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Showing 1 to 20 of 49 for “"non-Newtonian fluid"”.
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A variational multiscale framework for non-Newtonian fluid models
… stabilized mixed finite element formulations for non-Newtonian models for complex fluids. One class of non-Newtonian fluids is shear-rate dependent fluids that include nonlinear viscosity functions of the second invariant of the rate-of-deformation tensor, thereby resulting in shear-thinning or …
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High speed imaging of transient non-Newtonian fluid phenomena
… into the nature of short-duration transient fluid phenomena, specifically applied to the Kaye effect. The Kaye effect, noted by A. Kaye in the March 9, 1963 issue of Nature, is the deflection and rebound of a free-falling non-Newtonian fluid stream incident on a pool of the same fluid. The …
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Numerical simulation of non-Newtonian fluid flow in mixing geometries
… a theoretical investigation is undertaken into fluid and mixing flows generated by various geometries for Newtonian and non-Newtonian fluids, on both sequential and parallel computer systems. The thesis begins by giving the necessary background to the mixing process and a summary of the …
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Inertio- and Elasto-Magnetic Fractionation of Multiple Microparticles in Newtonian and Non-Newtonian Fluid
Sorting of microparticles and cells using microfluidic platforms has several applications in diagnosis, biotechnology, and medicine. However, the currently available microfluidic sorting techniques have one or more of the following drawbacks such as low throughput, need for diluting sheath flows …
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An experimental investigation of the breakup of a viscoelastic non-newtonian fluid in a supersonic stream
… of the aerodynamic breakup of a viscoelastic non-Newtonian liquid injected into a supersonic stream was conducted. All test runs were made either at a free stream Mach number of 2.4 and a total pressure of 4.1 atm or a Mach number of 4.0 and a total pressure of 10.9 atm. The air flow had a …
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Unsteady newtonian and non-newtonian fluid flows in the circular tube in the presence of magnetic field using caputo-fabrizio derivative
… the magnetohydrodynamics (MHD) transport of Newtonian and non-Newtonian fluids flows inside a circular channel. The flow was subjected to an external electric field for the Newtonian model and a uniform transverse magnetic field for all models. Pressure gradient or oscillating boundary …
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A WC-MPS Model for Viscous Free Surface Flows
… discrete particles in MPMs. As in computational fluid dynamics (CFD) problems, the field variables, such as location, velocity, pressure, force and other variables (e.g. mass, momentum, energy) are included into each particle. Therefore, the movement of the real physical system is directly …
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Targeted drug delivery within the eye
… delivery. The results show that a strongly non-Newtonian fluid can be used to slow down the spreading of the particles at the injection site up to 2 months. The results also show that a high molecular weight formulation with weakly non-Newtonian fluid can be used to reach 100% coverage of …
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Dynamics of Nanoparticles in Complex Media
… applications require nanoparticles suspended in non-Newtonian fluids to be controllably dispersed through complex porous media. In this dissertation, the role of non-Newtonian fluid characteristics on mobility of nanoparticles through complex media is studied. First, the diffusive mobility of …
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Effects of viscous dissipation on hydrodynamic stability of viscoelastic fluids
Two constitutive equations for viscoelastic fluids are examined in linearized hydrodynamic stability analysis for the effects of viscous dissipation, in plane Couette flow heated from below. All physical properties are assumed constant except the density in the body-force term of the momentum …
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Modeling of Solid Particle Transport in Fractures and Its Applications to Proppant Placement During Hydraulic Fracturing Operations
… as the intricate interactions among particles, fluids, and rock matrix, it is, therefore, an extremely challenging task to accurately predict the associated transport and placement behaviour of solid particles in a hydrocarbon reservoir. Theoretically, a robust and pragmatic method has been …
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Efeitos viscosos em cilindros imersos em fluidos não-newtonianos
… of a bi-dimensional interface immersed in a non-Newtonian fluid, whose rheological behaviour can be described by the power law model. Arbitrary values of the flow behaviour index (n) were considered and results for three different values are presented, including the case of a Newtonian fluid …
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Unsteady blood flow in the stenosed artery subjected to magnetic field and injected nanoparticles
… current work. The blood, which was modelled as Newtonian or non-Newtonian fluid, was subjected to an oscillating pressure gradient and a periodic body acceleration. In the first problem, the magnetic field and the porosity were considered. In the second problem, the augmentation of heat transfer …
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Brownian dynamics simulations of fine-scale molecular models
One of the biggest challenges in non-Newtonian fluid mechanics is calculating the polymer contribution to the stress tensor, which is needed to calculate velocity and pressure fields as well as other quantities of interest. In the case of a Newtonian fluid, the stress tensor is linearly …
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Numerical Simulation of High Expansion Foam Into Conduits and Mine Openings
… underground configurations using computational fluid dynamics (CFD) simulations. An experimental apparatus was built to study the foam rheology in order to determine the rheological model parameters to simulate foam as a continuous Non-Newtonian fluid. Furthermore, numerical and experimental …
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Recent numerical techniques for differential equations arising in fluid flow problems
… method (BSQLM), in solving problems arising in fluid flow. Firstly, we use the SQLM to solve the highly non-linear one dimensional Bratu problem. The results obtained are compared with exact solution and previously published results using the B-spline method, Picard’s Green’s Embedded Method and …
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Slowly varying pipe flow of thixotropic fluids
… flows of thixotropic and antithixotropic fluids in two flow problems: unsteady flow in a slowly varying 3D pipe, and oscillating flow in a uniform cylindrical pipe. We consider two fluid models which exhibit interesting non-Newtonian behaviour: the viscous Moore-Mewis-Wagner (MMW)model, …
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Stabilized finite element solution of optimal control problems in computational fluid dynamics
… optimal design problems involving blood as the fluid. The discretization of the governing equations of fluid flow is accomplished using stabilized finite element formulations. Although frequently and successfully applied, these methods depend on significant mesh refinement to establish strong …
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Characterization of Filter Cake Buildup and Cleanup under Dynamic Fluid Loss Conditions
… gas and shale gas reservoirs that uses a viscous fluid to fracture the reservoir rock and uniformly transport proppant to create a highly conductive path that is kept open by the proppant after fracturing. This method is used to improve the productivity of the otherwise low permeability …
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