Finite element mesh generation for numerical simulation of
temperature stratification in hydroelectric reservoir
environments
Leon M. R. de Lima
Universidade do Estado do Rio de Janeiro, Faculdade de Engenharia
20553-013, Rio de Janeiro, RJ
E-mail: [email protected]
Norberto Mangiavacchi
Universidade do Estado do Rio de Janeiro, Faculdade de Engenharia
20553-013, Rio de Janeiro, RJ
E-mail: [email protected]
Cássio B. P. Soares
Departamento de Engenharia Ambiental, FURNAS Centrais Elétricas S.A.
Rio de Janeiro, RJ
E-mail: [email protected]
ABSTRACT
Many factors influence the hydrodynamic
conditions in a hydroelectric power plant
reservoir, and one of them is temperature
stratification, due to its relation with water
density. The chemical balance is also affected,
in a consequence of the species transport, as
well as the biological behavior in the aquatic
system (different forms of life adapt only to a
certain range of temperature).
This paper presents a procedure of finite
element mesh generation for numerical
simulation of the temperature stratification in
hydroelectric
power
plant
reservoir
environments. The numerical modeling is
analogous to the 2dh hydrodynamic models,
but instead of integrating along the height the
integration is performed along the breadth,
constituting a 2db model, which demands a
special treatment for the mesh generation,
combining topological and hydrographic data.
The assembling process includes insertion of
Cartesian points, Delaunay triangulation and
refining routines.
The authors acknowledge the financial support
from FURNAS Centrais Elétricas S.A. for this
research project.
References
[1] P.C.C.
Rosman,
Um
Sistema
Computacional
de
Hidrodinâmica
Ambiental, “in R.C.V. Silva – Métodos
Numéricos em Recursos Hídricos”, ed.
Porto Alegre: ABRH, vol. 5, pp. 1-161,
(2001).
[2] A.A. Saggio, Estudo da Eutrofização do
Reservatório de Barra Bonita (Rio TietêSP) Através de Simulação Numérica,
Escola de Engenharia de São Carlos,
Universidade de São Paulo, pp. 1-10,
1992.