27 Jul 2018 Keywords: Yield-Stress Fluids, Viscoplasticity, Constitutive modeling. 1. Introduction. Elasto-Viscoplastic (or EVP) behavior is frequently

7 Aug 2018 and droplets in viscoelastic and elastoviscoplastic (EVP) fluids. of Carbopol gel.24 The elastic effects on viscoplastic fluid flows have also

When the drop is made of a complex fluid the problem presents numerical challenges due to the interaction of the mechanical properties and the free surface approach. In the present work, we solve the numerical problem of elasto-viscoplastic drops colliding in vertical plane. The free 9. de Souza Mendes, P. R., and R. L. Thompson, “ A unified approach to model elasto-viscoplastic thixotropic yield-stress materials and apparent yield-stress fluids,” Rheol.

Viscoplastic and elastoviscoplastic fluids

with interstitial fluids, and may suffer degradation and fracture processes 3 Jan 2019 For this purpose, the elasto-viscoplasticity (EVP) overstress theory is co. for pore fluid drainage and pore pressure equalization (Kolsky 1949; viscoelastic liquids, for approaching the complex behavior of yield stress fluids. M.F. Naccache, P.R.D. Mendes, Flow of elasto-viscoplastic thixotropic liquids Journal of Non-Newtonian Fluid Mechanics journal homepage: www.elsevier. com/locate/jnnfm. The “avalanche effect” of an elasto-viscoplastic thixotropic Post Doc., Aalto University, Finland - ‪‪Cited by 282‬‬ - ‪Computational fluid‬ Computational modeling of multiphase viscoelastic and elastoviscoplastic flows. For this purpose, the elasto-viscoplasticity (EVP) overstress theory is combined insucient time for pore fluid drainage and pore pressure equalization (Kolsky Mots clefs : copper alloy, elasto-viscoplasticity, damage, extreme loading, identification, robustness.

An analytical study of elastoviscoplastic fluid flow in tubes of non-circular cross section is presented. The constitutive structure of the fluid is described by a linear frame invariant combination of the Phan-Thien−Tanner model of viscoelastic fluids and the Bingham model of plastic fluids.

A new elastoviscoplastic model based on the Herschel-Bulkley viscoplastic model. Journal of Non-Newtonian Fluid Mechanics, Elsevier, 2009, 158 (1-3), pp.154-161.

Viscoplastic and elastoviscoplastic fluids

Elastoviscoplastic (EVP) fluids can be found in geophysical applications, such as mudslides and the tectonic dynamic of the Earth. The EVP fluids are also found in industrial applications such as mining operations, the conversion of biomass into fuel, and the petroleum industry, to name a few.

Recent experiments have shown that most of them exhibit also elastic, hence the term elasto-viscoplastic (EVP), and thixotropic (hence, TEVP) properties. We investigate the radial oscillations of small gas bubbles trapped in yield-stress fluids and driven by an acoustic pressure field.

The Originally it was believed that YS materials are just generalized Newtonian fluids, i.e.
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The work explores the viscoplastic regime, via the Bingham–Papanastasiou model, and extends this into the viscoelastoplastic regime through the Papanastasiou–Oldroyd model. Our Abstract An analytical study of the forced convection of an elastoviscoplastic fluid in tubes of arbitrary cross section is presented. The constitutive structure of the fluid is described by a frame indifferent linear combination of the Modified Phan-Thien-Tanner model of non-linear viscoelastic fluids and the Bingham model of non-linear plastic fluids. A new elastoviscoplastic model based on the Herschel-Bulkley viscoplastic model Pierre Saramito To cite this version: Pierre Saramito.

The constitutive structure of the fluid is described by a linear frame invariant combination of the Phan-Thien−Tanner model of viscoelastic fluids and the Bingham model of plastic fluids. The analysis also yields the solution of the forced convection of linear (Newtonian) fluids in non-circular tubes and the forced convection in circular tubes of the family of non-linear fluids (viscoplastic, viscoelastic, elastoviscoplastic) described by the constitutive structure under consideration thereby providing as well validation for the computations carried out for non-linear fluids in Its predictive capability includes thixotropy, viscoelasticity and yielding behavior. It is composed by two differential equations, one for the stress and the other for the structure parameter—a scalar quantity that represents the structuring level of the fluid.
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Experimental investigation of viscoplastic free-surface flows in a steady uniform F. 2012 Steady Couette flow of elastoviscoplastic fluids are non-unique.

The constitutive structure of the fluid is described by a frame indifferent linear combination of the Modified Request PDF | Forced Convection of Elastoviscoplastic Fluids in Non-Circular Tubes | An analytical study of the forced convection of an elastoviscoplastic fluid in tubes of arbitrary cross section We present numerical simulations of laminar and turbulent channel flow of an elastoviscoplastic fluid. The non-Newtonian flow is simulated by solving the full incompressible Navier-Stokes equations coupled with the evolution equation for the elastoviscoplastic stress tensor. The laminar simulations are carried out for a wide range of Reynolds numbers, Bingham numbers and ratios of the fluid Some elasto-viscoplastic preliminary results obtained at the Laboratory of Applied and Computational Fluid Mechanics (LAMAC) from the Federal University of R (2020) Chaparian et al. Meccanica. A numerical and theoretical study of yield-stress fluid flows in two types of model porous media is presented. We focus on viscoplastic and elastoviscoplastic flows to reveal some differences and similarities between these two classes of flows. Elastoviscoplastic fluids are a class of yield-stress fluids that behave like neoHookean (or viscoelastic) solids when the imposed stress is less than the yield stress whereas after yielding, their behaviour is described by a viscoplastic fluid with an additional elastic history.

The analysis also yields the solution of the forced convection of linear (Newtonian) fluids in non-circular tubes and the forced convection in circular tubes of the family of non-linear fluids (viscoplastic, viscoelastic, elastoviscoplastic) described by the constitutive structure under consideration thereby providing as well validation for the computations carried out for non-linear fluids in

�hal Elastoviscoplastic behavior model of electrorheological fluids in various deformation modes E V Korobko1, M A Zhurauski and A A Makhaniok A.V. Luikov Heat and Mass Transfer Institute of NAS Belarus, 220072, 15 P. Brovka str., Minsk, Belarus E-mail: evkorobko@gmail.com Abstract. IntroductionNumerical results of inertialess flows of elasto-viscoplastic fluids inside a lid-driven cavity are presented and discussed. The flow of a viscoplastic fluid is characterized by two distinct regions: an unyielded region, where the stress is below the material yield limit, and the deformation is extremely low, and an yielded region, which appears where the stresses exceed such a limit. Abstract Inertialess flows of elasto-viscoplastic fluids inside a leaky cavity are numerically analyzed using the finite element technique, with the goal of understanding the influence of both the elastic and viscous effects on the topology of the yield surfaces of an elasto-viscoplastic material.

The equation for stress is obtained in accordance with a simple mechanical analog An analytical study of the forced convection of nonlinear elastoviscoplastic fluids in tubes of arbitrary cross section is presented. The constitutive structure of the fluid is described by a frame indifferent linear combination of the Modified Request PDF | Forced Convection of Elastoviscoplastic Fluids in Non-Circular Tubes | An analytical study of the forced convection of an elastoviscoplastic fluid in tubes of arbitrary cross section We present numerical simulations of laminar and turbulent channel flow of an elastoviscoplastic fluid. The non-Newtonian flow is simulated by solving the full incompressible Navier-Stokes equations coupled with the evolution equation for the elastoviscoplastic stress tensor. The laminar simulations are carried out for a wide range of Reynolds numbers, Bingham numbers and ratios of the fluid Some elasto-viscoplastic preliminary results obtained at the Laboratory of Applied and Computational Fluid Mechanics (LAMAC) from the Federal University of R (2020) Chaparian et al.