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	Provedor de dados 42 (3) Autor LIMA NETO,IRAN E. (3) ARAÚJO,GERMÁRIO M. (1) BECKER,HELENA (1) PARENTE,PRISCILA A.B. (1) Palavra-chave Aeration (2) Bubble plumes (1) Bubbles (1) Diffuse pollution (1) Eutrophication (1) Evaporation (1) Hydrodynamics (1) Lakes (1) Mass transfer (1) Modeling (1) Nutrients (1) Oxygenation (1) Semiarid (1) Stratification (1) Urbanization (1) Water quality modeling (1) Water yield (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2019 (2) 2016 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Influence of mass transfer on bubble plume hydrodynamics 42 LIMA NETO,IRAN E.; PARENTE,PRISCILA A.B.. ABSTRACT This paper presents an integral model to evaluate the impact of gas transfer on the hydrodynamics of bubble plumes. The model is based on the Gaussian type self-similarity and functional relationships for the entrainment coefficient and factor of momentum amplification due to turbulence. The impact of mass transfer on bubble plume hydrodynamics is investigated considering different bubble sizes, gas flow rates and water depths. The results revealed a relevant impact when fine bubbles are considered, even for moderate water depths. Additionally, model simulations indicate that for weak bubble plumes (i.e., with relatively low flow rates and large depths and slip velocities), both dissolution and turbulence can affect plume hydrodynamics, which... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeration; Bubbles; Hydrodynamics; Mass transfer; Modeling; Oxygenation. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100411 Impact of artificial destratification on water availability of reservoirs in the Brazilian semiarid 42 LIMA NETO,IRAN E.. Abstract: Field surveys and integral modelling were carried out to study the effect of bubble plumes on the flow hydrodynamics and the time-evolution of water temperature profiles in a shallow lake with maximum depth of about 4 m. Then, model simulations were performed to verify the feasibility of destratification of ten water-supply reservoirs with capacities of 10-2,000 hm3. Finally, hydrological modelling was conducted to assess the impact of destratification on evaporation suppression and its effects on reservoir yield. The results indicate that net temperature reductions of the order of 1.0°C can be obtained, which corresponds to evaporation suppressions of approximately 10%. In turn, this resulted in increases in the regulated flow of 2-12% that... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeration; Evaporation; Bubble plumes; Lakes; Stratification; Water yield. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500904 Phosphorus dynamics in a highly polluted urban drainage channel-shallow reservoir system in the Brazilian semiarid 42 ARAÚJO,GERMÁRIO M.; LIMA NETO,IRAN E.; BECKER,HELENA. Abstract: This paper investigates phosphorus dynamics in a highly polluted system composed of a drainage channel followed by a shallow reservoir in the city of Fortaleza, Brazilian semiarid. During the dry season, significant non-point source loads of total phosphorus originated from residences unconnected to sewers were identified along the channel, resulting in an increasing flow rate of untreated sewage towards the reservoir. During the rainy season, as a consequence of dilution, phosphorus concentrations decreased by about 5-fold. The results also revealed that the reservoir was acting similarly to a waste stabilization pond, with phosphorus removal efficiency of about 33%. Assuming one-dimensional flow for the channel and complete mixing for the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diffuse pollution; Eutrophication; Nutrients; Semiarid; Urbanization; Water quality modeling. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500902 Registros recuperados: 3 Primeira ... 1 ... Última

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