The effects of small water surfaces on turbulent flow in the atmospheric boundary layer

The effects of small water surfaces on turbulent flow in the atmospheric boundary layer: URANS approach implemented in OpenFOAM

Abbasi, A. (TU Delft Water Resources; Ferdowsi University of Mashhad)
Annor, F.O. (TU Delft Water Resources; Kwame Nkrumah University of Science and Technology)
van de Giesen, N.C. (TU Delft Water Resources)

2018-03-01

A 3-D numerical method is developed to investigate the spatial distribution of surface fluxes over heterogeneous surfaces in (semi-)arid regions. Quantifying the effects of changes in the momentum, thermal and moisture roughness lengths on the airflow and fluxes in the ABL is important for water resources management and local climate studies. The governing equations and turbulence models are modified to include the effects of atmospheric stability conditions on the airflow. The turbulent airflow in ABL is simulated based on the Unsteady Reynolds-Averaged Navier-Stokes (URANS) approach to understand the air flow over the non-homogeneous surfaces from dry land through the water surface and vice versa. The model can be used to study airflow in neutral and non-neutral ABL over complex and non-homogeneous surfaces. The model results were used to investigate the flow parameters and (heat) flux variations over small water surfaces considering its surrounding conditions.

ABL
OpenFOAM
Roughness lengths
Small water surface
Stability condition
URANS

http://resolver.tudelft.nl/uuid:ab6cd304-8f08-407b-941e-fe38cfd84649

https://doi.org/10.1016/j.envsoft.2017.12.013

2018-07-10

1364-8152

Environmental Modelling & Software, 101, 268-288

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2018 A. Abbasi, F.O. Annor, N.C. van de Giesen