Skip to Main content Skip to Navigation
Theses

Modélisation et simulation numérique des transferts d'eau, de chaleur et de solutés dans le patrimoine architectural en terre, en relation avec sa dégradation

Abstract : Severe degradation of earthen structures may occur when they are subjected to extreme hydro-climatic conditions, sometimes leading to total failure. This work was carried out as part of the UNESCO program "Central Asian Earth" in cooperation with CRATerre-ENSAG. The ancient wall of Deshan Kala (Khiva, Uzbekistan) was selected for studying the mechanisms of the transfer of water and solute in the soil and the earthen wall. A measuring system was set up to monitor the evolution of the hydro-climatic parameters. The coupled moisture and heat transfer model considers gravity and capillarity for the liquid transport phase and diffusion for the vapor transport phase. The density oh the liquid is variable with respect to solute concentration and the solute is transported by convection-dispersion. The crystallization/dissolution process is a one order reaction. The transfer properties of the materials were estimated in laboratory. The transfer phenomena are numerically modeled. One-dimensional simulations show a dry zone near the surface due to evaporation occuring inside the material. The moisture fluxes and the hydric state of the system are influenced by the water table level and the atmospheric conditions. The salt crystallizes in the dry zone or at the surface depending on the atmospheric conditions and the type of material. Two-dimensional simulations estimate the impact of the soil surface quality and vegetation on moisture fluxes inside the nearby wall. These results are interesting for the conservation of the cultural heritage.
Document type :
Theses
Complete list of metadatas

Cited literature [137 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00373288
Contributor : Olivier Grossein <>
Submitted on : Friday, April 3, 2009 - 5:05:03 PM
Last modification on : Thursday, November 19, 2020 - 3:54:29 PM
Long-term archiving on: : Thursday, June 10, 2010 - 7:43:40 PM

Identifiers

  • HAL Id : tel-00373288, version 1

Collections

Citation

Olivier Grossein. Modélisation et simulation numérique des transferts d'eau, de chaleur et de solutés dans le patrimoine architectural en terre, en relation avec sa dégradation. Hydrologie. Université Joseph-Fourier - Grenoble I, 2009. Français. ⟨tel-00373288⟩

Share

Metrics

Record views

751

Files downloads

16939