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Etude expérimentale du changement de phase liquide-gaz dans un sol
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lozano, A. Cherblanc, Fabien Bénet, Jean-Claude |
| Copyright Year | 2007 |
| Abstract | A macroscopic model of liquid-vapour phase change, based onthe difference of chemical potentials between the liquid and vapour phases contained in the pores, is propo sed. An experiment, creating a thermodynamic non-equilibrium between the liquid and its vapour is descri bed. Two different behaviours of the coefficient L, depending on the vapour pressure, are distinguished : a doma in near the equilibrium and a domain far from the equilibrium. Model proposed reveals three characteristicvalues: a phase change coefficient close to equilibrium, a criterion which characterizes the transition from the lin ear domain to the non-linear domain and a coefficient which represents the velocity with which the vapour pressur e reaches its equilibrium value. The results show that the variation of these values in relation to the soil water co ntent has a characteristic form, which seems to connect them at the same time to the water binding energy and to the liq uid-gas interface surface. Mots-clefs : Changement de phase, potentiel chimique, sol a faible teneur en eau |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://documents.irevues.inist.fr/bitstream/handle/2042/16541/CFM2007-0605.pdf?sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
