CFD simulation of air-sparged slug flow in the flat-sheet membrane: A concentration polarization study
| Autor: | Ahmad Golrokh Sani, Seyedeh Shakiba Azimi, Hamidreza Najafi |
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| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Bubble Flow (psychology) Flux Filtration and Separation 02 engineering and technology Mechanics Permeation 021001 nanoscience & nanotechnology Slug flow Analytical Chemistry Physics::Fluid Dynamics 020401 chemical engineering 0204 chemical engineering 0210 nano-technology Scaling Concentration polarization |
| Zdroj: | Separation and Purification Technology. 270:118816 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2021.118816 |
| Popis: | In this study, CFD simulation of the air-sparged two-phase slug flow inside the flat-sheet membrane channel was performed using a novel approach. The model consists of the Level-Set equation to capture the bubble-water-membrane flow hydrodynamics and a modified convection–diffusion formulation to account for the solute transport. The effects of slug bubble motion on the variation of Concentration Polarization (CP) and permeation flux are studied in detail in the absence of biofouling and scaling. The variation of flow and concentration fields in the membrane channel, particularly near the membrane surface, is illustrated and discussed. According to the simulation results, for the two-phase slug-flow regime inside the membrane channel, the average relative error was improved from 17.82% in the previously proposed two-fluid bubbly-flow model to 1.82% in the present work. |
| Databáze: | OpenAIRE |
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