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Portail > Offres > Offre UMR7327-MARROU0-029 - Post-doctorant H/F- Impact du transport colloidal dans les milieux poreux non-saturés : du nano à l'échelle de Darcy

Postdoc vacancy M/f - Colloidal transport impact on two-phase flow in geological porous media: from nano to Darcy-scale

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 19 décembre 2022

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General information

Reference : UMR7327-MARROU0-029
Workplace : ORLEANS
Date of publication : Monday, November 28, 2022
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 6 January 2023
Proportion of work : Full time
Remuneration : Between 2805 and 3963 € gross monthly
Desired level of education : PhD
Experience required : Indifferent

Missions

We are looking for talented postdoctoral fellows (up to 3 positions) to investigate two-phase flow colloidal transport in porous media from nano to Darcy-scale. The position is part of the European Research Council-founded project COCONUT.

The COCONUT project: Colloids (including nanoparticles, bacteria, and fine particles) have an incredible potential to remobilize contaminants trapped by capillary forces in porous media and then remediate polluted groundwater. Their use in daily engineering, however, is still underexploited because the lack of knowledge regarding the transport mechanisms is an obstacle to precise control of two-phase flow. An in-depth understanding of colloidal transport mechanisms in geological porous media is crucial to assess their fate as well as their environmental and economic impact.
The COCONUT project (awared with a ERC Consolidator grant) aims to investigate how colloidal particles control two-phase flow in geological porous media using a combined experimental-simulation multi-scale approach. We are looking for talented postdoctoral fellows to join our team.
Candidates and research topics:
The project is at the interface of several scientific disciplines and candidates with various backgrounds are encouraged to apply. Expected skills include fluid dynamics, flow and transport in porous media, physico-chemistry of interfaces, colloidal science, mathematical upscaling, molecular dynamics simulations, computational fluid dynamics, microfluidics, and microtomography imaging.

Activities

The candidate will enroll in one of the following lines of research:
• Topic 1: From nano to microscale: how to estimate the energy interaction that control colloid attachment/detachment to fluid-fluid interface and to mineral surfaces? High-resolution simulations (e.g. molecular dynamics, Poisson-Boltzmann simulations) and lab measurements will probe the energy potential involved in various electro-chemical conditions.
• Topic 2: What are the key parameters controlling fluid remobilization at the pore-scale in the presence of colloidal particles? Pore-scale simulations (e.g. CFD and computational microfluidics) and microfluidic experiments will bring new insights into the complex interplay between colloid transport and deposition, and permeability reduction leading to a better control of injection towards target regions.
• Topic 3: Can we visualize in-situ the underlying processes (i.e. clogged pore, particle transport and fluid phase distribution) using X-ray microtomography imaging (lab and synchrotron measurements)?
• Topic 4: Development of an multi-scale simulator (OpenFOAM-based) for colloidal transport and two-phase flow in geological porous media. The candidate will develop efficient and reliable coupled numerical models (e.g. code development, mathematical upscaling) that combine multi-phase hydrodynamics and electro-chemical interactions to describe the transport of colloidal particles at the various scale of interest.

Skills

You have a PhD's degree in Fluid Dynamics, Flow and Transport in Porous Media, Computational Science, microfluidics, microtomography imaging, molecular dynamics, colloid and interface science. Knowledge of OpenFOAM and interest in geochemistry are a plus.
The candidate will:
 Review the literature on theory, experiments and numerical modeling of colloidal transport in unsaturated porous media,
 Conduct research related with topic 1, 2, 3 or 4 (see above),
 Participate actively to the Porous Media Research Group activities,
 Publish your results in high-impact scientific journals and participate in international conferences.

To apply, send a CV, a cover letter, one or two recommendation letters and a research statement (max 2 pages) related to one of the research topic described above.

Work Context

The position is located at the Earth Sciences Institute of Orléans (ISTO) in France. ISTO is a joint research laboratory between CNRS, the University of Orléans, and BRGM located on the Geosciences campus of Orléans close to Paris, France. The Porous Media Research Group develops cutting-edge research and worldwide recognized expertise on multi-scale modelling and microfluidic experiments of multiphase flow and reactive transport in geological formations. Our objective is to decipher the mechanisms involved in the remediation of contaminated groundwater, in the underground storage, and in new energy vectors based on the use of the subsurface.
The candidate will join a network of leading-edge national research institutions including CNRS, BRGM, Sorbonne University, Geosciences Rennes, and Université de Pau et des Pays de l'Adour, and international collaborations including Heriot-Watt University, Julich Forschungszentrum, Ghent University, TU Delft, Lawrence Berkeley National Lab, Princeton University, and Stanford University.

Additional Information

The postdoc fellowship is 2-year position (1-year contract renewable)

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