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Electro-osmotic oscillatory flow of viscoelastic fluids in a microchannel
Journal of Non-Newtonian Fluid Mechanics, 2019This work presents an analytical solution for electro-osmotic flow (EOF) in small amplitude oscillatory shear (SAOS) as a measuring tool suitable to characterize the linear viscoelastic properties of non-Newtonian fluids in microchannel flow. The flow in
S. Sadek, F. Pinho
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Spinnability simulation of viscoelastic fluid
ACM SIGGRAPH 2010 Posters, 2010One of the most challenging issues of computer graphics is to represent the behavior of fluid. Visualizing the fluid behavior requires to solve Navier-Stokes equations, which take huge amount of time so that some researches use many super computers for the simulation, and others utilize the GPU performance.
Nobuhiko Mukai +3 more
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Sink Flows of Viscoelastic Fluids
Journal of Rheology, 1986Both two-constant and three-parameter upper convected Maxwell-Oldroyd models of viscoelastic fluids are used in this analysis of spherical and cylindrical sink flows. For spherical sink flows the stresses rise rapidly initially and the stress levels attained are large but bounded, while for cylindrical sink flows the viscoelastic stresses are modest ...
Chakraborty, A. K., Metzner, A. B.
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Secondary flows of viscoelastic fluids in serpentine microchannels
Microfluidics and Nanofluidics, 2018Secondary flows are ubiquitous in channel flows, where small velocity components perpendicular to the main velocity appear due to the complexity of the channel geometry and/or that of the flow itself such as from inertial or non-Newtonian effects.
Lucie Ducloué +7 more
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Journal of Non-Newtonian Fluid Mechanics, 2018
In this paper, the lateral migration of a neutrally buoyant spherical particle in a pressure-driven rectangular-shaped channel flow of Giesekus viscoelastic fluids is numerically investigated with a fictitious domain method. The particle trajectories are
Peng Wang, Zhaosheng Yu, Jianzhong Lin
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In this paper, the lateral migration of a neutrally buoyant spherical particle in a pressure-driven rectangular-shaped channel flow of Giesekus viscoelastic fluids is numerically investigated with a fictitious domain method. The particle trajectories are
Peng Wang, Zhaosheng Yu, Jianzhong Lin
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SWIRLING FLOWS OF VISCOELASTIC FLUIDS
Computers & Structures, 1988Few problems in Newtonian fluid mechanics can match the attention which has been given to the study of the flow of a Newtonian fluid between two parallel plates rotating about a common axis. Most of these analyses are based on the similarity transformation of Kármán to study axisymmetric solutions. Recently, \textit{S. V.
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On the oldroid model of a viscoelastic fluid
Functional Analysis and Its Applications, 1999The author studies the following initial-boundary value problem: \(v_t(t, x)+ D(v)- \gamma_1\Delta v(t,x)- \gamma_2\Delta \int^t_0\exp(\alpha(s- t)) v(s, x) ds+ \nabla p(t,x)= f(t,x)\), \(\text{div }v(t, x)= 0\), \((t,x)\in Q\), \(\int_\Omega p(t,x) dx= 0\), \(t\geq 0\), \(v(0,x)= v_0(x)\), \(x\in\Omega\), \(v(t,x)= 0\), \(t\geq 0\), \(x\in\partial ...
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Issues In Viscoelastic Fluid Mechanics
Annual Review of Fluid Mechanics, 1990nt transient that may be many orders of magnitude longer than time scales associated with instrument inertia. Intrinsic material time scales can be identified with the dynamics of the macro molecular chains. Shaping processes for polymeric materials are usually carried out in the liquid state, often over times that are rapid relative to those ...
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Peculiarity in the Rayleigh-Bénard convection of viscoelastic fluids
International journal of thermal sciences, 2018The Rayleigh-Benard convection of viscoelastic fluids in a cavity is simulated using the grid-by-grid inversion method. The grid-by-grid inversion method allows the algorithms for Newtonian fluids to be applicable to viscoelastic fluids using a technique
H. Park
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The Propagation of Vorticity in a Viscoelastic Fluid
Journal of Non-Newtonian Fluid Mechanics, 1985A layer of constant vorticity exists in an infinite space of incompressible isotropic viscoelastic fluid for which the shear stress for rectilinear shearing flows depends linearly on the history of the velocity gradient. At some instant of time the forces maintaining this flow are removed.
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