Effects of abrupt expansion geometries on flow-induced fiber orientation and concentration distributions in slit channel flows of fiber suspensions

2005 ◽  
Vol 26 (5) ◽  
pp. 660-670 ◽  
Author(s):  
Kazunori Yasuda ◽  
Satoshi Henmi ◽  
Noriyasu Mori
Keyword(s):  
Fiber Orientation ◽  
Channel Flows ◽  
Fiber Suspensions ◽  
Slit Channel

scholarly journals One-way coupling of fiber suspensions through a rotating curved expansion duct

2012 ◽  
Vol 16 (5) ◽  
pp. 1405-1409
Author(s):  
Qi-Hua Zhang ◽  
Fei Tian ◽  
Wei-Dong Shi ◽  
Hua Zhang ◽  
Xiong-Fa Gao
Keyword(s):  
Numerical Method ◽  
Flow Structure ◽  
Fiber Orientation ◽  
Pressure Rise ◽  
Initial Orientation ◽  
Fiber Suspensions ◽  
Inlet Velocity ◽  
The One

A numerical method based on the one-way coupling using the Jeffery equation is presented. The influence of the inlet velocity and the initial orientation on the evolution of fiber orientation is investigated. It is observed that the rotation mainly contributes to the pressure rise, and the flow structure is not obviously altered. Due to the one-way coupling, the effects of the inlet velocity and the rotating rate are insignificant.

Microstructures of fiber suspensions in complex geometry

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Chunlei Ruan ◽  
Jie Ouyang
Keyword(s):  
Fiber Orientation ◽  
Molecular Conformation ◽  
Complex Geometry ◽  
Fluid Model ◽  
Transversely Isotropic ◽  
Fiber Suspensions ◽  
Conformation Tensor ◽  
Planar Contraction ◽  
Volume Method ◽  
Nonlinear Elastic

AbstractEvolutions of molecular conformation and fiber orientation in fiber suspensions are investigated by collocated finite volume method on unstructured triangular meshes. FENE-P (Finite Extensible Nonlinear Elastic Dumbbell model with Peterlin’s approximation) model which is microstructure-based is chosen to describe the polymeric matrix and TIF (transversely isotropic fluid) model is used to calculate the fiber contribution in order to realize the coupling of flow and fiber orientation. Microstructures of molecule and fiber are obtained by analyzing the information of molecular conformation tensor and second-order fiber orientation tensor respectively. Two numerical examples are considered, namely, a planar contraction flow and a planar flow past a confined cylinder. Present results are hoping to give more insight into the microscopic details of complex flows and thus be more helpful for industrial application.

scholarly journals One and two-fiber orientation kinetic theories of fiber suspensions

2013 ◽  
Vol 200 ◽  
pp. 17-33 ◽  
Author(s):  
Miroslav Grmela ◽  
Amine Ammar ◽  
Francisco Chinesta
Keyword(s):  
Fiber Orientation ◽  
Fiber Suspensions

Orientation Distribution of Fiber Suspensions in Extensional Flow

2013 ◽  
Vol 785-786 ◽  
pp. 981-984 ◽  
Author(s):  
Zan Huang ◽  
Jin Ping Qu ◽  
Ji Wei Geng ◽  
Shu Feng Zhai ◽  
Shi Kui Jia
Keyword(s):  
Differential Equation ◽  
Distribution Function ◽  
Orientation Distribution Function ◽  
Fiber Orientation ◽  
Extensional Flow ◽  
Three Dimensional ◽  
Orientation Distribution ◽  
Fiber Suspensions ◽  
Short Fibers ◽  
Fiber Orientation Distribution

An orientation distribution function is adopted to describe three-dimensional orientation distribution of short fibers suspensions in extensional flow. A mathematical model of evolution process on fiber orientation distribution function is established by analytical method. Numerical simulation is also used to describe two and three dimensional orientation distribution of fibers. Therefore, analytical solution of differential equation on forecast fiber orientation distribution is deduced.

Prediction of fiber orientation in the injection molding of long fiber suspensions

2012 ◽  
Vol 33 (8) ◽  
pp. 1360-1367 ◽  
Author(s):  
Kevin Ortman ◽  
Donald Baird ◽  
Peter Wapperom ◽  
Alex Aning
Keyword(s):  
Injection Molding ◽  
Fiber Orientation ◽  
Fiber Suspensions
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