Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip

An experimental and numerical investigation of the rotational rheometry of yield-stress materials is performed, using waterbased Carbopol dispersions. The flow and fluid characterization in different rheometer geometries, namely the smooth Couette, the grooved Couette, and the vane-in-cup are analys...

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Main Authors:	Marchesini Flávio H., Naccache Mônica F., Abdu Aline, Alicke Alexandra A., Mendes Paulo R. de Souza
Format:	Article
Language:	English
Published:	De Gruyter 2015-10-01
Series:	Applied Rheology
Subjects:	rheometry apparent wall slip yield stress viscoplastic materials
Online Access:	https://doi.org/10.3933/applrheol-25-53883

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spelling	doaj-bdd2ca19dcda4fb986784b38873596fb2021-09-06T19:41:56ZengDe GruyterApplied Rheology1617-81062015-10-01255324110.3933/applrheol-25-53883Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall SlipMarchesini Flávio H.0Naccache Mônica F.1Abdu Aline2Alicke Alexandra A.3Mendes Paulo R. de Souza4Department of Mechanical Engineering, Pontifícia Universidade Católica-RJ, Rua Marquês de São Vicente 225,Rio de Janeiro, RJ 22453-900, BrazilDepartment of Mechanical Engineering, Pontifícia Universidade Católica-RJ, Rua Marquês de São Vicente 225,Rio de Janeiro, RJ 22453-900, BrazilDepartment of Mechanical Engineering, Pontifícia Universidade Católica-RJ, Rua Marquês de São Vicente 225,Rio de Janeiro, RJ 22453-900, BrazilDepartment of Mechanical Engineering, Pontifícia Universidade Católica-RJ, Rua Marquês de São Vicente 225,Rio de Janeiro, RJ 22453-900, BrazilDepartment of Mechanical Engineering, Pontifícia Universidade Católica-RJ, Rua Marquês de São Vicente 225,Rio de Janeiro, RJ 22453-900, BrazilAn experimental and numerical investigation of the rotational rheometry of yield-stress materials is performed, using waterbased Carbopol dispersions. The flow and fluid characterization in different rheometer geometries, namely the smooth Couette, the grooved Couette, and the vane-in-cup are analysed. The bi-dimensional flow governing equations are solved numerically, using the finite volume method and Fluent software (Ansys Inc.). The viscoplastic behavior of Carbopol dispersions is modeled using the Generalized Newtonian constitutive equation with the regularized viscoplastic viscosity function proposed by de Souza Mendes and Dutra [1], herein called SMD function. The flow pattern and the presence of apparent wall slip in rheometric measurements of yield-stress materials are investigated and discussed.https://doi.org/10.3933/applrheol-25-53883rheometryapparent wall slipyield stressviscoplastic materials
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Marchesini Flávio H. Naccache Mônica F. Abdu Aline Alicke Alexandra A. Mendes Paulo R. de Souza
spellingShingle	Marchesini Flávio H. Naccache Mônica F. Abdu Aline Alicke Alexandra A. Mendes Paulo R. de Souza Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip Applied Rheology rheometry apparent wall slip yield stress viscoplastic materials
author_facet	Marchesini Flávio H. Naccache Mônica F. Abdu Aline Alicke Alexandra A. Mendes Paulo R. de Souza
author_sort	Marchesini Flávio H.
title	Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip
title_short	Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip
title_full	Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip
title_fullStr	Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip
title_full_unstemmed	Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip
title_sort	rheological characterization of yield-stress materials: flow pattern and apparent wall slip
publisher	De Gruyter
series	Applied Rheology
issn	1617-8106
publishDate	2015-10-01
description	An experimental and numerical investigation of the rotational rheometry of yield-stress materials is performed, using waterbased Carbopol dispersions. The flow and fluid characterization in different rheometer geometries, namely the smooth Couette, the grooved Couette, and the vane-in-cup are analysed. The bi-dimensional flow governing equations are solved numerically, using the finite volume method and Fluent software (Ansys Inc.). The viscoplastic behavior of Carbopol dispersions is modeled using the Generalized Newtonian constitutive equation with the regularized viscoplastic viscosity function proposed by de Souza Mendes and Dutra [1], herein called SMD function. The flow pattern and the presence of apparent wall slip in rheometric measurements of yield-stress materials are investigated and discussed.
topic	rheometry apparent wall slip yield stress viscoplastic materials
url	https://doi.org/10.3933/applrheol-25-53883
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Rheological Characterization of Yield-Stress Materials: Flow Pattern and Apparent Wall Slip

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