Heat transfer prediction of in-service welding in a forced flow of fluid An Eulerian thermomechanical elastic–viscoplastic model with isotropic and directional

UDEC has the capability to perform the analysis of fluid flow through the A visco-plastic flow model is also available to simulate flow of cement grout in the

Similar flows occur in drilling operations of oil and gas wells. [2] Fluid mechanics of microrheology: T. M. Squires & T. G. Mason Annu. Rev. Fluid Mech, 42, 413 (2010) [3] Optical measurements of frequency dependent linear viscoelastic moduli of complex fluids: Phys. Rev. Lett, 74, 1250 (1995) [4] Probing linear and nonlinear microrheology of viscoelastic fluids: J. R. Gomez-Solano & C. Bechinger, EPL, 108 Withdrawal of water-capped viscoplastic fluid was investigated using laboratory experimentation and numerical modeling. The viscoplastic fluid was modeled using a Laponite suspension, which was withdrawn by a vertical pipe intake. Variations of the Laponite–water interface and intake configurations were investigated in this study. Rayleigh and Marangoni convection and rheology are linked in the thermal convection of viscoelastic fluids to some recent technological applications.

Variations of the Laponite–water interface and intake configurations were investigated in this study. Rayleigh and Marangoni convection and rheology are linked in the thermal convection of viscoelastic fluids to some recent technological applications. Such technology developments as the ones presented here undoubtedly shall be based on interdisciplinary projects involving not only rheology or fluid mechanics but several other disciplines. INTRODUCTION.

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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. Rayleigh-Bénard convection for viscoplastic fluids @article{Darbouli2011RayleighBnardCF, title={Rayleigh-B{\'e}nard convection for viscoplastic fluids}, author={Mohamed Darbouli and Christel M{\'e}tivier and J. Piau and A. Magnin and Ahmed Abdelali}, journal={Physics of Fluids}, year={2011}, volume={25}, pages={023101} } An important class of non-Newtonian fluids presents a yield stress limit which must be exceeded before significant deformation can occur – the so-called viscoplastic fluids or Bingham plastics.

In a perfectly viscoplastic solid, also called the Norton-Hoff model of viscoplasticity, the stress (as for viscous fluids) is a function of the rate of permanent strain. The effect of elasticity is neglected in the model, i.e., and hence there is no initial yield stress, i.e.,

A classification of flowfields for the flow of a Bingham fluid in general eccentric annular geometries is presented.

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.
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The polymeric solution is essentially an aqueous mixture of Carbopol that is pH-neutralized with triethanolamine (see Dinkgreve et al. 2016).

For Newtonian fluids the stress constitutive equation is well known; for viscoelastic fluids there are many different constitutive equations that have been A difficulty in any flow calculation with viscoplastic fluids such as Bingham fluids is the determination of possible plug zones in which no deformation occurs. This paper investigates the flow in a concentric annulus when there is both an axial and tangential flow, the tangent flow arising from rotation of the inner cylinder of the annulus.
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Developments in Viscoplastic Fluid Mechanics Neil J. Balmforth, 1Ian A. Frigaard,,2 and Guillaume Ovarlez3 1Department of Mathematics and 2Department of Mechanical Engineering, University of British Columbia, Vancouver V6T 1Z2, Canada; email: njb@math.ubc.ca 3Laboratoire Navier (UMR 8205), CNRS, ENPC, IFSTTAR, Universite Paris-Est´

DOI: 10.1063/1.4790521 Corpus ID: 40284535. Rayleigh-Bénard convection for viscoplastic fluids @article{Darbouli2011RayleighBnardCF, title={Rayleigh-B{\'e}nard convection for viscoplastic fluids}, author={Mohamed Darbouli and Christel M{\'e}tivier and J. Piau and A. Magnin and Ahmed Abdelali}, journal={Physics of Fluids}, year={2011}, volume={25}, pages={023101} } viscoplastic ﬂuid s lippage when the slip is directly linked to the tribological conditions at the ﬂuid–structure interface [ 5,6,12]. The purpose of this paper is then to have a better Example models of viscoplastic liquids include Bingham plastic, Hershel-Bulkley and Casson (there is a detailed discussion in the link).

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The ability of alignment of low molecular liquid crystals and electrical. properties of TiO 2 associated with complex viscoplasticity of the systems. One of the

Regarding the viscoplastic fluid flow past triple cylinders (as mentioned in the Introduction), to the best of the authors’ knowledge, this is the first study that examines the interaction between the cylinders and the unyielded regions around the objects in the presence of the viscoplastic fluid. the viscoplastic (VP) ﬂuids which can be categorized as ‘simple’ yield-stress ﬂuids. Apart from ‘simple’ yield-stress ﬂuids, different attempts have been made to categorize more complex yield-stressﬂuidsfromdifferentperspectives(e.g.,see [31]).