Fully funded PhD position at LOMC, UMR 6294 CNRS, Le Havre Normandie University

[François Marin]

Dear coastal list members,

We have a fully-funded PhD position available at LOMC (Laboratoire Ondes et Milieux Complexes) laboratory, UMR 6294 CNRS, Le Havre Normandie University, on the following topic:

Sediment transport in the presence of cohesive and non-cohesive sediments

The seabed is often made up of a mixture of cohesive fine particles (clay, silt) and non-cohesive coarse particles (sand, gravel,…). However, most previous studies have been carried out in the context of sand-type sediments (Durafour et al. 2015, Vah et al. 2020, 2022), and the current state of knowledge on the impact of the presence of fine particles, which are very often observed in situ, on seabed erosion thresholds and on sediment transport when these thresholds are exceeded, is very limited. The rheological properties of sediments are crucial for the erosion resistance of a cohesive sediment bed. A small proportion of clay in a non-cohesive environment can significantly reduce sediment transport (Bougouin et al., 2022).
The proposed work will provide a better understanding of the physical processes driving sediment transport in coastal areas. The approach used will be physical modelling based on flume tests at the LOMC laboratory. This experimental approach makes it possible to control the various hydrodynamic and sediment parameters involved. The results obtained will be very valuable for modelers using the numerical approach.

References
Bougouin, A., Benamar, A., Jarno, A., Marin, F., & Pantet, A. (2022). Rheological behaviour of pure clay and coarse-grained clay suspensions using an inclined blade vane-in-cup. Journal of Non-Newtonian Fluid Mechanics, 300, 104714. DOI : 10.1016/j.jnnfm.2021.104714.
Durafour, M., Jarno, A., Le Bot, S., Lafite, R., & Marin, F. (2015). Bedload transport for heterogeneous sediments. Environmental Fluid Mechanics, 15(4), 731-751. DOI: 10.1007/s10652-014-9380-1.
Vah, M., Jarno, A., Le Bot, S., Ferret, Y., & Marin, F. (2020). Bedload transport and bedforms migration under sand supply limitation. Environmental Fluid Mechanics, 20(4), 1031-1052. DOI: 10.1007/s10652-020-09738-6.
Vah, M., Khoury A., Jarno A., & Marin, F. (2022). A visual method for threshold detection of sediment motion in a flume experiment without human interference. Earth Surface Processes and Landforms, 1-12, DOI: 10.1002/esp.5346.

Key words : Sediment transport, fluid mechanics, physical modeling

The PhD position will begin October 01, 2024

Elements to be provided by e-mail to
francoi...@univ-lehavre.fr
anne....@univ-lehavre.fr
ahmed....@univ-lehavre.fr
for the application (Application deadline : 15 May 2024):

-CV with academic background and internships
- Letter of motivation
- Transcripts and rankings (including Semester 3 of the Master's degree), if applicable from engineering schools
- Letters of recommendation (including that of the internship supervisor of the 4th Semester of the Master, or if applicable that of the end-of-study internship supervisor in an engineering school)

Best regards,

François Marin

-- 
Pr. François Marin
Université Le Havre Normandie
Directeur du Laboratoire LOMC, UMR 6294 CNRS
UFR des Sciences et Techniques
25 rue Philippe Lebon
BP 1123
76063 Le Havre Cedex
France

Tel: +33 (0)2 35 21 71 15 / 71 18
https://lomc.univ-lehavre.fr/