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Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation

In this study, the convective heating/cooling process assisted by US irradiation is analyzed with the aims of developing a new convective heat transfer correlation. Heat transfer experiments were conducted with different copper machined geometries (cube, sphere and cylinder), fluid velocities (0.93–...

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Autores principales: Martínez-Ramos, T., Corona-Jiménez, E., Ruiz-López, I.I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8113778/
https://www.ncbi.nlm.nih.gov/pubmed/33957370
http://dx.doi.org/10.1016/j.ultsonch.2021.105575
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author Martínez-Ramos, T.
Corona-Jiménez, E.
Ruiz-López, I.I.
author_facet Martínez-Ramos, T.
Corona-Jiménez, E.
Ruiz-López, I.I.
author_sort Martínez-Ramos, T.
collection PubMed
description In this study, the convective heating/cooling process assisted by US irradiation is analyzed with the aims of developing a new convective heat transfer correlation. Heat transfer experiments were conducted with different copper machined geometries (cube, sphere and cylinder), fluid velocities (0.93–5.00 × 10(−3) m/s), temperatures (5–60 °C), and US intensities (0–6913 W/m(2)) using water as heat transfer fluid. The Nusselt (Nu) equation was obtained by assuming an apparent Nu number in the US-assisted process, expressed as the sum of contributions of the forced convection and cavitation-acoustic streaming effects. The Nu equation was validated with two sets of experiments conducted with a mixture of ethylene glycol and water (1:1 V/V) or a CaCl(2) aqueous solution (30 g/L) as immersion media, achieving a satisfactory reproduction of experimental data, with mean relative deviations of 17.6 and 17.8%, respectively. In addition, a conduction model with source term and the proposed correlation were applied to the analysis of US-accelerated heating kinetics of dry-cured ham reported in literature. Results demonstrated that US improves heating of ham slices because of the increased heat transfer coefficients and the direct absorption of US power by the foodstuff.
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spelling pubmed-81137782021-05-18 Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation Martínez-Ramos, T. Corona-Jiménez, E. Ruiz-López, I.I. Ultrason Sonochem Sonochem/processing inNA In this study, the convective heating/cooling process assisted by US irradiation is analyzed with the aims of developing a new convective heat transfer correlation. Heat transfer experiments were conducted with different copper machined geometries (cube, sphere and cylinder), fluid velocities (0.93–5.00 × 10(−3) m/s), temperatures (5–60 °C), and US intensities (0–6913 W/m(2)) using water as heat transfer fluid. The Nusselt (Nu) equation was obtained by assuming an apparent Nu number in the US-assisted process, expressed as the sum of contributions of the forced convection and cavitation-acoustic streaming effects. The Nu equation was validated with two sets of experiments conducted with a mixture of ethylene glycol and water (1:1 V/V) or a CaCl(2) aqueous solution (30 g/L) as immersion media, achieving a satisfactory reproduction of experimental data, with mean relative deviations of 17.6 and 17.8%, respectively. In addition, a conduction model with source term and the proposed correlation were applied to the analysis of US-accelerated heating kinetics of dry-cured ham reported in literature. Results demonstrated that US improves heating of ham slices because of the increased heat transfer coefficients and the direct absorption of US power by the foodstuff. Elsevier 2021-04-25 /pmc/articles/PMC8113778/ /pubmed/33957370 http://dx.doi.org/10.1016/j.ultsonch.2021.105575 Text en © 2021 The Authors. Published by Elsevier B.V. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Sonochem/processing inNA
Martínez-Ramos, T.
Corona-Jiménez, E.
Ruiz-López, I.I.
Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation
title Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation
title_full Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation
title_fullStr Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation
title_full_unstemmed Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation
title_short Analysis of ultrasound-assisted convective heating/cooling process: Development and application of a Nusselt equation
title_sort analysis of ultrasound-assisted convective heating/cooling process: development and application of a nusselt equation
topic Sonochem/processing inNA
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8113778/
https://www.ncbi.nlm.nih.gov/pubmed/33957370
http://dx.doi.org/10.1016/j.ultsonch.2021.105575
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