# A computational continuum model of poroelastic beds

## TL;DR

This paper introduces a validated continuum model for poroelastic beds that accurately predicts fluid-structure interactions at the macroscale, validated against microscopic simulations, and applicable across various engineering fields.

## Contribution

The paper develops and validates a non-empirical continuum model for poroelastic beds, capturing microstructural effects and interface behaviors accurately.

## Key findings

- Effective model captures microstructure anisotropy effects
- Model predictions agree with microscopic simulations
- Applicable to diverse fields like bio-engineering and geophysics

## Abstract

Despite the ubiquity of fluid flows interacting with porous and elastic materials, we lack a validated non-empirical macroscale method for characterizing the flow over and through a poroelastic medium. We propose a computational tool to describe such configurations by deriving and validating a continuum model for the poroelastic bed and its interface with the above free fluid. We show that, using stress continuity condition and slip velocity condition at the interface, the effective model captures the effects of small changes in the microstructure anisotropy correctly and predicts the overall behaviour in a physically consistent and controllable manner. Moreover, we show that the performance of the effective model is accurate by validating with fully microscopic resolved simulations. The proposed computational tool can be used in investigations in a wide range of fields, including mechanical engineering, bio-engineering and geophysics.