Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests

The rheological behavior of non-Newtonian fluids in turbulent conditions is an important topic in several fields of engineering. Nevertheless, this topic was not deeply investigated in the past due to the complexity of the experimental tests for the assessment of the constitutive parameters. Pressur...

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Autores principales:	Armando Carravetta, Oreste Fecarotta, Riccardo Martino, Maria Cristina Morani
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	rheology non-Newtonian flow pipe flow Herschel-Bulkley model Hallbom and Klein model Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/948ba2fe8b4e41c49b6f9664eb040d8d
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spelling	oai:doaj.org-article:948ba2fe8b4e41c49b6f9664eb040d8d2021-11-25T17:31:51ZRheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests10.3390/fluids61104192311-5521https://doaj.org/article/948ba2fe8b4e41c49b6f9664eb040d8d2021-11-01T00:00:00Zhttps://www.mdpi.com/2311-5521/6/11/419https://doaj.org/toc/2311-5521The rheological behavior of non-Newtonian fluids in turbulent conditions is an important topic in several fields of engineering. Nevertheless, this topic was not deeply investigated in the past due to the complexity of the experimental tests for the assessment of the constitutive parameters. Pressure pipe tests on Herschel-Bulkley mixtures were proven to be suitable for exploring turbulent conditions, but discrepancies with the results of tests performed in laminar flow were detected. These contradictions could be attributed to the inconsistencies of the Herschel-Bulkley model (HB) for high shear rate flows, proven by Hallbom and Klein, who suggested a more general “yield plastic” model (HK). Hence, in this study, a procedure for the estimation of the rheological parameters of both HB and HK models in pressure pipe tests is defined and rated on a complete set of experiments. The HK model performed much better than HB model in the turbulent range and slightly better than the HB model in the laminar range, confirming the consistency of the “yield plastic” model. The rheological parameters obtained by the proposed procedure were used to numerically model a dam-break propagation of a non-Newtonian fluid, showing significant differences in terms of process evolution depending on the constitutive model.Armando CarravettaOreste FecarottaRiccardo MartinoMaria Cristina MoraniMDPI AGarticlerheologynon-Newtonian flowpipe flowHerschel-Bulkley modelHallbom and Klein modelThermodynamicsQC310.15-319Descriptive and experimental mechanicsQC120-168.85ENFluids, Vol 6, Iss 419, p 419 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rheology non-Newtonian flow pipe flow Herschel-Bulkley model Hallbom and Klein model Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
spellingShingle	rheology non-Newtonian flow pipe flow Herschel-Bulkley model Hallbom and Klein model Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85 Armando Carravetta Oreste Fecarotta Riccardo Martino Maria Cristina Morani Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests
description	The rheological behavior of non-Newtonian fluids in turbulent conditions is an important topic in several fields of engineering. Nevertheless, this topic was not deeply investigated in the past due to the complexity of the experimental tests for the assessment of the constitutive parameters. Pressure pipe tests on Herschel-Bulkley mixtures were proven to be suitable for exploring turbulent conditions, but discrepancies with the results of tests performed in laminar flow were detected. These contradictions could be attributed to the inconsistencies of the Herschel-Bulkley model (HB) for high shear rate flows, proven by Hallbom and Klein, who suggested a more general “yield plastic” model (HK). Hence, in this study, a procedure for the estimation of the rheological parameters of both HB and HK models in pressure pipe tests is defined and rated on a complete set of experiments. The HK model performed much better than HB model in the turbulent range and slightly better than the HB model in the laminar range, confirming the consistency of the “yield plastic” model. The rheological parameters obtained by the proposed procedure were used to numerically model a dam-break propagation of a non-Newtonian fluid, showing significant differences in terms of process evolution depending on the constitutive model.
format	article
author	Armando Carravetta Oreste Fecarotta Riccardo Martino Maria Cristina Morani
author_facet	Armando Carravetta Oreste Fecarotta Riccardo Martino Maria Cristina Morani
author_sort	Armando Carravetta
title	Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests
title_short	Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests
title_full	Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests
title_fullStr	Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests
title_full_unstemmed	Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests
title_sort	rheological characterization of non-newtonian mixtures by pressure pipe tests
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/948ba2fe8b4e41c49b6f9664eb040d8d
work_keys_str_mv	AT armandocarravetta rheologicalcharacterizationofnonnewtonianmixturesbypressurepipetests AT orestefecarotta rheologicalcharacterizationofnonnewtonianmixturesbypressurepipetests AT riccardomartino rheologicalcharacterizationofnonnewtonianmixturesbypressurepipetests AT mariacristinamorani rheologicalcharacterizationofnonnewtonianmixturesbypressurepipetests
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Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests

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