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A computational continuum model of poroelastic beds
U Lācis1, G A Zampogna2, S Bagheri1
1Linné Flow Centre, Department of Mechanics KTH, 100 44 Stockholm, Sweden.
Proceedings. Mathematical, Physical, and Engineering Sciences
|April 18, 2017
Summary
A new computational tool models fluid flow over porous, elastic materials. This validated model accurately predicts behavior, aiding diverse engineering and scientific fields.
Area of Science:
- Multiphysics
- Computational Mechanics
- Fluid Dynamics
Background:
- Fluid-poroelastic interactions are common but lack validated macroscale models.
- Existing methods struggle to accurately characterize flow over and through these complex materials.
Purpose of the Study:
- To develop and validate a non-empirical continuum model for fluid flow interacting with poroelastic media.
- To create a computational tool for analyzing these complex configurations.
Main Methods:
- Derivation of a continuum model for the poroelastic bed and its interface with free fluid.
- Application of stress continuity and slip velocity conditions at the interface.
- Validation against fully microscopic resolved simulations.
Main Results:
- The effective model accurately captures effects of microstructural anisotropy.
- Predictions are physically consistent and controllable.
- Model performance is validated by microscopic simulations.
Conclusions:
- The proposed computational tool offers a validated macroscale method for fluid-poroelastic interactions.
- This tool has broad applicability in mechanical engineering, bio-engineering, and geophysics.