@article{silva_2001,  title={Hydrodynamics Characteristics and Gas-Liquid Mass Transfer in a Three Phase Fluidized Bed Reactor},  volume={23},  ISSN={0100-7386},  url={https://doi.org/10.1590/S0100-73862001000400011},  DOI={10.1590/S0100-73862001000400011},  number={4},  journal={Journal of the Brazilian Society of Mechanical Sciences},  publisher={The Brazilian Society of Mechanical Sciences},  author={Silva, Edson L.},  year={2001},  pages={503–512} }