Data/hora: 09/06/2024 11:36:43

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Influence of mass transfer on bubble plume hydrodynamics	
Autores: 	LIMA NETO,IRAN E.; PARENTE,PRISCILA A.B.	
Data: 	2016-03-01	
Ano: 	2016	
Palavras-chave: 	Aeration; Bubbles; Hydrodynamics; Mass transfer; Modeling; Oxygenation.	
Resumo: 	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 demonstrates the importance of taking the momentum amplification factor relationship into account. For deeper water conditions, simulations of bubble dissolution/decompression using the present model and classical models available in the literature resulted in a very good agreement for both aeration and oxygenation processes. Sensitivity analysis showed that the water depth, followed by the bubble size and the flow rate are the most important parameters that affect plume hydrodynamics. Lastly, dimensionless correlations are proposed to assess the impact of mass transfer on plume hydrodynamics, including both the aeration and oxygenation modes.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100411	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201520140453	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.88 n.1 2016	
Fonte: 	info:eu-repo/semantics/openAccess