Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers

Experimental results of flow pattern and heat transfer in circular-orifice baffled tubes under pure oscillatory flow and compound flow conditions are presented. The hydrogen bubble visualization technique is employed for describing the unsteady flow structure, and particle image velocimetry is used...

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Autores: Muñoz Cámara, José, Crespí Llorens, Damián, Solano, Juan Pedro, Vicente, P.
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Miguel Hernández de Elche
Repositorio:REDIUMH. Depósito Digital de la UMH
OAI Identifier:oai:dspace.umh.es:11000/34158
Acceso en línea:https://hdl.handle.net/11000/34158
Access Level:acceso abierto
Palabra clave:Oscillatory baffled reactors
Flow mixing
Oscillatory flow
PIV
Heat transfer enhancement
CDU::6 - Ciencias aplicadas::62 - Ingeniería. Tecnología
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spelling Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbersMuñoz Cámara, JoséCrespí Llorens, DamiánSolano, Juan PedroVicente, P.Oscillatory baffled reactorsFlow mixingOscillatory flowPIVHeat transfer enhancementCDU::6 - Ciencias aplicadas::62 - Ingeniería. TecnologíaExperimental results of flow pattern and heat transfer in circular-orifice baffled tubes under pure oscillatory flow and compound flow conditions are presented. The hydrogen bubble visualization technique is employed for describing the unsteady flow structure, and particle image velocimetry is used in order to measure the velocity field during eight different phases of the oscillation cycle. The existence of a central jet and the cyclic dispersion of vortices upstream and downstream of the baffles is analyzed. The loss of the flow axisymmetry for Reosc > 130 is clearly identified. Heat transfer measurements under uniform heat flux (UHF) conditions are obtained in a thermal-hydraulic rig, allowing for the description of the influence of net and oscillatory Reynolds numbers on the Nusselt number, using propylene-glycol as working fluid (Pr = 150). The impact of chaotic mixing, for Reosc > 150, results in a uniform local heat transfer distribution along the reactor cell, as well as in thermal uniformity in the transverse plane of the tube.ElsevierDepartamentos de la UMH::Ingeniería Mecánica y Energía202420242021info:eu-repo/semantics/articleapplication/pdf14application/pdfhttps://hdl.handle.net/11000/34158reponame:REDIUMH. Depósito Digital de la UMHinstname:Universidad Miguel Hernández de ElcheIngléshttps://doi.org/10.1016/j.expthermflusci.2020.110324info:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:dspace.umh.es:11000/341582026-05-27T13:36:21Z
dc.title.none.fl_str_mv Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
title Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
spellingShingle Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
Muñoz Cámara, José
Oscillatory baffled reactors
Flow mixing
Oscillatory flow
PIV
Heat transfer enhancement
CDU::6 - Ciencias aplicadas::62 - Ingeniería. Tecnología
title_short Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
title_full Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
title_fullStr Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
title_full_unstemmed Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
title_sort Baffled tubes with superimposed oscillatory flow: Experimental study of the fluid mixing and heat transfer at low net Reynolds numbers
dc.creator.none.fl_str_mv Muñoz Cámara, José
Crespí Llorens, Damián
Solano, Juan Pedro
Vicente, P.
author Muñoz Cámara, José
author_facet Muñoz Cámara, José
Crespí Llorens, Damián
Solano, Juan Pedro
Vicente, P.
author_role author
author2 Crespí Llorens, Damián
Solano, Juan Pedro
Vicente, P.
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamentos de la UMH::Ingeniería Mecánica y Energía
dc.subject.none.fl_str_mv Oscillatory baffled reactors
Flow mixing
Oscillatory flow
PIV
Heat transfer enhancement
CDU::6 - Ciencias aplicadas::62 - Ingeniería. Tecnología
topic Oscillatory baffled reactors
Flow mixing
Oscillatory flow
PIV
Heat transfer enhancement
CDU::6 - Ciencias aplicadas::62 - Ingeniería. Tecnología
description Experimental results of flow pattern and heat transfer in circular-orifice baffled tubes under pure oscillatory flow and compound flow conditions are presented. The hydrogen bubble visualization technique is employed for describing the unsteady flow structure, and particle image velocimetry is used in order to measure the velocity field during eight different phases of the oscillation cycle. The existence of a central jet and the cyclic dispersion of vortices upstream and downstream of the baffles is analyzed. The loss of the flow axisymmetry for Reosc > 130 is clearly identified. Heat transfer measurements under uniform heat flux (UHF) conditions are obtained in a thermal-hydraulic rig, allowing for the description of the influence of net and oscillatory Reynolds numbers on the Nusselt number, using propylene-glycol as working fluid (Pr = 150). The impact of chaotic mixing, for Reosc > 150, results in a uniform local heat transfer distribution along the reactor cell, as well as in thermal uniformity in the transverse plane of the tube.
publishDate 2021
dc.date.none.fl_str_mv 2021
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/11000/34158
url https://hdl.handle.net/11000/34158
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.expthermflusci.2020.110324
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.format.none.fl_str_mv application/pdf
14
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:REDIUMH. Depósito Digital de la UMH
instname:Universidad Miguel Hernández de Elche
instname_str Universidad Miguel Hernández de Elche
reponame_str REDIUMH. Depósito Digital de la UMH
collection REDIUMH. Depósito Digital de la UMH
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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