Transitory powder flow dynamics during emptying of a continuous mixer
| Autor: | Henri Berthiaux, Jean-Louis Dirion, Chawki Ammarcha, Michel Cabassud, Mizonov Vadim E, Cendrine Gatumel |
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| Přispěvatelé: | Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Ivanovo State Power Engineering University (RUSSIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement (RAPSODEE), Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire de génie chimique [ancien site de Basso-Cambo] (LGC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Department of Applied Mathematics (Ivanovo, Russie), Institut National Polytechnique de Toulouse - INPT (FRANCE) |
| Rok vydání: | 2013 |
| Předmět: |
Semi-batch mixing
Work (thermodynamics) Engineering General Chemical Engineering Markov chain Matrix representation Flow (psychology) Energy Engineering and Power Technology 02 engineering and technology Powder Industrial and Manufacturing Engineering [CHIM.GENI]Chemical Sciences/Chemical engineering 020401 chemical engineering Génie chimique Transitory regime 0204 chemical engineering Simulation business.industry Process Chemistry and Technology Dynamics (mechanics) Process (computing) Rotational speed General Chemistry Mechanics 021001 nanoscience & nanotechnology Outflow 0210 nano-technology business |
| Zdroj: | Chemical Engineering and Processing: Process Intensification Chemical Engineering and Processing: Process Intensification, Elsevier, 2013, vol. 65, pp.68-75. ⟨10.1016/j.cep.2012.12.004⟩ |
| ISSN: | 0255-2701 |
| DOI: | 10.1016/j.cep.2012.12.004 |
| Popis: | International audience; This article investigates the emptying process of a continuous powder mixer, from both experimental and modelling points of view. The apparatus used in this work is a pilot scale commercial mixer Gericke GCM500, for which a specific experimental protocol has been developed to determine the hold up in the mixer and the real outflow. We demonstrate that the dynamics of the process is governed by the rotational speed of the stirrer, as it fixes characteristic values of the hold-up weight, such as a threshold hold-up weight. This is integrated into a Markov chain matrix representation that can predict the evolution of the hold-up weight, as well as that of the outflow rate during emptying the mixer. Depending on the advancement of the process, the Markov chain must be considered as non-homogeneous. The comparison of model results with experimental data not used in the estimation procedure of the parameters contributes to validating the viability of this model. In particular, we report results obtained when emptying the mixer at variable rotational speed, through step changes. |
| Databáze: | OpenAIRE |
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