Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations

Enhancing heat transfer rates in heat exchangers is essential in many applications, such as in the food industry. Most fluids used in the food industry are non-Newtonian, whose viscosity is not uniform, and depends on the shear rate and temperature gradient. This is important in the selection of equ...

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Detalhes bibliográficos
Autores: Córcoles Tendero, Juan Ignacio, Marín Alarcón, Ernesto, Almendros Ibáñez, José Antonio
Formato: artículo
Fecha de publicación:2020
País:España
Recursos:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/44484
Acesso em linha:https://hdl.handle.net/10578/44484
Access Level:acceso abierto
Palavra-chave:Computational fluid dynamics
Heat transfer
Non-newtonian fluid
Rheometer
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spelling Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulationsCórcoles Tendero, Juan IgnacioMarín Alarcón, ErnestoAlmendros Ibáñez, José AntonioComputational fluid dynamicsHeat transferNon-newtonian fluidRheometerEnhancing heat transfer rates in heat exchangers is essential in many applications, such as in the food industry. Most fluids used in the food industry are non-Newtonian, whose viscosity is not uniform, and depends on the shear rate and temperature gradient. This is important in the selection of equipment and type of processing. The aim of this work was to numerically simulate, with a non-Newtonian fluid in laminar regime, the heat transfer process in a tube with a curved elbow. The numerical model was validated with published correlations using water as heat transfer fluid. A commercially available fruit juice was used as a non-Newtonian fluid. Its rheological properties were measured using a Modular Compact Rheometer, as well as the activation energy. The difference between outlet temperature and inlet temperature was higher for the laminar simulation (approximately 4 °C) than for the turbulent one (approximately 0.7 °C). The highest dynamic viscosity values were found at the centre of the pipe (between 0.05 and 0.09 Pa·s), with the lowest values at the wall (0.0076 Pa·s). This behaviour is explained by the pseudoplastic condition of the fruit juice. The activation energy did not yield high values, showing a moderate viscosity variation with the temperature change.MDPI202520252020info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://hdl.handle.net/10578/44484reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésSBPLY/17/180501/000412info:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/444842026-05-27T07:36:41Z
dc.title.none.fl_str_mv Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
title Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
spellingShingle Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
Córcoles Tendero, Juan Ignacio
Computational fluid dynamics
Heat transfer
Non-newtonian fluid
Rheometer
title_short Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
title_full Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
title_fullStr Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
title_full_unstemmed Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
title_sort Heat transfer performance of fruit juice in a heat exchanger tube using numerical simulations
dc.creator.none.fl_str_mv Córcoles Tendero, Juan Ignacio
Marín Alarcón, Ernesto
Almendros Ibáñez, José Antonio
author Córcoles Tendero, Juan Ignacio
author_facet Córcoles Tendero, Juan Ignacio
Marín Alarcón, Ernesto
Almendros Ibáñez, José Antonio
author_role author
author2 Marín Alarcón, Ernesto
Almendros Ibáñez, José Antonio
author2_role author
author
dc.subject.none.fl_str_mv Computational fluid dynamics
Heat transfer
Non-newtonian fluid
Rheometer
topic Computational fluid dynamics
Heat transfer
Non-newtonian fluid
Rheometer
description Enhancing heat transfer rates in heat exchangers is essential in many applications, such as in the food industry. Most fluids used in the food industry are non-Newtonian, whose viscosity is not uniform, and depends on the shear rate and temperature gradient. This is important in the selection of equipment and type of processing. The aim of this work was to numerically simulate, with a non-Newtonian fluid in laminar regime, the heat transfer process in a tube with a curved elbow. The numerical model was validated with published correlations using water as heat transfer fluid. A commercially available fruit juice was used as a non-Newtonian fluid. Its rheological properties were measured using a Modular Compact Rheometer, as well as the activation energy. The difference between outlet temperature and inlet temperature was higher for the laminar simulation (approximately 4 °C) than for the turbulent one (approximately 0.7 °C). The highest dynamic viscosity values were found at the centre of the pipe (between 0.05 and 0.09 Pa·s), with the lowest values at the wall (0.0076 Pa·s). This behaviour is explained by the pseudoplastic condition of the fruit juice. The activation energy did not yield high values, showing a moderate viscosity variation with the temperature change.
publishDate 2020
dc.date.none.fl_str_mv 2020
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10578/44484
url https://hdl.handle.net/10578/44484
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv SBPLY/17/180501/000412
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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