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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : 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(1) & PANAYOTIS PRINOS(2)
ABSTRACT
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 ĘC 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 : 1,591,003 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 13/08/2015
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