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方形粒子在Oldroyd-B流体中的沉降特性 被引量:3

Sedimentation of rectangular particle in Oldroyd-B fluid
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摘要 为研究方形粒子在黏弹性流体中的沉降特性,应用基于分布式拉格朗日乘子的虚拟区域方法对方形粒子在Oldroyd-B流体中的沉降运动进行了数值模拟.通过模拟得到了不同长宽比粒子的沉降轨迹、取向角和沉降速度的变化情况,并讨论了不同形状粒子的沉降特性.当方形粒子在Oldroyd-B流体中沉降时,粒子的平衡取向为长边与重力方向平行,平衡位置为方槽的中心线.粒子的长宽比对沉降过程的影响较大,长宽比大的粒子在沉降过程中具有较大的横向漂移和沉降速度.当水力直径相同时,圆形粒子具有最大的沉降速度,而正方形粒子的沉降速度最小. The sedimentation of a rectangular particle in a two-dimensional channel filled with an Oldroyd-B fluid was simulated by using distributed Lagrange multiplier/fictitious domain method in order to investigate the settling characteristics of rectangular particle in a viscoelastic fluid.The sedimenting trajectory, velocity and orientation of particles with different aspect ratio were obtained,and the effect of particle s shape on the sedimenting velocity was also discussed.Results show that the stable orientat...
出处 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2007年第11期1941-1944,共4页 Journal of Zhejiang University:Engineering Science
基金 国家自然科学基金资助项目(10472104)
关键词 方形粒子 Oldroyd-B流体 沉降 拉格朗日乘子/虚拟区域方法 rectangular particle Oldroyd-B fluid sedimentation Lagrange multiplier/fictitious domain method
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  • 1Cox R G, 1970. Long slender bodies in a viscous fluid [J]. J Fluid Mech, 44: 792-821. 被引量:1
  • 2Heiss J F, Coull J, 1952. The effect of orientation and shape on the settling velocity of non-isometric particles in a viscous medium[J]. Chem Eng Prog, 48 : 133--140. 被引量:1
  • 3Herzhaft B, Guazzeni E, Michael B M et al., 1996. Experimental investigation of the sedimentation of a dilute fiber suspension[J]. Phys Review Letters, 77: 290-293. 被引量:1
  • 4Koch D L, Shaqfeh E S G, 1989. The instability of suspension of sedimenting spheroids[J]. J Fluid Mech, 209: 521-542. 被引量:1
  • 5Loewenberg M, 1993. Stokes resistance, added mass, and Basset force for arbitrarily oriented, finite-length cylinders[J]. Phys Fluids, 5: 765-767. 被引量:1
  • 6Mackaplow M B, Shaqfeh E S G, 1998. A numerical study of the sedimentation of fiber suspensions[J]. J Fluid Mech, 376: 149-182. 被引量:1
  • 7Pozrikidis C, 1989. A singularity method for unsteady linearized flow[J]. Phys Fluids, AI (9) : 1508-1512. 被引量:1
  • 8Turney M A, Cheung M K, McCarthy M et al., 1995. Hindered settling of rod-like particles measured with magnetic resonance imaging[J]. AICHE J, 41 : 251-257. 被引量:1
  • 9White F M, 1974. Viscous fluid flow[M]. McGraw-Hin Book Company. 被引量:1

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