02/04/2021
The Human Resources Strategy for Researchers

Phd contract in the field of Earth sciences financed for three years by the University of Clermont Auvergne

This job offer has expired


  • ORGANISATION/COMPANY
    Université Clermont Auvergne
  • RESEARCH FIELD
    Geosciences
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    23/05/2021 00:00 - Europe/Brussels
  • LOCATION
    France › Aubière
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35
  • OFFER STARTING DATE
    01/10/2021
  • REFERENCE NUMBER
    SF-CD-2021-032

OFFER DESCRIPTION

An experimental approach of tsunamis generated by pyroclastic flows

Pyroclastic flows entering water are likely to generate tsunamis (e.g. Rabaul 1994, Montserrat 1997 and 2003, Stromboli 2019) but the flow dynamics at the impact with water and the parameters controlling wave generation are still poorly understood. In the state of current knowledge, the numerical modeling approach does not make it possible to understand all the physical processes linked to the interactions between pyroclastic flow, air and water. The assessment of this potentially devastating hazard at the local level is not yet possible due to this lack of knowledge and the absence of a physical model. This PhD subject proposes an experimental approach to the problem. Pyroclastic flow is assimilated to a fluidized granular flow. This gas-particle mixture is stored in a reservoir, then released along a ramp before reaching a 7 m long water channel. The device is equipped with cameras filmingat high speed (250-1000 images per second) to follow the evolution of (1) the granular flow on the ramp until its impact with water and then underwater, and (2) the wave formation and propagation. The experiments consist of characterizing the influence of initial parameters such as flow velocity, density and temperature, particle size distribution, slope, and water height in the channel. The results will be compared with known historical cases, such as Krakatau (1883), Montserrat (1997, 2003) and Stromboli (2019). Understanding the physical processes of generating a tsunami by pyroclastic flow will also improve numerical models and hazard assessment.

More Information

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Geosciences: Master Degree or equivalent
Work location(s)
1 position(s) available at
Magmas and Volcanoes Laboratory
France
Région Auvergne Rhône-Alpes
Aubière
63178
Campus Universitaire des Cézeaux, TSA 60026 - CS 60026, 6 Avenue Blaise Pascal

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EURAXESS offer ID: 623016

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