Basal melting driven by turbulent thermal convection
International audience Melting and solidification processes in the presence of convection are key to many geophysical problems. An essentialquestion related to these phenomena concerns the estimation of the time-evolving melting rate, which is tightly connectedto the turbulent convective dynamics in...
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ftccsdartic:oai:HAL:hal-04401715v1 2024-02-27T08:38:21+00:00 Basal melting driven by turbulent thermal convection Rabbanipour Esfahani, Babak Hirata, Silvia, C Berti, Stefano Calzavarini, Enrico Unité de Mécanique de Lille - ULR 7512 (UML) Université de Lille Laboratoire de Mécanique de Lille - FRE 3723 (LML) Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS) Enschede, Netherlands 2018-05-14 https://hal.science/hal-04401715 en eng HAL CCSD hal-04401715 https://hal.science/hal-04401715 INTERNATIONAL CONFERENCE ON RAYLEIGH BÉNARD TURBULENCE https://hal.science/hal-04401715 INTERNATIONAL CONFERENCE ON RAYLEIGH BÉNARD TURBULENCE, May 2018, Enschede, Netherlands [NLIN]Nonlinear Sciences [physics] info:eu-repo/semantics/conferenceObject Conference papers 2018 ftccsdartic 2024-01-28T00:06:25Z International audience Melting and solidification processes in the presence of convection are key to many geophysical problems. An essentialquestion related to these phenomena concerns the estimation of the time-evolving melting rate, which is tightly connectedto the turbulent convective dynamics in the bulk of the melt fluid and the heat transfer at the liquid-solid interface. In thistalk, we consider a convective-melting model, constructed as a generalization of the Rayleigh-Bénard system, accountingfor the basal melting of a solid. As the change of phase proceeds, an unstably-stratified fluid layer grows at the heatedbottom of the system and eventually reaches a turbulent convection state. By means of extensive numerical simulations,we explore the model dynamics in two and three-dimensional configurations (fig. 84). The focus of our analysis is onthe scaling of global quantities as well as on the interface morphology and the effects of space dimensionality. We findthat independently of dimensionality the convective-melting system behavior shares strong resemblances with that ofthe Rayleigh-Bénard one, and that the heat flux is only weakly enhanced with respect to that case. Such similarities areunderstood, at least to some extent, considering the resulting slow motion of the melting front (with respect to the turbulentfluid velocity fluctuations) and its generally little roughness (compared to the height of the fluid layer). Varying the Stefannumber, accounting for the thermodynamical properties of the material, also seems to have only a mild effect, whichimplies the possibility to extrapolate results in numerically delicate low-Stefan setups from more convenient high-Stefanones [1]. Finally, we discuss possible extensions of the study to geophysically relevant problems such as the modeling ofthe evolution of melt-ponds at the surface of Arctic sea-ice. Conference Object Arctic Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[NLIN]Nonlinear Sciences [physics] |
spellingShingle |
[NLIN]Nonlinear Sciences [physics] Rabbanipour Esfahani, Babak Hirata, Silvia, C Berti, Stefano Calzavarini, Enrico Basal melting driven by turbulent thermal convection |
topic_facet |
[NLIN]Nonlinear Sciences [physics] |
description |
International audience Melting and solidification processes in the presence of convection are key to many geophysical problems. An essentialquestion related to these phenomena concerns the estimation of the time-evolving melting rate, which is tightly connectedto the turbulent convective dynamics in the bulk of the melt fluid and the heat transfer at the liquid-solid interface. In thistalk, we consider a convective-melting model, constructed as a generalization of the Rayleigh-Bénard system, accountingfor the basal melting of a solid. As the change of phase proceeds, an unstably-stratified fluid layer grows at the heatedbottom of the system and eventually reaches a turbulent convection state. By means of extensive numerical simulations,we explore the model dynamics in two and three-dimensional configurations (fig. 84). The focus of our analysis is onthe scaling of global quantities as well as on the interface morphology and the effects of space dimensionality. We findthat independently of dimensionality the convective-melting system behavior shares strong resemblances with that ofthe Rayleigh-Bénard one, and that the heat flux is only weakly enhanced with respect to that case. Such similarities areunderstood, at least to some extent, considering the resulting slow motion of the melting front (with respect to the turbulentfluid velocity fluctuations) and its generally little roughness (compared to the height of the fluid layer). Varying the Stefannumber, accounting for the thermodynamical properties of the material, also seems to have only a mild effect, whichimplies the possibility to extrapolate results in numerically delicate low-Stefan setups from more convenient high-Stefanones [1]. Finally, we discuss possible extensions of the study to geophysically relevant problems such as the modeling ofthe evolution of melt-ponds at the surface of Arctic sea-ice. |
author2 |
Unité de Mécanique de Lille - ULR 7512 (UML) Université de Lille Laboratoire de Mécanique de Lille - FRE 3723 (LML) Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Rabbanipour Esfahani, Babak Hirata, Silvia, C Berti, Stefano Calzavarini, Enrico |
author_facet |
Rabbanipour Esfahani, Babak Hirata, Silvia, C Berti, Stefano Calzavarini, Enrico |
author_sort |
Rabbanipour Esfahani, Babak |
title |
Basal melting driven by turbulent thermal convection |
title_short |
Basal melting driven by turbulent thermal convection |
title_full |
Basal melting driven by turbulent thermal convection |
title_fullStr |
Basal melting driven by turbulent thermal convection |
title_full_unstemmed |
Basal melting driven by turbulent thermal convection |
title_sort |
basal melting driven by turbulent thermal convection |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-04401715 |
op_coverage |
Enschede, Netherlands |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
INTERNATIONAL CONFERENCE ON RAYLEIGH BÉNARD TURBULENCE https://hal.science/hal-04401715 INTERNATIONAL CONFERENCE ON RAYLEIGH BÉNARD TURBULENCE, May 2018, Enschede, Netherlands |
op_relation |
hal-04401715 https://hal.science/hal-04401715 |
_version_ |
1792045258331127808 |