post doctoral (M/F) at PMMH

13 Apr 2024
Job Information

Organisation/Company

CNRS

Department

Physique et mécanique des milieux hétérogenes

Research Field

Physics

Researcher Profile

Recognised Researcher (R2)

Country

France

Application Deadline

3 May 2024 - 23:59 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

1 Oct 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

Sweeping sand, anchoring plant roots in the soil or reinforcing materials with fibers are common examples of mechanical interactions between flexible fibers and rigid grains. In these cases of fluid-structure interactions, the evolution of fiber shape results from a balance between internal elastic forces and external stresses, mainly frictional forces, imposed by contacts with the grains. However, predicting the orientation and conformation of fibers in a reorganizable granular medium remains a challenge, as stress distribution is highly heterogeneous along the fiber. Grain-fiber interactions need to be studied at the contact scale in order to predict macroscopic behavior. The post-doctoral fellow will be tasked with developing and analyzing model experiments for extracting fibers from a granular medium, mainly in two-dimensional geometry.

As part of the ANR ConFiG project, we will study the extraction of a fiber from a granular medium. The post-doctoral project will focus on two-dimensional (2D) experiments to characterize (i) the shape change and (ii) the drag force on the fiber, as well as (iii) grain reorganizations when the fiber is extracted in pressure-controlled configurations. These experiments will be complemented by DEM simulations and 3D experiments from our partners. The 2D single-fiber experiment will also be extended to a fiber network mimicking the hierarchical structure of a plant root system.

The project is funded by an ANR project (ANR ConFiG, ANR-23-CE30-0032-02) and will be carried out at PMMH, ESPCI, Paris (France) with Evelyne KOLB in collaboration with two other teams: Pierre JOP (ANR Coordinator, SVI Saint-Gobain), Jean-Yves DELENNE (INRAE, Montpellier).

Requirements

Research Field

Physics

Education Level

PhD or equivalent

Languages

FRENCH

Level

Basic

Research Field

Physics

Years of Research Experience

1 - 4

Additional Information
Eligibility criteria

Candidates must be highly motivated, with a keen interest in laboratory experiments and a background in soft matter, hydrodynamics or physical mechanics. Experience in imaging techniques and image analysis is strongly recommended. Some knowledge of experimental automation, force transducers and programming would be appreciated.

Additional comments

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Website for additional job details

https://emploi.cnrs.fr/Offres/CDD/UMR7636-FREAUG-043/Default.aspx

Work Location(s)

Number of offers available

1

Company/Institute

Physique et mécanique des milieux hétérogenes

Country

France

City

PARIS 05

Geofield

Where to apply

Website

https://emploi.cnrs.fr/Candidat/Offre/UMR7636-FREAUG-043/Candidater.aspx

Contact

City

PARIS 05

Website

http://www.pmmh.espci.fr/

STATUS: EXPIRED