IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 2- HYDRO-ENVIRONMENT : NUMERICAL SIMULATION OF THERMALLY DRIVEN EXCHANGE FLOW BETWEEN OPEN WATER AND AQUATIC CANOPIES
NUMERICAL SIMULATION OF THERMALLY DRIVEN EXCHANGE FLOW BETWEEN OPEN WATER AND AQUATIC CANOPIES
Author : MARIA TSAKIRI & PANAYOTIS PRINOS
In the present study, thermally driven exchange flow between open water and rigid emergent vegetation, due to different radiation absorption, is investigated numerically. The unsteady Navier ? Stokes equations and the energy equation are solved with the Fluent CFD code. The effect of vegetation is taken into account through additional terms, which are based on the porous media theory, in the momentum equations and the absorption of radiation through additional term in the energy equation. These terms are included in the model through User Defined Functions. The Boussinesq model is used for taking into account the density difference due to temperature difference. Three cases with different vegetation porosity are examined (n = 0.97, 0.92, 0.85) and one case without vegetation for comparison purposes. Numerical results for the velocities and the heights of the currents as well as for the temperature differences are presented and are compared with available experimental data. The velocity of the current is found to be almost constant and it decreases with decreasing vegetation porosity.
File Size : 1,790,924 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 2- HYDRO-ENVIRONMENT
Date Published : 18/04/2016
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