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Post-doctoral position

Applications Post-doctoral position

The Labex provides post-doctoral grants on subjects pointed out by participant teams according to their needs.

Gross salary are set by the IDEX A*MIDEX­:

Up to 3 years of professional experience after the PhD­:

  • Gross salary 2423 € / month
  • Net salary 1960€ / month (medical and social covers included)

Beyond 3 years of professional experience after the PhD­:

  • Gross salary 2843 € / month
  • Net salary 2300€ / month (medical and social covers included)

OFFERS

Title: Flows of gas mixtures in micro-nano porous media

Duration: 1 year    Period: 01.05.2018 - 30.04.2019

Location: Marseille, France Gross salary: from 2423 € to 2843 €/month, depending on qualification and experience

Research project and job description

Title: Flows of gas mixtures in micro-nano porous media

Summary:

The objective of this post doctorate is to broaden the research theme recently started. This topic concerns the experimental study of the flow of gaseous mixtures in micro-nano porous systems. First step is the development of an experimental methodology for characterizing the flow of gas mixtures through such a system and then the experimental study of these flows on a large variability of operating parameters. In a second step, is the development of the mathematical models for the simulations of the gas mixtures flows at micro scales. These models will be based on the real geometry resulting from tomography of micro and nanoporous media.

Job description:

Candidates must have a Ph.D. preferably in Fluid Mechanics, Process Engineering, Physics or Analytical Chemistry, and must also have a record of publications relevant to their research experience.
Previous experience with gaseous mass spectrometer analyzes, including experience with experimental methods in vacuum technology, would be an asset. Prior experience in microfluidics, especially in flow dynamics, could be a plus for the project.
Candidates should be able to write scientific activities and reports in both French and English.

Essential skills:

Mastery of Labview, Matlab, Mass Spectrometry, Vacuum Technique

Desired skills:

Flow experience in porous media. Experience in a diluted medium

Labex team

Axis, action, part : Fluide complexe, Procédés membranaires et nanofluides, «Comportement des fluides dans les micro-systèmes»


Contact: Name, surname: Graur Martin Irina
Mail: irina.martin@univ-amu.fr Phone: +33(0)6 33 23 69 00

How to apply

Send an application including:

  • A detailed CV with a list of publications
  • A cover letter
  • A list of scientific personalities able to comment on the application

to both these addresses:

Relevant group leader (irina.martin@univ-amu.fr)

Labex management (LabexConseilCoordination@irphe.univ-mrs.fr)

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Title: Consideration of sub-mesoscale structural dynamics in the modeling of continuous media of biomimetic micro-objects in flow

Duration: 1 year    Period: From March 1st, 2019

Location: Marseille, France Gross salary: from 2423 € to 2843 €/month, depending on qualification and experience

Research project and job description

Summary:

Our current research focuses on the study of dynamics of soft (deformable) particles under microfluidic flows, i.e. micro-bags filled with a more or less viscous liquid and whose behavior is driven by the richness of its membrane mechanics. It is a very active field of research because of its potential for technological valorization in agri-food, cosmetics (encapsulation of active ingredients) and pharmaceutical (vectorization of drugs). On the fundamental theoretical research aspect (mathematical and numerical modeling), capsule and vesicle embody the basic biomimetic micro-objects for the study of even more complex objects such as biological cells. The models that we develop, based on a description of continuum mechanics and on the boundary integral method (BIM) for the fluid-structure interaction problem, allow us today to explore a wide spectrum of deformable objects and that in a unique formalism: a vesicle (incompressible fluid interface and bending force), a polymersome (vesicle + surface viscosities), a capsule (any constitutive law with or without resistance to bending, with or without surface viscosities) and of course a drop (with or without surface viscosities). Recently, we are also able to study these deformable objects in a more realistic or biological configuration, for example, vesicles in a confined Poiseuille flow. In addition, we have recently developed a new modeling approach for the red blood cell membrane by combining an existing continuum vesicle model with a coarse-grained model for the cytoskeleton consisting of a spring network. The question that can be asked then is to know if a model of capsule would not be more legitimate and effective, insofar as it allows to find the homogeneity and the isotropy of a tablecloth formed of a big number of randomly oriented filaments. Combining our vesicle model with our capsule model as a replacement for the spring network is an idea we have not explored yet (Objective 1). The consideration of thermal fluctuations in the spirit of what has been done in the paper of Turlier et al. (Nature Physics 12, 513-520, 2016), is also a path to explore (Objective 2). The goal at first will be to achieve a method of implementation of random forces at the interface. Fortunately, the results of statistical physics (fluctuation-dissipation theorem) should validate our approach.

Job description:

We are seeking a highly motivated candidate who should have a PhD in fluid mechanics, applied physics or applied mathematics, preferably with experience in numerical simulation of fluid flow or scientific computing. The candidate will work with a team and collaborate also with researchers from other laboratories, and have access to the Computing Facility (including GPU-accelerated high-performance computing) of Aix-Marseille University.

Essential skills:

Analytical and computational fluid dynamics; Low Reynolds number hydrodynamics; Fluid-structure interaction; Very good knowledge in computer programming languages; Excellent teamwork and English communication and writing skills.

Desired skills:

Boundary element method; Finite element method; Hight performance computing.

Labex team

Axis, action, part : 3.1.3 : Complex Fluids, Fluid and Biomimetic Materials, Vesicular Dynamics and Microflow

Contact: Name, surname: JAEGER Marc
Mail: marc.jaeger@centrale-marseille.fr; Phone: +33 4 13 55 40 66            Mobil: +33 6 30 93 65 00

How to apply

Send an application including:

  • A detailed CV with a list of publications
  • A cover letter
  • A list of scientific personalities able to comment on the application

to both these addresses:

Relevant group leader (marc.jaeger@centrale-marseille.fr)

Labex management (LabexConseilCoordination@irphe.univ-mrs.fr)

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Title: Diagnosis of the integrity of growing biological materials using quantitative ultrasound imaging

Duration: 1 year    Period: June 2019 – Mai 2020

Location: Marseille, France Gross salary: from 2423 € to 2843 €/month, depending on qualification and experience

Research project and job description

Summary:

Long bones and (green) wood are two living materials with similar structural characteristics. They evolve with age and adapt to environmental constraints. These changes result in complex variations. Their mechanical properties vary in time and space in successive stages from the juvenile to the mature state. The study of the quality of these materials (diagnosis) for better management of dysfunctions (care) is the subject of advanced research. Among the control/diagnosis protocols, acoustic and ultrasonic methods occupy privileged positions. For example, biomedical ultrasound is known to be appropriate in assessing the risk of femoral neck fracture in women but remains controversial for the diagnosis of children's bone pathologies [1]. For trees, there are several auscultation tools available, but they lack precision and are limited to using a single parameter to monitor the complex evolution of a tree during its growth [2]. The potential of acoustic and ultrasonic methods is still under-exploited in the biomedical and xylology fields. This project aims to fill this gap by conducting a numerical and experimental study of these two materials in terms of characterization, acoustic and ultrasonic imaging to develop in vivo or in situ monitoring systems, and provide a qualitative (resolution) and quantitative (parameters) diagnosis. The project was divided into several complementary phases, such as numerical modeling of the interaction between waves and medium, the inverse problem based on the Full Waveform Imaging approach, and the development of experimental devices.

The post-doc will take place at the Laboratory of Mechanics and Acoustics (LMA) and will be supervised by Philippe Lasaygues (lasaygues@lma.cnrs-mrs.fr) as part of the "Waves and Imaging" team.

[1] P. Lasaygues et al., Bone Quantitative Ultrasound, Springer Netherlands, 2011, pp. 441–459.

[2] A. Arciniegas et al., “Literature review of acoustic and ultrasonic tomography in standing trees,” Trees, Aug. 2014.

Job description:

Candidates must have a PhD in acoustics or mechanics, and a strong interest in research on biological and/or natural materials. Candidates will have excellent written and oral communication skills.

Essential skills:  acoustics, direct and inverse problems, numerical modelling, ultrasonic experimentation

Desired skills: signal processing, electronics

Labex team

Axis, action, part : "Heterogeneity, Multi-scale, Scale change", "Heterogeneous material characterization"

Contact: Name, surname: Sergey Gavrilyuk
Mail: sergey.gavrilyuk@univ-amu.fr

How to apply

Send an application including:

  • A detailed CV with a list of publications
  • A cover letter
  • A list of scientific personalities able to comment on the application

to both these addresses:

Relevant group leader (Lasaygues@lma.cnrs-mrs.fr)

Labex management (LabexConseilCoordination@irphe.univ-mrs.fr)

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Title: Sediment transport and dunes

Duration: 1 year    Period: 2019 / 2020

Location: Marseille, France Gross salary: from 2423 € to 2843 €/month, depending on qualification and experience

Research project and job description

Summary:

When particle beds are submitted to shearing flows, the particles at the surface of the bed can move as soon as hydrodynamic forces acting on them exceed a fraction of their apparent weight. This situation occurs in a wide variety of natural phenomena, such as sediment transport in rivers or by air, and in industrial processes, such as hydrate or sand issues in oil production and granular transport in food or pharmaceutical industries. A very common feature that arises is the formation of ripples, i.e. small waves on the bed surface, or of dunes, i.e. larger mounds or ridges. The widely recognized mechanism for dune or ripple formation is the fluid inertia or more precisely the phase-lag between the bottom shear stress and the bed waviness generated by the fluid inertia. In that case, the shear stress, the maxima of which are slightly shifted upstream of the crests, drags the particles from the troughs up to the crests. However, a complete description of the bed instability is still lacking as the coupling between the granular media and the fluid is poorly understood.

The aim of the present project is to combine experiments and theoretical or numerical approaches to gain a full understanding of the bedform origination and evolution. The first interesting questions point to the physical mechanisms involved and in particular whether there is any delay in the flux adapting to a change in the shear stress and whether this additional stabilizing mechanism as well as particle inertia and feed back production are significant. The second important issues concern the short and long term dynamics of the bedforms and more precisely the wavelength evolution and the regimes of existence of the stable bed states.

Job description:

The post-doctoral fellow will work with Pascale Aussillous in the IUSTI Particulate Flow Group in collaboration with Elisabeth Guazzelli (MSC, Paris). This project is fully involved in the action “Granular Media” of the Labex MEC, which is aimed at a better understanding of the rheology and of the flow of mixture of grains and fluid.   

The experiment involves refractive index matching techniques.

Essential skills:

The fields of expertise of the candidate should include fluid mechanics and experimental works.

Desired skills:

Skills in granular media would be appreciated

Labex team

Axis, action, part : Complex Fluid, Divided media, Granumar media


Contact: Name, surname: Aussillous Pascale
Mail: pascale.aussillous@univ-amu.fr                         Phone: + 33 (0)4 91 10 68 76

How to apply

Send an application including:

  • A detailed CV with a list of publications
  • A cover letter
  • A list of scientific personalities able to comment on the application

to both these addresses:

Relevant group leader (pascale.aussillous@univ-amu.fr)

Labex management (LabexConseilCoordination@irphe.univ-mrs.fr)

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