Graduate Program of Mechanical Engineering - State University of Rio de Janeiro (UERJ) Laboratory: Group for Studies and Environmental Simulations in Water Reservoir - GESAR Rua Fonseca Teles, 121, Rio de Janeiro, CEP 20940-903 RJ - Brazil Phone: +55 (21) 2332-4733 E-mail: daniel.chalhub@eng.uerj.br