En cliquant sur le bouton ci-dessous, vous pouvez consulter la liste des dernières publications scientifiques du laboratoire dans la "Collection HAL du M2P2" qui permet de faire des recherches par année, auteur, type de document (article scientifique, ouvrage, chapitre d'ouvrage, actes de conférence...), etc.
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Clémence Cordier, Christophe Stavrakakis, Benjamin Morga, Lionel Degremont, Alexandra Voulgaris, et al.. Removal of pathogens by ultrafiltration from sea water. Environment International, Elsevier, 2020, 142, pp.105809. ⟨10.1016/j.envint.2020.105809⟩. ⟨hal-02891935⟩ Plus de détails...
Among water treatment processes, ultrafiltration is known to be efficient for the elimination of micro-organisms (bacteria and viruses). In this study, two pathogens were targeted, a bacterium, Vibrio aestuarianus and a virus, OsHV-1, with the objective to produce high quality water from seawater, in the case of shellfish productions. The retention of those microorganisms by ultrafiltration was evaluated at labscale. In the case of OsHV-1, the protection of oysters was validated by in vivo experiments using oysters spat and larvae, both stages being highly susceptible to the virus. The oysters raised using contaminated seawater which was then subsequently treated by ultrafiltration, had similar mortality to the negative controls. In the case of V. aestuarianus, ultrafiltration allowed a high retention of the bacteria in seawater with concentrations below the detection limits of the 3 analytical methods (flow cytometry, direct seeding and seeding after filtration to 0.22 µm). Thus, the quantity of V. aestuarianus was at least, 400 times inferior to the threshold known to induce mortalities in oysters. Industrial scale experiment on a several months period confirmed the conclusion obtained at lab scale on the Vibrio bacteria retention. Indeed, no bacteria from this genus, potentially harmful for oysters, was detected in permeate and this, whatever the quality of the seawater treated and the bacteria concentration upstream of the membrane. Moreover, the resistance of the process was confirmed with a stability of hydraulic performances over time for two water qualities and even facing an algal bloom. In terms of retention and resistance, ultrafiltration process was validated for the treatment of seawater towards the targeted pathogenic microorganisms, with the aim of biosecuring shellfish productions.
Clémence Cordier, Christophe Stavrakakis, Benjamin Morga, Lionel Degremont, Alexandra Voulgaris, et al.. Removal of pathogens by ultrafiltration from sea water. Environment International, Elsevier, 2020, 142, pp.105809. ⟨10.1016/j.envint.2020.105809⟩. ⟨hal-02891935⟩
M. Meldi, A. Mariotti, M. Salvetti, P. Sagaut. Numerical investigation of skewed spatially evolving mixing layers. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2020, 897, pp.A35. ⟨10.1017/jfm.2020.407⟩. ⟨hal-02892248⟩ Plus de détails...
The sensitivity of turbulent dynamics in spatially evolving mixing layers to small skew angles is investigated via direct numerical simulation. Angle is a measure of the lack of parallelism between the two asymptotic flows, whose interaction creates the turbulent mixing region. The analysis is performed considering a large range of values of the shear intensity parameter . This two-dimensional parameter space is explored using the results of a database of 18 direct numerical simulations. Instantaneous fields as well as time-averaged quantities are investigated, highlighting important mechanisms in the emergence of turbulence and its characteristics for this class of flows. In addition, a stochastic approach is used in which and are considered as random variables with a given probability distribution. The response surfaces of flow statistics in the parameter space are built through non-intrusive generalized polynomial chaos. It is found that variations of the parameter have a primary effect on the growth of the mixing region. A secondary effect associated with is observed as well. Higher values for the skew angle are responsible for a rapid increase in growth of the inlet structures, enhancing the development of the mixing region. The impact on the turbulence features and, in particular, on the Reynolds stress tensor is also significant. A modification of the normalized diagonal components of the Reynolds stress tensor due to is observed. In addition, the interaction between the parameters and is here the governing element.
M. Meldi, A. Mariotti, M. Salvetti, P. Sagaut. Numerical investigation of skewed spatially evolving mixing layers. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2020, 897, pp.A35. ⟨10.1017/jfm.2020.407⟩. ⟨hal-02892248⟩
Etienne Loiseau, Simon Gsell, Aude Nommick, Charline Jomard, Delphine Gras, et al.. Active mucus–cilia hydrodynamic coupling drives self-organization of human bronchial epithelium. Nature Physics, Nature Publishing Group, 2020, ⟨10.1038/s41567-020-0980-z⟩. ⟨hal-02914172⟩ Plus de détails...
The respiratory tract is protected by mucus, a complex fluid transported along the epithelial surface by the coordinated beating of millions of microscopic cilia, hence the name of mucociliary clearance. Its impairment is associated with all severe chronic respiratory diseases. Yet, the relationship between ciliary density and the spatial scale of mucus transport, as well as the mechanisms that drive ciliary-beat orientations are much debated. Here, we show on polarized human bronchial epithelia that mucus swirls and circular orientational order of the underlying ciliary beats emerge and grow during ciliogenesis, until a macroscopic mucus transport is achieved for physiological ciliary densities. By establishing that the macroscopic ciliary-beat order is lost and recovered by removing and adding mucus, respectively, we demonstrate that cilia–mucus hydrodynamic interactions govern the collective dynamics of ciliary-beat directions. We propose a two-dimensional model that predicts a phase diagram of mucus transport in accordance with the experiments. This paves the way to a predictive in silico modelling of bronchial mucus transport in health and disease.
Etienne Loiseau, Simon Gsell, Aude Nommick, Charline Jomard, Delphine Gras, et al.. Active mucus–cilia hydrodynamic coupling drives self-organization of human bronchial epithelium. Nature Physics, Nature Publishing Group, 2020, ⟨10.1038/s41567-020-0980-z⟩. ⟨hal-02914172⟩
Jérémie Labasse, Uwe Ehrenstein, Philippe Meliga. Numerical exploration of the pitching plate parameter space with application to thrust scaling. Applied Ocean Research, Elsevier, 2020, 101, pp.102278. ⟨10.1016/j.apor.2020.102278⟩. ⟨hal-02903603⟩ Plus de détails...
Jérémie Labasse, Uwe Ehrenstein, Philippe Meliga. Numerical exploration of the pitching plate parameter space with application to thrust scaling. Applied Ocean Research, Elsevier, 2020, 101, pp.102278. ⟨10.1016/j.apor.2020.102278⟩. ⟨hal-02903603⟩
Cláudio Fonte, David Fletcher, Pierrette Guichardon, Joelle Aubin. Simulation of micromixing in a T-mixer under laminar flow conditions. Chemical Engineering Science, Elsevier, 2020, 222, pp.115706. ⟨10.1016/j.ces.2020.115706⟩. ⟨hal-02892241⟩ Plus de détails...
The CFD simulation of fast reactions in laminar flows can be computationally challenging due to the lack of appropriate sub-grid micromixing models in this flow regime. In this work, simulations of micromixing via the implementation of the competitive-parallel Villermaux/Dushman reactions in a T-micromixer with square bends for Reynolds numbers in the range 60–300 are performed using both a conventional CFD approach and a novel lamellae-based model. In the first, both the hydrodynamics and the concentration fields of the reaction species are determined directly using a finite volume approach. In the second, the hydrodynamic field from the CFD calculations is coupled with a Lagrangian model that is used to perform the chemical reactions indirectly. Both sets of results are compared with previously published experimental data and show very good agreement. The lamellar model has the advantage of being much less computationally intensive than the conventional CFD approach, which requires extremely fine computational grids to resolve sharp concentration gradients. It is a promising solution to model fast chemical reactions in reactors with complex geometries in the laminar regime and for industrial applications.
Cláudio Fonte, David Fletcher, Pierrette Guichardon, Joelle Aubin. Simulation of micromixing in a T-mixer under laminar flow conditions. Chemical Engineering Science, Elsevier, 2020, 222, pp.115706. ⟨10.1016/j.ces.2020.115706⟩. ⟨hal-02892241⟩
Margot Bador, Julien Boe, Laurent Terray, Lisa V. Alexander, Alexander Baker, et al.. Impact of Higher Spatial Atmospheric Resolution on Precipitation Extremes Over Land in Global Climate Models. Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2020, 125 (13), ⟨10.1029/2019JD032184⟩. ⟨hal-02908744⟩ Plus de détails...
Margot Bador, Julien Boe, Laurent Terray, Lisa V. Alexander, Alexander Baker, et al.. Impact of Higher Spatial Atmospheric Resolution on Precipitation Extremes Over Land in Global Climate Models. Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2020, 125 (13), ⟨10.1029/2019JD032184⟩. ⟨hal-02908744⟩
Journal: Journal of Geophysical Research: Atmospheres
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Generation of an O/W emulsion in a flow-focusing microchip: importance of wetting conditions and of dynamic interfacial tension. Chemical Engineering Research and Design, Elsevier, 2020, ⟨10.1016/j.cherd.2020.04.012⟩. ⟨hal-02799613⟩ Plus de détails...
To date, there is no information on the microfluidic emulsification of dibutyl adipate and n-butyl acetate in water. Since these solvents are very suitable for microencapsulation by interfacial polymerization, it is highly necessary to study the emulsification behavior of these solvents in microchannels. This work shows that the microfluidic emulsification of these solvents in water may fail to obtain stabilised flow regimes. This is due to droplet coalescence and wall wetting, even if a hydrophilic microchip is used. Hydrodynamic results show that squeezing and dripping regimes are especially affected because of the wall wetting by the dispersed phase. This difficulty can be circumvented by adding a surfactant (here Tween 80) into the aqueous phase. However, high surfactant concentrations (ten times the critical micelle concentration) should be used for the water-dibutyl adipate system. Indeed, comparison of flow maps for several surfactant concentrations seems to indicate that the dynamic interfacial tension is higher than the one expected (equilibrium), for surfactant concentrations lower than one hundred times the critical micelle concentration. The estimated diffusion time of Tween 80 is compared to the droplet formation time at different conditions. The choice of more appropriate dimensionless numbers to represent flow maps is also discussed.
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Generation of an O/W emulsion in a flow-focusing microchip: importance of wetting conditions and of dynamic interfacial tension. Chemical Engineering Research and Design, Elsevier, 2020, ⟨10.1016/j.cherd.2020.04.012⟩. ⟨hal-02799613⟩
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Generation of an O/W emulsion in a flow-focusing microchip: importance of wetting conditions and of dynamic interfacial tension. Chemical Engineering Research and Design, Elsevier, 2020, ⟨10.1016/j.cherd.2020.04.012⟩. ⟨hal-02799613⟩ Plus de détails...
6 To date, there is no information on the microfluidic emulsification of dibutyl adipate and 7 n-butyl acetate in water. Since these solvents are very suitable for microencapsulation by 8 interfacial polymerization, it is highly necessary to study the emulsification behavior of these 9 solvents in microchannel. This work shows that the microfluidic emulsification of these sol-10 vents in water may fail to obtain stabilized flow regimes. This is due to droplet coalescence 11 and wall wetting, even if a hydrophilic microchip is used. Hydrodynamic results show that 12 squeezing and dripping regimes are especially affected because of the wall wetting by the 13 dispersed phase. This difficulty can be circumvented by adding a surfactant (here Tween 14 80) into the aqueous phase. However, high surfactant concentrations (ten times the crit-15 ical micelle concentration) should be used for the water-dibutyl adipate system. Indeed, 16 comparison of flow maps for several surfactant concentrations seems to indicate that the 17 dynamic interfacial tension is higher than the one expected (equilibrium), for surfactant 18 concentrations lower than one hundred times the critical micelle concentration. The esti-19 mated diffusion time of Tween 80 is compared to the droplet formation time at different 20 conditions. The choice of more appropriate dimensionless numbers to represent flow maps 21 is also discussed. 22
Jiupeng Du, Nelson Ibaseta, Pierrette Guichardon. Generation of an O/W emulsion in a flow-focusing microchip: importance of wetting conditions and of dynamic interfacial tension. Chemical Engineering Research and Design, Elsevier, 2020, ⟨10.1016/j.cherd.2020.04.012⟩. ⟨hal-02799613⟩
Mathias Monnot, S. Laborie, G. Hébrard, N. Dietrich. New approaches to adapt escape game activities to large audience in chemical engineering: Numeric supports and students’ participation. Education for Chemical Engineers, Elsevier, 2020, 32 (6), pp.50-58. ⟨10.1016/j.ece.2020.05.007⟩. ⟨hal-02902064⟩ Plus de détails...
Mathias Monnot, S. Laborie, G. Hébrard, N. Dietrich. New approaches to adapt escape game activities to large audience in chemical engineering: Numeric supports and students’ participation. Education for Chemical Engineers, Elsevier, 2020, 32 (6), pp.50-58. ⟨10.1016/j.ece.2020.05.007⟩. ⟨hal-02902064⟩
Charles-Hugo Marquette, Jacques Boutros, Jonathan Benzaquen, Marion Ferreira, Jean Pastre, et al.. Circulating tumour cells as a potential biomarker for lung cancer screening: a prospective cohort study. The Lancet Respiratory Medicine, Elsevier, 2020, 8 (7), pp.709-716. ⟨10.1016/S2213-2600(20)30081-3⟩. ⟨hal-02897076⟩ Plus de détails...
Charles-Hugo Marquette, Jacques Boutros, Jonathan Benzaquen, Marion Ferreira, Jean Pastre, et al.. Circulating tumour cells as a potential biomarker for lung cancer screening: a prospective cohort study. The Lancet Respiratory Medicine, Elsevier, 2020, 8 (7), pp.709-716. ⟨10.1016/S2213-2600(20)30081-3⟩. ⟨hal-02897076⟩
