Thermal effects on high-pressure transcritical wall-bounded turbulence

© 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC) license (https://creativecommons.org/licenses/by-nc/4.0/)

Detalles Bibliográficos
Autores: El Mansy, Reda, Barea Sánchez, Guillem, Mellibovsky Elstein, Fernando|||0000-0003-0497-9052, Jofre Cruanyes, Lluís|||0000-0003-2437-259X
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/443490
Acceso en línea:https://hdl.handle.net/2117/443490
https://dx.doi.org/10.1063/5.0296855
Access Level:acceso abierto
Palabra clave:Computational fluid dynamics
Supercritical fluids
Turbulent flow in channels
Dinàmica de fluids
Àrees temàtiques de la UPC::Física::Física de fluids::Flux de fluids
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spelling Thermal effects on high-pressure transcritical wall-bounded turbulenceEl Mansy, RedaBarea Sánchez, GuillemMellibovsky Elstein, Fernando|||0000-0003-0497-9052Jofre Cruanyes, Lluís|||0000-0003-2437-259XComputational fluid dynamicsSupercritical fluidsTurbulent flow in channelsDinàmica de fluidsÀrees temàtiques de la UPC::Física::Física de fluids::Flux de fluids© 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC) license (https://creativecommons.org/licenses/by-nc/4.0/)The sustainment of turbulence under high-pressure transcritical conditions is examined using direct numerical simulations of channel flow subject to various combinations of fluid pressure and wall temperatures. The working fluid is carbon dioxide at supercritical reduced pressures P=Pc∈{1.5, 2, 5}P=Pc∈{1.5,2,5} (the subscript cc denotes the critical value) driven through a channel bounded by differentially heated isothermal walls at reduced temperatures Tcw=Tc∈{0.8, 0.9, 0.95}Tcw=Tc∈{0.8,0.9,0.95} (cold wall) and Thw=Tc∈{1.1, 1.2, 1.4}Thw=Tc∈{1.1,1.2,1.4} (hot wall). The resulting friction Reynolds numbers fall within the ranges Rescw∈[56, 111]Rescw∈[56,111] at the cold wall and Reshw∈[118, 167]Reshw∈[118,167] at the hot wall. The computational domain has dimensions (Lx,Ly,Lz)=(2π, 2, 2π/3)d(Lx,Ly,Lz)=(2π,2,2π/3)d in the streamwise, wall-normal, and spanwise directions, corresponding to a minimal flow unit (dd is the channel half-height). The results show that setting the temperature of the hot wall slightly above the pseudo-boiling point, specifically in the range Thw/Tpb∈[1.01, 1.18]Thw/Tpb∈[1.01,1.18], maximizes the Nusselt number associated with both the hot and cold walls, while the bulk and friction Reynolds numbers peak in the narrower range Thw/Tpb∈[1.01, 1.10]Thw/Tpb∈[1.01,1.10]. Furthermore, both turbulent activity and heat transfer across the channel are found to be highest in the early supercritical regime, with pressures just above critical. These findings highlight the importance of tuning the thermophysical parameters precisely if turbulence is to be sustained and heat transfer enhanced in high-pressure transcritical fluid flows.This work was funded by the European Union (ERC, SCRAMBLE, No. 101040379). Views and opinions expressed are, however, those of the authors only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. The authors acknowledge the support from the SGR program (No. 2021-SGR-01045) of the Generalitat de Catalunya (Catalonia) and the No. PID2023-150840OA-I00 grant of the Agencia Estatal de Investigación (AEI, Spain).Peer Reviewed20252025-10-0720252025-10-10journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/443490https://dx.doi.org/10.1063/5.0296855reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://doi.org/10.13039/501100000780 HE 101040379 Turbulence-On-a-Chip: Supercritically Overcoming the Energy Frontier in MicrofluidicsAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2023-150840OA-I00 RECONSTRUCCION DE DATOS ENRIQUECIDA POR APRENDIZAJE AUTOMATICO DE FLUJO DE FLUIDOS PARA INTERACCION VIRTUAL CON SISTEMAS DE INGENIERIAopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4434902026-05-27T15:37:01Z
dc.title.none.fl_str_mv Thermal effects on high-pressure transcritical wall-bounded turbulence
title Thermal effects on high-pressure transcritical wall-bounded turbulence
spellingShingle Thermal effects on high-pressure transcritical wall-bounded turbulence
El Mansy, Reda
Computational fluid dynamics
Supercritical fluids
Turbulent flow in channels
Dinàmica de fluids
Àrees temàtiques de la UPC::Física::Física de fluids::Flux de fluids
title_short Thermal effects on high-pressure transcritical wall-bounded turbulence
title_full Thermal effects on high-pressure transcritical wall-bounded turbulence
title_fullStr Thermal effects on high-pressure transcritical wall-bounded turbulence
title_full_unstemmed Thermal effects on high-pressure transcritical wall-bounded turbulence
title_sort Thermal effects on high-pressure transcritical wall-bounded turbulence
dc.creator.none.fl_str_mv El Mansy, Reda
Barea Sánchez, Guillem
Mellibovsky Elstein, Fernando|||0000-0003-0497-9052
Jofre Cruanyes, Lluís|||0000-0003-2437-259X
author El Mansy, Reda
author_facet El Mansy, Reda
Barea Sánchez, Guillem
Mellibovsky Elstein, Fernando|||0000-0003-0497-9052
Jofre Cruanyes, Lluís|||0000-0003-2437-259X
author_role author
author2 Barea Sánchez, Guillem
Mellibovsky Elstein, Fernando|||0000-0003-0497-9052
Jofre Cruanyes, Lluís|||0000-0003-2437-259X
author2_role author
author
author
dc.subject.none.fl_str_mv Computational fluid dynamics
Supercritical fluids
Turbulent flow in channels
Dinàmica de fluids
Àrees temàtiques de la UPC::Física::Física de fluids::Flux de fluids
topic Computational fluid dynamics
Supercritical fluids
Turbulent flow in channels
Dinàmica de fluids
Àrees temàtiques de la UPC::Física::Física de fluids::Flux de fluids
description © 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC) license (https://creativecommons.org/licenses/by-nc/4.0/)
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-10-07
2025
2025-10-10
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/443490
https://dx.doi.org/10.1063/5.0296855
url https://hdl.handle.net/2117/443490
https://dx.doi.org/10.1063/5.0296855
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://doi.org/10.13039/501100000780 HE 101040379 Turbulence-On-a-Chip: Supercritically Overcoming the Energy Frontier in Microfluidics
Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2023-150840OA-I00 RECONSTRUCCION DE DATOS ENRIQUECIDA POR APRENDIZAJE AUTOMATICO DE FLUJO DE FLUIDOS PARA INTERACCION VIRTUAL CON SISTEMAS DE INGENIERIA
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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