Influence of mass transfer on bubble plume hydrodynamics
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| Format: | Artículo científico |
| Langue: | en |
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Academia Brasileira de Ciências
2016
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| _version_ | 1876438639586574336 |
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| author | IRAN E. LIMA NETO |
| author_facet | IRAN E. LIMA NETO |
| contents | Influence of mass transfer on bubble plume hydrodynamics IRAN E. LIMA NETO PRISCILA A.B. PARENTE Multidisciplinaria (Ciencias Naturales y Exactas) bubbles Aeration modeling oxygenation hydrodynamics 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. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32744812035 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88 |
| format | Artículo científico |
| id | redalyc_32744812035 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Influence of mass transfer on bubble plume hydrodynamics IRAN E. LIMA NETO Multidisciplinaria (Ciencias Naturales y Exactas) bubbles Aeration modeling oxygenation hydrodynamics Influence of mass transfer on bubble plume hydrodynamics IRAN E. LIMA NETO PRISCILA A.B. PARENTE Multidisciplinaria (Ciencias Naturales y Exactas) bubbles Aeration modeling oxygenation hydrodynamics 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. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32744812035 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88 |
| title | Influence of mass transfer on bubble plume hydrodynamics |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) bubbles Aeration modeling oxygenation hydrodynamics |
| url | https://www.redalyc.org/articulo.oa?id=32744812035 |