Procédés et mécanique aux petites échelles PROMETHEE

Deformable micro-objects under hydrodynamic forcing

Microfluidics and Processes

Flow organization at small scales

Membrane separations

suite...

Processes and Small Scales Mechanics Team
Présentation

The PROMETHEE team develops marked competences in the field of continuum mechanics and process engineering, while combining experimental approaches with the development of theories and models. The originality of the studies carried out is declined according to several specificities:

  • Micro-nano scale of observation and analysis that evacuates the problems related to turbulence (Stokes regime) but requires to consider aspects at the boundaries of the discipline;
  • Predominant role of interfaces: interactions with solid walls at the nano scale (nano-tubes), fluid-structure interaction with fluid or polymerized membranes at the meso scale;
  • Connection with complex fluids, soft matter and biological systems.

On the theme of micro- and nano-fluidics, the objects of study, physico-chemical (drops, capsules,...) and biological (vesicles, red blood cells,...), also include the intensified processes of encapsulation and vectorization by microreactor, themes in full expansion. The team is also developing tools for characterizing the organization at small scales such as the development of numerical simulations to account for the segregation obtained within granular media and the development of chemical methods to characterize the effects of micromixing (mixing at the molecular scale). In addition to this, we are involved in the characterization and thermodynamic modeling of complex media.

The numerical tools developed and implemented are varied: boundary integral, finite elements, immersed boundary method, Lattice Boltzman method... 

Responsable

x >

Annuaire personnel permanent

x >

Doctorants, Post-Doctorants et CDD

  • Doctorant
    équipe Procédés et mécanique aux petites échelles
  • Doctorant
    équipe Procédés et mécanique aux petites échelles
  • équipe Procédés et mécanique aux petites échelles
  • Doctorant
    équipe Procédés et mécanique aux petites échelles
  • Doctorant
    équipe Procédés et mécanique aux petites échelles
x >

Publications de l'équipe

  • Pierrette Guichardon, Carlos Baqueiro, Nelson Ibaseta. Villermaux–Dushman Test of Micromixing Characterization Revisited: Kinetic Effects of Acid Choice and Ionic Strength. Industrial and engineering chemistry research, American Chemical Society, 2021, 60 (50), pp.18268-18282. ⟨10.1021/acs.iecr.1c03208⟩. ⟨hal-03597451⟩ Plus de détails...
  • Pierrette Guichardon, Carlos Baqueiro, Nelson Ibaseta. Villermaux–Dushman Test of Micromixing Characterization Revisited: Kinetic Effects of Acid Choice and Ionic Strength. Industrial and engineering chemistry research, American Chemical Society, 2021, 60 (50), pp.18268-18282. ⟨10.1021/acs.iecr.1c03208⟩. ⟨hal-03514628⟩ Plus de détails...
  • Oleksandr Dimitrov, Pierrette Guichardon, Isabelle Raspo, Evelyne Neau. Vapor–Liquid Equilibria of the Aqueous and Organic Mixtures Composed of Dipropylene Glycol Methyl Ether, Dipropylene Glycol n -Butyl Ether, and Propylene Glycol n -Butyl Ether. Part II: Modeling Based on the NRTL-PR Model. Industrial and engineering chemistry research, American Chemical Society, 2021, 60 (30), pp.11513-11524. ⟨10.1021/acs.iecr.1c01545⟩. ⟨hal-03379757⟩ Plus de détails...
  • Sudip Das, Marc Jaeger, Marc Leonetti, Rochish M. Thaokar, Paul G. Chen. Effect of pulse width on the dynamics of a deflated vesicle in unipolar and bipolar pulsed electric fields. Physics of Fluids, American Institute of Physics, 2021, 33 (8), pp.081905. ⟨10.1063/5.0057168⟩. ⟨hal-03317441⟩ Plus de détails...
  • Hadrien Jaubert, Philippe Borel, Pierrette Guichardon, Jean-François Portha, Jean-Noël Jaubert, et al.. Assessment of organic Rankine cycle configurations for solar polygeneration orientated to electricity production and desalination. Applied Thermal Engineering, Elsevier, 2021, 195, pp.116983. ⟨10.1016/j.applthermaleng.2021.116983⟩. ⟨hal-03597561⟩ Plus de détails...
x >

Dernières rencontres scientifiques

Soutenances de thèses et HDR

Mercredi 16 juin 2021 - De la vague déferlante au globule rouge / Soutenance HDR Paul Gang CHEN
Dr. Paul Gang CHEN

Date de soutenance : le mercredi 16 juin à 15h00 (visio - Zoom)

Résumé : au cours de cette soutenance, je présenterai mes différents travaux sur la modélisation et la simulation numérique d’écoulements interfaciaux : de la vague déferlante au globule rouge.

Jury :
M. Daniel Henry, LMFA, École Centrale de Lyon, Rapporteur
M. Grétar Tryggvason, Johns Hopkins University, Rapporteur
M. Stéphane Zaleski, d’Alembert, Sorbonne Université, Rapporteur
M. Richard Saurel, LMA, Aix-Marseille Université
M. Marc Jaeger, M2P2, École Centrale de Marseille, Tuteur
M. Marc Leonetti, LRP, Grenoble, Invité

Mardi 16 Mars - Preparation of polyurea microcapsules calibrated in size and shell thickness by a microfluidic process for the absorption of ultraviolet / Soutenance de thèse Jiupeng DU
Doctorant : Jiupeng DU

Date de soutenance :  le mardi 16 mars à 14h00 en VISIO

Abstract : This thesis aims to exploit the advantages of microfluidics for the production of polyurea microcapsules. Because of its ability to produce drops with a very narrow size distribution, microfluidic emulsification shows great interest as the first step for rapid interfacial polymerisation. Although the literature on the production of drops in microchannels is abundant, commonly used organic solvents are limited to certain toxic hydrocarbon oils or ketones, as these solvents are very hydrophobic and therefore easy to emulsify in water.

The first part of the work concentrates on the feasibility of emulsifying two less hydrophobic green solvents (dibutyl adipate and n-butyl acetate) in water and study the different flow regimes within a hydrophilic flow-focusing microchannel of glass. The results show that the wetting of the walls by dibutyl adipate can be modified by adding a surfactant (Tween 80). However, the formation of the drops being much faster than the transfer of the surfactant to the interface of the drop being formed, concentrations much higher than the critical micellar concentration are necessary to avoid wetting of the walls by the dispersed phase and thus the appearance of disordered flow regimes. The behavior of the n-butyl acetate/water system is similar, but the comparison of the flow maps for the two systems raises the question of the choice of dimensional numbers for representing the transition between the dripping and jetting regimes.

In the second part, the addition of an interfacial polymerization within the emulsion formed by microfluidics is studied in detail. We aim to fabricate polyurea microcapsules calibrated in size and shell thickness containing octyl salicylate (OS). These microcapsules are used to study, for the first time, the influence of the shell thickness of microcapsules on their absorption efficiency against ultraviolet (UV) light. The results show that an increase of the concentration of isocyanate (HDB-LV or hexamethylene diisocyanate biuret) in the organic phase increases the shell thickness of the microcapsules, their encapsulation efficiency and very moderately their average absorbance. The average absorbance of the microcapsules is inversely proportional to the size of the microcapsules (for the same mass of OS). A theoretical model is proposed to estimate the average absorbance as a function of the mass fraction of HDB-LV in the organic phase and of the size of microcapsules. Finally, the concentration of amine (ethylenediamine) has been optimized to ensure the spherical shape of the microcapsules.

Jury:

Marc LEONETTI (CNRS, LRP), Rapporteur
Nathalie LE SAUZE (Univ Toulouse III), Rapportrice             
Christophe Alexandre SERRA (Univ Strasbourg), Examinateur
Stéphane VEESLER (CNRS, CINAM), Examinateur
Pierrette GUICHARDON (ECM, M2P2), Directrice      
Nelson IBASETA (ECM, M2P2), Codirecteur
Jean-Claude HUBAUD (Helioscience), invité
Bruno MONTAGNIER (Capsudev), invité