QUIET AEROFOIL WITH ADAPTIVE POROUS SURFACES
Lead Research Organisation:
City, University of London
Department Name: Sch of Engineering and Mathematical Sci
Abstract
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Organisations
Publications
Nicholas S
(2023)
The role of the in-plane solidity on canopy flows
in Journal of Fluid Mechanics
| Title | Modelling turbulent flow over porous, anisotropic walls: a framework for high-fidelity, parallel simulations. |
| Description | To be able to tackle the direct numerical simulations (DNS) of a turbulent channel flow over porous, anisotropic walls, we use a two-domains approach. In the fluid region, the flow is approximated using a finite volume discretisation of the incompressible Navier-Stokes (NS) equations. In the porous layers the volume-averaged Navier-Stokes (VANS) equations are used. These are obtained by volume-averaging the microscopic flow field over a small volume that is larger than the typical dimensions of the pores. In this way the porous medium has a continuum description, and can be specified without the need of a detailed knowledge of the pore microstructure by independently assigning permeability and porosity. At the interface between the porous material and the fluid region, momentum-transfer conditions are applied, in which an available coefficient related to the unknown structure of the interface can be used as an error estimate. This methodology is implemented in SUSA, the parallel code used in the context of this project. Special care is also devoted to the efficient parallelisation of the method. |
| Type Of Material | Computer model/algorithm |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| Impact | So far, the method has been restricted to very simple toy problems. We have now extended to flow around wings. This procedure allows to simulate at DNS level the turbulent flows on porous surfaces keeping into account eventual anisotropic structure of the permeability tensor without dealing with the micropores topology. This approach will be validated versus fully resolved (at pore scale) simulations on simplified scenarios. |
| URL | https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/abs/turbulent-channel-flo... |