Assessment of acceleration modelling for fluid-filled porous media subjected to dynamic loading
| Autor: | Kenneth Runesson, Nils-Erik Wiberg, Bernd Lenhof, Per Kettil |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Poromechanics Computational Mechanics Mechanics Geotechnical Engineering and Engineering Geology Dynamic load testing Finite element method Physics::Fluid Dynamics Acceleration Mechanics of Materials Dynamic loading Compressibility General Materials Science Geotechnical engineering Material properties Porous medium |
| Zdroj: | International Journal for Numerical and Analytical Methods in Geomechanics. 32:109-119 |
| ISSN: | 1096-9853 0363-9061 |
| DOI: | 10.1002/nag.610 |
| Popis: | The purpose of this paper is to examine the importance of different possible simplifying approximations when performing numerical simulations of fluid-filled porous media subjected to dynamic loading. In particular, the relative importance of the various acceleration terms for both the solid and the fluid, especially the convective contribution, is assessed. The porous medium is modelled as a binary mixture of a solid phase, in the sense of a porous skeleton, and a fluid phase that represents both liquid and air in the pores. The solid particles are assumed to be intrinsically incompressible, whereas the fluid is assigned a finite intrinsic compressibility. Finite element (FE) simulations are carried out while assuming material properties and loading conditions representative for a road structure. The results show that, for the range of the material data used in the simulations, omitting the relative acceleration gives differences in the solution of the seepage velocity field, whereas omitting only the convective term does not lead to significant differences. |
| Databáze: | OpenAIRE |
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