Samenvatting
Superabsorbent polymers (SAPs) are cross-linked polymer networks with large negatively charged ion groups attached to the solid matrix (polymer chains). By the presence of these large negatively charged ion groups, Donnan osmotic pressure difference rises in and outside of the gel. The Donnan osmotic pressure difference is, as a matter of fact, the main cause for the exceptional swelling ability of SAPs. In this study, we present a dynamic mixed hybrid finite element (MHFE) model in three dimensional setting for the simulation of the finite swelling of SAPs. In this model, the normal flux is approximated using Raviart-Thomas elements, which conserve mass both locally and globally. The solid part is assumed to be isotropic and hyperelastic under isothermal conditions. The transient simulation results are verified with a semi-analytical solution in one dimension; while the 3D equilibrium results in the case of a spherical geometry are verified against the analytical solutions.
Originele taal-2 | Engels |
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Titel | Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics |
Plaats van productie | Reston |
Uitgeverij | American Society of Civil Engineers |
Pagina's | 362-369 |
Aantal pagina's | 8 |
ISBN van elektronische versie | 9780784480779 |
DOI's | |
Status | Gepubliceerd - 1 jan. 2017 |
Evenement | 6th Biot Conference on Poromechanics - Ecole des Ponts ParisTech and IFSTTAR, Paris, Frankrijk Duur: 9 jul. 2017 → 13 jul. 2017 https://biot2017.sciencesconf.org |
Congres
Congres | 6th Biot Conference on Poromechanics |
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Verkorte titel | BIOT 6 |
Land/Regio | Frankrijk |
Stad | Paris |
Periode | 9/07/17 → 13/07/17 |
Internet adres |
Financiering
The authors acknowledge the financial support from the Technology Foundation STW, the technological branch of the Netherlands Organization of Scientific Research and the Ministry of Economic Affairs (project number 12538).