Among the many unknowns in the study of atomizing sprays, defining an unambiguous way to analyze turbulence is, perhaps, one of the most limiting ones. The lack of proper tools for the analysis of the turbulence field (e.g. specific one/two-point statistics, spectrum, structure functions) limits the understanding of the overall phenomenon occurring, impeding the correct estimation of motion scales (from the Kolmogorov one to the integral one). The present work proposes a methodology to analyze the turbulence in atomizing jets using a pseudo-fluid method. The many challenges presented in these types of flows (such as temporal fluid properties uncertainties, strong anisotropy and lack of a priori chance of determining the motion scales) can be simplified by such a method, as it will be clearly shown by the smooth results obtained. Finally, the method is tested against the one-phase flows turbulent data available in the literature for the Kolmogorov scaling of the one-dimension energy spectra, showing how a pseudo-fluid method could provide a reliable tool to analyze multiphase turbulence, especially in spray's primary atomization. (C) 2020 Elsevier Ltd. All rights reserved.

Study of turbulence in atomizing liquid jets / Torregrosa, Antonio J.; Raúl, Payri; Javier Salvador, F.; CRIALESI ESPOSITO, Marco. - In: INTERNATIONAL JOURNAL OF MULTIPHASE FLOW. - ISSN 0301-9322. - 129:(2020), pp. 103328-103328. [10.1016/j.ijmultiphaseflow.2020.103328]

Study of turbulence in atomizing liquid jets

Marco Crialesi-Esposito
2020

Abstract

Among the many unknowns in the study of atomizing sprays, defining an unambiguous way to analyze turbulence is, perhaps, one of the most limiting ones. The lack of proper tools for the analysis of the turbulence field (e.g. specific one/two-point statistics, spectrum, structure functions) limits the understanding of the overall phenomenon occurring, impeding the correct estimation of motion scales (from the Kolmogorov one to the integral one). The present work proposes a methodology to analyze the turbulence in atomizing jets using a pseudo-fluid method. The many challenges presented in these types of flows (such as temporal fluid properties uncertainties, strong anisotropy and lack of a priori chance of determining the motion scales) can be simplified by such a method, as it will be clearly shown by the smooth results obtained. Finally, the method is tested against the one-phase flows turbulent data available in the literature for the Kolmogorov scaling of the one-dimension energy spectra, showing how a pseudo-fluid method could provide a reliable tool to analyze multiphase turbulence, especially in spray's primary atomization. (C) 2020 Elsevier Ltd. All rights reserved.
2020
129
103328
103328
Study of turbulence in atomizing liquid jets / Torregrosa, Antonio J.; Raúl, Payri; Javier Salvador, F.; CRIALESI ESPOSITO, Marco. - In: INTERNATIONAL JOURNAL OF MULTIPHASE FLOW. - ISSN 0301-9322. - 129:(2020), pp. 103328-103328. [10.1016/j.ijmultiphaseflow.2020.103328]
Torregrosa, Antonio J.; Raúl, Payri; Javier Salvador, F.; CRIALESI ESPOSITO, Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1301457
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