Inclusion of chemical effect in a fully coupled THM finite element code

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
This publication is imported from Aalto University research portal.
View publication in the Research portal
View/Open full text file from the Research portal
Date
2018
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
827-832
Series
Unsaturated Soils, Volume 2
Abstract
Bentonite-rich clays can be used as a buffer / backfill material in deep geological repositories for nuclear waste. The prediction of the long-term performance of a buffer / backfill in such a complex environment, where the temperature, humidity and chemistry of water change, requires a fully thermo-hydro-mechanical-chemical (THMC) coupled numerical code. This paper presents a simple extension of a THM coupled finite element code to include chemical effects. After deriving the governing salt mass balance equation and discussing its implementation into the code, the paper verifies the extended framework against analytical solution for 1D salt transport. In addition, the article presents a validation example in which the code replicates experimental data. The numerical results obtained from the extended THMC coupled finite element code encourage further investigation of the chemical effects on the mechanical and thermal behaviour of the material. That would serve the ultimate goal of achieving a safer design ofthe nuclear waste storage facility.
Description
Keywords
Other note
Citation
Abed , A , Sołowski , W T , Romero , E & Gens , A 2018 , Inclusion of chemical effect in a fully coupled THM finite element code . in C Ng , A Leung , A Chiu & C Zhou (eds) , Unsaturated Soils . vol. 2 , Hong Kong University of Science and Technology , Hong Kong , pp. 827-832 , International Conference on Unsaturated Soils , Hong Kong , Hong Kong , 03/08/2018 .