In the limit of a large yield stress, or equivalently at the initiation of motion, viscoplastic flows can develop narrow boundary layers that provide either surfaces of failure between rigid plugs, the lubrication between a plugged flow and a wall or buffers for regions of predominantly plastic deformation.

The archetypal feature of a viscoplastic fluid is its yield stress: If the material is not sufficiently stressed, it behaves like a solid, but once the yield stress is exceeded, the material flows like a fluid.

Mathématiques et Applications, vol 79. Springer, Cham. First Online 27 October 2016; DOI https://doi.org/10.1007/978-3-319-44362-1_3; Publisher Name Springer, Cham; Print ISBN 978-3-319-44361-4; Online ISBN 978-3-319-44362-1; eBook Packages Mathematics and Statistics; Buy this book on publisher's site Afonso Paiva, Fabiano Petronetto, Thomas Lewiner, Geovan TavaresSimulations of viscoplastic materials are traditionally governed by continuum mechanics. The 40.10 Viscoelastic Fluids. These are fluids that have the ability to store and recover shear energy and, hence, show some properties of a solid and some properties of a liquid. There are two easily observable examples of viscoelastic behavior: The rheological behavior of the viscoplastic fluids is represented by the Herschel‐Bulkley viscosity function. The deformation behavior of commonly encountered viscoplastic fluids is generally complicated by the presence of wall slip at solid walls, which is a function of the wall shear stress.

Albert Magnin. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER.

Heat transfer prediction of in-service welding in a forced flow of fluid An Eulerian thermomechanical elastic–viscoplastic model with isotropic and directional Simulation of permanent deformation using an elastic-viscoplastic constitutive In many geophysical applications, fractures control the flow of fluids such as a hydrodynamic limit of a correlated site percolation model of a viscoplastic fluid.

Consequently, the theory of the fluid mechanics of such materials has applications in wide array of different fields, ranging from the oil, gas and chemical industries, to food processing and to geophysical fluid dynamics. Viscoplastic flow behaviour was first modelled by Eugene Bingham in 1922.

Lattice Boltzmann Method (LBM) has been applied to solve the Abstract This work is concerned with computational modelling of viscoplastic fluids. The flows considered are assumed to be incompressible, while the These notes are intended to supplement a short lecture course covering the theoretical background of the dynamics of ideal visco-plastic fluids, e.g. Bingham Visco-plastic fluids combine solid-like behavior in the absence of intervention and fluid-like response at stress. The shift between this two conditions is formalized Viscoplastic fluids behave differently from Newtonian fluids as they present a yield stress and consequently their viscosity is shear rate dependent [8].

Abstract. Bingham fluids constitute a very important class of non-Newtonian fluids. The modeling of Bingham materials is of crucial importance in industrial applications, since a large variety of materials (e.g. foams, pastes, slurries, oils, ceramics, etc.) exhibit the fundamental character of viscoplasticity, that is the capability of flowing only if the stress is above some critical value.

Reference Dinkgreve, Paredes, Denn and Bonn 2016).To increase the visibility of the droplets during the recordings, a Viscoplastic Fluids: From Theory to Application. Edited by Neil J. Balmforth, John R. de Bruyn, Monica F. Naccache.

In the limit of a large yield stress, or equivalently at the initiation of motion, viscoplastic flows can develop narrow boundary layers that provide either surfaces of failure between rigid plugs, the lubrication between a plugged flow and a wall or buffers for regions of predominantly plastic deformation.
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of Alberta, T6G 2W2, Edmonton AB, Canada 2Dept. of Civil Engineering, Lakehead University, P7B 5E1, Thunder Bay, ON, Canada *corresponding author: david.zhu@ualberta.ca , Tel: (780) 492-5813 Viscoplastic Fluids; by flwmaster. Published November 7, 2016. Authors Dimakopoulos Y., Tsamopoulos J. Abstract We study the transient displacement of Newtonian and viscoplastic liquids by highly pressurized air in cylindrical tubes of finite length with an expansion followed by … We present an experimental and numerical study of the turbulent displacement of viscoplastic fluids in a horizontal eccentric annulus. Several experiments where a weighted Newtonian fluid displaces a yield stress fluid under a turbulent flow condition are presented and discussed.

The flows considered are assumed to be incompressible, while the These notes are intended to supplement a short lecture course covering the theoretical background of the dynamics of ideal visco-plastic fluids, e.g. Bingham Visco-plastic fluids combine solid-like behavior in the absence of intervention and fluid-like response at stress. The shift between this two conditions is formalized Viscoplastic fluids behave differently from Newtonian fluids as they present a yield stress and consequently their viscosity is shear rate dependent [8].
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Numerical flow simulation of viscoplastic fluids in annuli. The Canadian Journal of Chemical Engineering 1998, 76 (1) , 27-40. DOI: 10.1002/cjce.5450760105. YEH WANG. AXIAL FLOW OF GENERALIZED VISCOPLASTIC FLUIDS IN NON-CIRCULAR DUCTS. Chemical Engineering Communications 1998, 168 (1) , 13-43. DOI: 10.1080/00986449808912705.

The consequence for a cylinder moving through a viscoplastic fluid is that there is no motion if the force on the object is insufficient to yield the fluid. G. Ovarlez, S. Cohen-Addad, K. Krishan, J. Goyon, P. Coussot. Pages 68-79. Download PDF. Article preview. select article Flow of elasto-viscoplastic thixotropic liquids past a confined cylinder. https://doi.org/10.1016/j.jnnfm.2012.08.007. Research articleFull text access.