Missions

The recruited researcher will study the interaction of a single fluid vortex and a liquid/gas interface in various configurations through theoretical/numerical modelling and stability analyses.

Activities

The following configurations will be analysed :
- a horizontal fluid vortex below an external liquid/gas interface.
- a fluid vortex with a gas cavity in the axis region, i.e., a two-phase vortex, where the only interface is located inside the vortex core.
- a two-phase vortex below an external liquid/gas interface.
Quasi-steady solutions will be derived for these configurations, and their stability with respect to long- and short-wave vortex perturbations will be investigated. The results will be compared to those obtained from water channel experiments and numerical simulations carried out by other participants in this project.

Skills

PhD in physics, engineering or related fields. Solid background in aerodynamics, vortex dynamics and possibly two-phase flows. Experience in theoretical stability analysis and use of asymptotic methods. Knowledge of numerical simulation is a plus. Good oral and written communication skills in English (delivering presentations, writing scientific articles).

Work Context

This work is part of a collaboration between the Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE) in Marseille, the Institut Jean le Rond d'Alembert in Paris and the Laboratoire de Mécanique des Fluides et d'Acoustique in Lyon. The postdoc position is based at IRPHE Marseille, with several planned visits to Paris and Lyon.

The position is located in a sector under the protection of scientific and technical potential (PPST), and therefore requires, in accordance with the regulations, that your arrival is authorized by the competent authority of the MESR.

Constraints and risks

No specific constaints or risks.