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| LIMA,RÔMULO C.; MESQUITA,ANDRÉ L.A.; BLANCO,CLAUDIO J.C.; SANTOS,MARIA DE LOURDES S.; SECRETAN,YVES. |
| ABSTRACTIn Belém city is located the potable water supply system of its metropolitan area, which includes, in addition to this city, four more municipalities. In this water supply complex is the Água Preta lake, which serves as a reservoir for the water pumped from the Guamá river. Due to the great importance of this lake for this system, several works have been devoted to its study, from the monitoring of the quality of its waters to its hydrodynamic modeling. This paper presents the results obtained by computer simulation of the phosphorus dispersion within this reservoir by the numerical solution of two-dimensional equation of advection-diffusion-reaction by the method θ/SUPG. Comparing these results with data concentration of total phosphorus collected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphorus dispersion; Advection-diffusion-reaction equation; Θ/SUPG-method; Finite elements. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401505 |
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| BARBOSA,DISTERFANO L.M.; VAZ,JERSON R.P.; FIGUEIREDO,SÁVIO W.O.; SILVA,MARCELO DE OLIVEIRA E; LINS,ERB F.; MESQUITA,ANDRÉ L.A.. |
| The Diffuser Augmented Wind Turbines (DAWTs) have been widely studied, since the diffusers improve the power coefficient of the wind turbine, particularly of small systems. The diffuser is a device which has the function of causing an increase on the flow velocity through the wind rotor plane due to pressure drop downstream, therefore resulting in an increase of the rotor power coefficient. This technology aids the turbine to exceed the Betz limit, which states that the maximum kinetic energy extracted from the flow is 59.26%. Thus, the present study proposes a mathematical model describing the behavior of the internal velocity for three conical diffusers, taking into account the characteristics of flow around them. The proposed model is based on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DAWTs; Diffusers; Wind energy; Biot-Savart's law. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000201133 |
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