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Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension

In winemaking, clarification and stabilization are the processes by which insoluble matter suspended in the wine (called lees) is removed before bottling. The light lees represent 2–4% of the total wine volume. Under certain circumstances, resuspension of lees may occur. The resuspension of lees has...

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Autores principales: Bogard, Fabien, Beaumont, Fabien, Vasserot, Yann, Simescu-Lazar, Florica, Nsom, Blaise, Liger-Belair, Gérard, Polidori, Guillaume
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7404562/
https://www.ncbi.nlm.nih.gov/pubmed/32630621
http://dx.doi.org/10.3390/foods9070865
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author Bogard, Fabien
Beaumont, Fabien
Vasserot, Yann
Simescu-Lazar, Florica
Nsom, Blaise
Liger-Belair, Gérard
Polidori, Guillaume
author_facet Bogard, Fabien
Beaumont, Fabien
Vasserot, Yann
Simescu-Lazar, Florica
Nsom, Blaise
Liger-Belair, Gérard
Polidori, Guillaume
author_sort Bogard, Fabien
collection PubMed
description In winemaking, clarification and stabilization are the processes by which insoluble matter suspended in the wine (called lees) is removed before bottling. The light lees represent 2–4% of the total wine volume. Under certain circumstances, resuspension of lees may occur. The resuspension of lees has been attributed to temperature variations between the wine stored in tanks and the environment of the cellar. From in situ, laboratory-scale studies involving laser tomography techniques, it was shown that low (positive or negative) thermal gradients between a wine tank containing light lees and its external environment induce mass transfer by natural convection. To extrapolate these findings to full-scale tanks, an Eulerian-Eulerian multiphase CFD model was applied to simulate the two-phase flow behavior as a function of temperature variations on a 24–h cycle. Numerical temperature and time-dependent flow patterns of both wine and lees confirm that low thermal gradients induce sufficient fluid energy to resuspend the lees, thus showing that the laboratory results can be extrapolated to full-scale tanks.
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spelling pubmed-74045622020-08-11 Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension Bogard, Fabien Beaumont, Fabien Vasserot, Yann Simescu-Lazar, Florica Nsom, Blaise Liger-Belair, Gérard Polidori, Guillaume Foods Article In winemaking, clarification and stabilization are the processes by which insoluble matter suspended in the wine (called lees) is removed before bottling. The light lees represent 2–4% of the total wine volume. Under certain circumstances, resuspension of lees may occur. The resuspension of lees has been attributed to temperature variations between the wine stored in tanks and the environment of the cellar. From in situ, laboratory-scale studies involving laser tomography techniques, it was shown that low (positive or negative) thermal gradients between a wine tank containing light lees and its external environment induce mass transfer by natural convection. To extrapolate these findings to full-scale tanks, an Eulerian-Eulerian multiphase CFD model was applied to simulate the two-phase flow behavior as a function of temperature variations on a 24–h cycle. Numerical temperature and time-dependent flow patterns of both wine and lees confirm that low thermal gradients induce sufficient fluid energy to resuspend the lees, thus showing that the laboratory results can be extrapolated to full-scale tanks. MDPI 2020-07-02 /pmc/articles/PMC7404562/ /pubmed/32630621 http://dx.doi.org/10.3390/foods9070865 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bogard, Fabien
Beaumont, Fabien
Vasserot, Yann
Simescu-Lazar, Florica
Nsom, Blaise
Liger-Belair, Gérard
Polidori, Guillaume
Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension
title Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension
title_full Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension
title_fullStr Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension
title_full_unstemmed Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension
title_short Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension
title_sort combined experimental and cfd approach of two-phase flow driven by low thermal gradients in wine tanks: application to light lees resuspension
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7404562/
https://www.ncbi.nlm.nih.gov/pubmed/32630621
http://dx.doi.org/10.3390/foods9070865
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