La modélisation du transfert d'eau dans un sol à faible teneur en eau (domaine pendulaire et hygroscopique) proposée s'appuie sur l'idée d'un changement de phase liquide–gaz accompagné d'un transfert en phase gazeuse. Le modèle de changement de phase développé introduit un coefficient phénoménologique déterminé lors d'une étude expérimentale de volatilisation sur des échantillons centimétriques. Dans un deuxième temps, des simulations numériques basées sur le modèle de transfert sont comparées aux cinétiques expérimentales de séchage d'un échantillon macroscopique. Le bon accord obtenu conforte l'hypothèse d'un transport en phase gazeuse associé à un changement de phase avec non-équilibre thermodynamique liquide–gaz.
The description of water transport in soil at low water content proposed is based on the idea that liquid–gas phase change occurs with vapor diffusion in the gas phase. The phase change modelisation introduces a phenomenological coefficient characterized through an experimental investigation done on small-scale soil samples. Then, numerical simulations are compared to experimental drying kinetics carried out on macroscopic soil samples. Good agreement is obtained, which strengthens the hypothesis of transport in the gas phase associated with a non-equilibrium liquid–gas phase change.
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Keywords: Granular media, Soils, Porous media, Water transport, Phase change, Dry soil, Evaporation
Ali Chammari 1 ; Betaboale Naon 2 ; Fabien Cherblanc 1 ; Jean-Claude Bénet 1
@article{CRMECA_2003__331_11_759_0,
author = {Ali Chammari and Betaboale Naon and Fabien Cherblanc and Jean-Claude B\'enet},
title = {Transfert d'eau en sol aride avec changement de phase},
journal = {Comptes Rendus. M\'ecanique},
pages = {759--765},
publisher = {Elsevier},
volume = {331},
number = {11},
year = {2003},
doi = {10.1016/j.crme.2003.07.005},
language = {fr},
}
TY - JOUR AU - Ali Chammari AU - Betaboale Naon AU - Fabien Cherblanc AU - Jean-Claude Bénet TI - Transfert d'eau en sol aride avec changement de phase JO - Comptes Rendus. Mécanique PY - 2003 SP - 759 EP - 765 VL - 331 IS - 11 PB - Elsevier DO - 10.1016/j.crme.2003.07.005 LA - fr ID - CRMECA_2003__331_11_759_0 ER -
Ali Chammari; Betaboale Naon; Fabien Cherblanc; Jean-Claude Bénet. Transfert d'eau en sol aride avec changement de phase. Comptes Rendus. Mécanique, Volume 331 (2003) no. 11, pp. 759-765. doi : 10.1016/j.crme.2003.07.005. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2003.07.005/
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