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Open AccessArticle

Biphasic Computational Fluid Dynamics Modelling of the Mixture in an Agricultural Sprayer Tank

1
Escuela Politécnica Superior, University of Zaragoza, 22071 Huesca, Spain
2
Department of Agri-Food Engineering and Biotechnology, Universitat Politécnica de Catalunya, Castelldefels, 08860 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Mohammad Yaghoub Abdollahzadeh Jamalabadi
Molecules 2020, 25(8), 1870; https://doi.org/10.3390/molecules25081870
Received: 24 March 2020 / Revised: 13 April 2020 / Accepted: 15 April 2020 / Published: 18 April 2020
(This article belongs to the Special Issue Applications of Computational Fluid Dynamics)
Agitation inside agricultural sprayer tanks can be studied while using an international standard procedure, based on obtaining internal samples of liquid. However, in practice, this test is not easy to perform. Herein, we propose the explicit study of the mixing procedure with biphasic computer simulations using Computational Fluid Dynamics (CFD). An experimental test was performed on a 3000 L tank of a commercial air-assisted sprayer, with two different agitation system configurations, in order to compare the results of several theoretical physical models of biphasic flows for CFD, both Eulerian and Lagrangian. From the analysis of these theoretical models, we conclude that the Volume of Fluid model is not viable and the Discrete Phase Model produces erroneous results, while the Eulerian and Mixture models can both be useful. However, the results obtained suggest that complex streams generated by real-world agitation systems produce more errors in calculations. Both models can be conducted in the design phase, prior to the implementation of the machine. In addition, the computer simulations allow for researchers to analyse the mixing process in detail, making it possible to evaluate the efficiency of an agitation system according to the time that is required to reach mixture homogeneity. View Full-Text
Keywords: spray tank; agitation system; product concentration; Euler-Euler models; plant protection products spray tank; agitation system; product concentration; Euler-Euler models; plant protection products
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MDPI and ACS Style

Badules, J.; Vidal, M.; Boné, A.; Gil, E.; García-Ramos, F.J. Biphasic Computational Fluid Dynamics Modelling of the Mixture in an Agricultural Sprayer Tank. Molecules 2020, 25, 1870.

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