Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed
In this paper, droplet vaporization dynamics in a heated bubbling fluidized bed was studied. A volatile hydrocarbon liquid jet comprising acetone was injected into a hot bubbling fluidized bed of Geldart A-type glass ballotini particles heated at 150 °C, well above the saturation temperature of acet...
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MDPI AG
2025-01-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/10/1/19 |
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| author | Subhasish Mitra Geoffrey M. Evans |
| author_facet | Subhasish Mitra Geoffrey M. Evans |
| author_sort | Subhasish Mitra |
| collection | DOAJ |
| description | In this paper, droplet vaporization dynamics in a heated bubbling fluidized bed was studied. A volatile hydrocarbon liquid jet comprising acetone was injected into a hot bubbling fluidized bed of Geldart A-type glass ballotini particles heated at 150 °C, well above the saturation temperature of acetone (56 °C). Intense interactions were observed among the evaporating droplets and hot particles during contact with the re-suspension of particles due to a release of vapour. A non-intrusive schlieren imaging method was used to track the hot air and vapour mixture plume in the freeboard region of the bed and the acetone vapour fraction therein was mapped. The jet vaporization dynamics in the bubbling fluidized bed was modelled in a Eulerian–Lagrangian CFD (computational fluid dynamics) modelling framework involving heat and mass transfer sub models. The CFD model indicated a dispersion of the vapour plume from the evaporating droplets which was qualitatively compared with the schlieren images. Further, the CFD simulation predicted a significant reduction (~60 °C) in the local bed temperature at the point of the jet injection, which was indirectly confirmed in an experiment by the presence of particle agglomerates. |
| format | Article |
| id | doaj-art-e0f253ed4e31438c81a7cd58f58c9f31 |
| institution | Kabale University |
| issn | 2311-5521 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Fluids |
| spelling | doaj-art-e0f253ed4e31438c81a7cd58f58c9f312025-01-24T13:32:37ZengMDPI AGFluids2311-55212025-01-011011910.3390/fluids10010019Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized BedSubhasish Mitra0Geoffrey M. Evans1Discipline of Chemical Engineering, School of Engineering, University of Newcastle, Callaghan, NSW 2308, AustraliaDiscipline of Chemical Engineering, School of Engineering, University of Newcastle, Callaghan, NSW 2308, AustraliaIn this paper, droplet vaporization dynamics in a heated bubbling fluidized bed was studied. A volatile hydrocarbon liquid jet comprising acetone was injected into a hot bubbling fluidized bed of Geldart A-type glass ballotini particles heated at 150 °C, well above the saturation temperature of acetone (56 °C). Intense interactions were observed among the evaporating droplets and hot particles during contact with the re-suspension of particles due to a release of vapour. A non-intrusive schlieren imaging method was used to track the hot air and vapour mixture plume in the freeboard region of the bed and the acetone vapour fraction therein was mapped. The jet vaporization dynamics in the bubbling fluidized bed was modelled in a Eulerian–Lagrangian CFD (computational fluid dynamics) modelling framework involving heat and mass transfer sub models. The CFD model indicated a dispersion of the vapour plume from the evaporating droplets which was qualitatively compared with the schlieren images. Further, the CFD simulation predicted a significant reduction (~60 °C) in the local bed temperature at the point of the jet injection, which was indirectly confirmed in an experiment by the presence of particle agglomerates.https://www.mdpi.com/2311-5521/10/1/19bubbling fluidized bedliquid injectiondropletevaporationCFD modellingschlieren imaging |
| spellingShingle | Subhasish Mitra Geoffrey M. Evans Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed Fluids bubbling fluidized bed liquid injection droplet evaporation CFD modelling schlieren imaging |
| title | Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed |
| title_full | Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed |
| title_fullStr | Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed |
| title_full_unstemmed | Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed |
| title_short | Vaporization Dynamics of a Volatile Liquid Jet on a Heated Bubbling Fluidized Bed |
| title_sort | vaporization dynamics of a volatile liquid jet on a heated bubbling fluidized bed |
| topic | bubbling fluidized bed liquid injection droplet evaporation CFD modelling schlieren imaging |
| url | https://www.mdpi.com/2311-5521/10/1/19 |
| work_keys_str_mv | AT subhasishmitra vaporizationdynamicsofavolatileliquidjetonaheatedbubblingfluidizedbed AT geoffreymevans vaporizationdynamicsofavolatileliquidjetonaheatedbubblingfluidizedbed |