Author: Sutanu SarkarPublisher:
ISBN:
Category : Fibers
Languages : en
Pages : 226
Book Description
A Study of Fiber Suspensions
Author: Sutanu SarkarPublisher:
ISBN:
Category : Fibers
Languages : en
Pages : 226
Book Description
A Study of Fiber Orientation in Particle-loaded Suspensions Using a Direct Simulation Method with Collision Strategy
Author: Xiaoqing LiPublisher:
ISBN: 9781369123999
Category :
Languages : en
Pages : 89
Book Description
Short-fiber reinforced composite materials are widely in use in the manufacturing industries to bridge the property gap between continuous-fiber composites and unreinforced materials. Short-fiber composites can effectively strengthen the matrix materials along the fiber length direction, and can still be processed by highly-automated and economical methods such as injection or compression molding. It’s essential to understand and predict the fiber orientation and its influence on the mechanical properties of the composite. However, the hydrodynamic interactions between the matrix and the fibers, and the inter-fiber interactions are not fully understood yet. Sometimes circular particles are added to the matrix for toughening and this may also influence the orientation of the short fibers during flow. In this thesis, we adopt a two-dimensional direct simulation method to investigate, for the first time, the effect of the presence of circular particles on the fiber orientation of short-fiber suspensions. To deal with the collision between fibers or fibers and particles, an ad-hoc method is proposed and developed. We predict the time-evolution of the elliptical fiber orientation as the volume fraction and aspect ratio increases, and compare it with that of the fiber-particle suspensions. The interaction coefficient C1 is calculated and compared with existing models. It is found that the presence of circular particles increases the rotary diffusion of a fiber suspension, and that, as the content of circular particles increases, the fiber alignment in the direction of shear is less pronounced.
A Study of the Transport Properties and Sedimentation Characteristics of Fiber Suspensions
Author: Michael Brian MackaplowPublisher:
ISBN:
Category :
Languages : en
Pages : 544
Book Description
A Study of Fiber Suspension Rheology in Planar Flow Fields
Author: Lan TangPublisher:
ISBN:
Category : Multiphase flow
Languages : en
Pages : 330
Book Description
Fiber Motion in Turbulent Flow
Author: Shams Forruque AhmedPublisher:
ISBN: 9783846548660
Category :
Languages : en
Pages : 76
Book Description
An Experimental Study of Fiber Suspensions Between Counter-rotating Discs
Author: Charlotte AhlbergPublisher:
ISBN: 9789174154849
Category :
Languages : en
Pages : 79
Book Description
Flow of Dilute Fiber Suspensions
Author: A. A. RobertsonRheology of Non-spherical Particle Suspensions
Author: Francisco ChinestaPublisher: Elsevier
ISBN: 0081008120
Category : Science
Languages : en
Pages : 398
Book Description
This book provides a review of the current understanding of the behavior of non-spherical particle suspensions providing experimental results, rheological models and numerical modeling. In recent years, new models have been developed for suspension rheology and as a result applications for nanocomposites have increased. The authors tackle issues within experimental, model and numerical simulations of the behavior of particle suspensions. Applications of non-spherical particle suspension rheology are widespread and can be found in organic matrix composites, nanocomposites, biocomposites, fiber-filled fresh concrete flow, blood and biologic fluids. - Understand how to model and predict the final microstructure and properties of particle suspensions - Explores nano, micro, meso and macro scales - Rheology, thermomechanical and electromagnetic physics are discussed
Rheology of Concentrated Suspensions of Fibers in Tube Flow: II. An Exploratory Study
Author: Richard O. MaschmeyerPublisher:
ISBN:
Category :
Languages : en
Pages : 27
Book Description
The viscosities of concentrated suspensions of glass fibers in high viscosity silicone oil were measured with a capillary viscometer using 1/4 inch and 1/8 inch diameter capillaries. Suspension fiber length distributions and rheological properties were highly dependent on mixing technique. The viscosity of the suspensions was strongly dependent on fiber length distribution--a few percent of relatively long fibers in the distribution doubled or tripled the suspension viscosity. Special attention was paid to wall effects which complicate the interpretation of suspension viscosity data. Yield stresses, squeeze-through, the capillary entrance exclusion were observed; their magnitudes increased with fiber length and depended strongly on fiber length distribution.
Analysis of Flexible Fiber Suspensions Using the Lattice Boltzmann Method
Author: Sheila RezakPublisher:
ISBN:
Category : Fiber reclamation
Languages : en
Pages :
Book Description
Results from simulation show the rigid fiber in simple shear flow produces a good agreement for orientation of a fiber relative to the theoretical study by Jeffery (1922). The flexible fiber exhibits an increase on the rotational period from the rigid fiber due to more deformation shape is revealed during rotation. The simulation technique demonstrates the ability to simulate fiber-fiber interactions to further study of relative viscosity of suspensions in shear flow. Simulation results show that fiber orientation and relative viscosity depend on the fiber characteristics (fiber aspect ratio, fiber flexibility, and volume fraction). The results are verified against known experimental measurements and theoretical results.