2026-09-14T06:00:13Zhttps://gredos.usal.es/oai/request
oai:gredos.usal.es:10366/1594862025-04-30T20:18:35Zcom_10366_4377com_10366_4349com_10366_3946com_10366_3823col_10366_4378
Gestión del Repositorio Documental de la Universidad de Salamanca author Hernández Blázquez, Borja author Martín Martín, Mariano author Gupta, Prashant 2024-09-10T07:59:02Z 2024-09-10T07:59:02Z 2021 Hernandez, B., Martín, M., & Gupta, P. (2021). Numerical study of airflow regimes and instabilities produced by the swirl generation chamber in counter-current spray dryers. Chemical Engineering Research and Design, 176, 89-101. https://doi.org/10.1016/j.cherd.2021.09.024 0263-8762 http://hdl.handle.net/10366/159486 10.1016/j.cherd.2021.09.024 [EN] In this work a CFD numerical study is performed to evaluate the influence of the geometry of the swirl generation chamber on the flow behaviour, the swirl intensity and the unstable oscillations in the airflow pattern. The study shows four different regimes for the flow, separated by three critical swirl intensities. The first one is used to identify the formation of the vortex breakdown. The second one makes a distinction between a free and a wall governed vortex. For a free vortex the instabilities ofthe flow pattern decrease when the swirl intensity increases showing a negative power correlation between them. However, in a wall governed vortex the instabilities do not correlate with the swirl intensity, being uncontrollable. The third critical swirl intensity indicates the formation of a backflow region near the walls at the bottom zone of the dryer but without impacting the top cylindrical part of the chamber. eng Attribution-NonCommercial-NoDerivatives 4.0 Internacional Swirl flow Precessing vortex core Computational fluid dynamics Spray drying Numerical study of airflow regimes and instabilities produced by the swirl generation chamber in counter-current spray dryers info:eu-repo/semantics/article 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 URL https://gredos.usal.es/bitstream/10366/159486/1/DIQT_Numerical%20study%20of%20airflow%20regimes.pdf File MD5 d74e0574f59a8a934c32b3e4610b6748 1658718 application/pdf DIQT_Numerical study of airflow regimes.pdf URL https://gredos.usal.es/bitstream/10366/159486/4/DIQT_Numerical%20study%20of%20airflow%20regimes.pdf.txt File MD5 529a27fe054751cb61cca9305406b249 70761 text/plain DIQT_Numerical study of airflow regimes.pdf.txt