Author(s): Papaioannou Vassilios; Prinos Panagiotis

Linked Author(s): Panagiotis Prinos

Keywords: Convective currents; Solar radiation; Vegetation; Numerical modeling

Abstract: Convective currents between open water and vegetation, due to solar radiation are investigated numerically. The layer, representing the vegetation, covers half of the tank and contains an array of rigid circular cylinders with porosity φ. The unsteady two-dimensional Volume-Averaged Navier-Stokes (VANS) equations are used which include an additional drag term due to the presence of the vegetation. The energy equation is also solved, in which the absorption of radiation is considered through an additional term. One radiation model is being implemented, based on the radiative transfer equation (RTE). The Boussinesq approximation is applied for considering the density difference due to temperature difference in the buoyancy term. Numerical results for the current velocity and water temperature profile are presented for porosity φ ranging from 0.97 up to 0.72 in the vegetated area. The results are compared against available experimental data.

DOI: https://doi.org/10.3850/978-981-11-2731-1_109-cd

Year: 2018