E. Chaparian et al., "Yield-stress fluids in porous media : a comparison of viscoplastic and elastoviscoplastic flows," Meccanica (Milano. Print), vol. 55, no. 2, s.
The constitutive structure of the EVP fluid obeys a linear combination of the Phan- Thien-Tanner model for viscoelastic fluids and the Bingham model for
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. A new elastoviscoplastic model based on the Herschel-Bulkley viscoplastic model.
the constitutive equations for incompressible and compressible viscoplastic fluids is given in Chapters 2-4. Non-Associated Elasto-Viscoplastic Models for Rock Salt. Doctoral students in simulations and experiments with complex fluids we are looking for 3 PhD students to study viscoplastic and elastoviscoplastic fluids. Swedish University essays about NON-NEWTONIAN FLUID. methodology in predicting the fillability of non-Newtonian viscoelastic product Abstract : In this study, instability and failure in complex fluids (Elastoviscoplastic fluids) is explored MPAME SOLID AND FLUID MECHANICS, MSC PROGR Examples are theories of elastoplasticity, elastoviscoplasticity and Formulate and implement visco-plastic constitutive response pertinent to a 1D beam-structure. Bodner–Partom viscoplastic modell lag används för att återspegla elasto-viscoplastic beteende olika material 20, 21.
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.
Viscoplastic fluid Elastoviscoplastic fluid 1 Introduction Non-Newtonian fluid flows in porous media are of great practical importance for numerous industries A constitutive model for structured fluids is presented. Its predictive capability includes thixotropy, viscoelasticity and yielding behavior.
they behave as purely viscous fluids, with constant or shear thinning viscosity. Viscoplastic fluids can present elasticity and thixotropy. Recently, an Oldroyd-B type constitutive equation was proposed by (de Souza Mendes, 2009) to model the behavior of elasto-viscoplastic fluids, and also thixotropy. The equation involves the
We focus on viscoplastic and elastoviscoplastic flows to reveal some differences and similarities between these two classes of flows.
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. Acta 52 , 673– 694 (2013). Originally it was believed that YS materials are just generalized Newtonian fluids, i.e. fluids with a viscosity that depends on the strain-rate when the yield-stress is exceeded.
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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.
Journal of Non-Newtonian Fluid Mechanics, Elsevier, 2009, 158 (1-3), pp.154-161.
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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.
By increasing the yield stress, the difference in the pressure drops between the they behave as purely viscous fluids, with constant or shear thinning viscosity. Viscoplastic fluids can present elasticity and thixotropy. Recently, an Oldroyd-B type constitutive equation was proposed by (de Souza Mendes, 2009) to model the behavior of elasto-viscoplastic fluids, and also thixotropy. The equation involves the In this paper, a three‐dimensional numerical solver is developed for suspensions of rigid and soft particles and droplets in viscoelastic and elastoviscoplastic (EVP) fluids.
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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.
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.