，对通道中颗粒的横向升力的分布特征进行研究。研究结果表明：颗粒在不同横向位置上所受的横向升力决定了颗粒在实际流动中的迁移方向，且受到流体弹性和剪切变稀的影响。 |
| 英文摘要: |
| In order to study the mechanics of particle migration in viscoelastic fluid, the migration of suspended particles at Poiseuille flow in square tube was numerically studied. Giesekus viscoelastic fluid and spherical rigid particles were selected as the research objects. The inertia effect of fluid was neglected to study the effects of fluid elasticity and shear thinning on the force of particles. The governing equation was solved by finite element method and Galerkin least squares method (GLS), and good convergence was obtained. The quasi steady algorithm based on the relative motion model was used to study the distribution characteristics of the lateral lift force of particles in the channel. The results show that the transverse lift of particles at different transverse positions determines the migration direction of particles in actual flow, and is affected by hydroelasticity and shear thinning. |
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