Fish In Silico with Hydrodynamic and Social Interactions Forces – FISHSIF

Solving the Navier-Stokes equation using FEEL++.


Experiments carried out on schools of small fish.

A first result concerning the passage of a school of fish through an orifice has been published in Scientific Reports 13, 10414 (2023).

The numerical hydrodynamic model of the fish is currently being completed and will soon be published.

Once the hydrodynamic fish model has been created. We're going to put together several fish that will interact socially and hydrodynamically.

Forcing a fish school through a bottleneck: a smooth evacuation

Renaud Larrieu, Philippe Moreau, Christian Graff, Philippe Peyla & Aurélie Dupont, Scientific Reports 13, 10414 (2023)

Collective movement in living organisms is a phenomenon of self-organization of a large number of individuals observed in nature from the micrometer scale (bacteria, plankton) to meters (birds) or even kilometers (school of sardines). This organization at a scale much larger than each individual is the result of interactions with the social (conspecifics), ecological (predators) and physical (obstacles, current) environment. The goal of this project is to understand how the coupling between ethodynamic and hydrodynamic interactions influence the organization of small fish schools, and how a complex environment can modify this organization. Thus, we hope to understand how the relative balance between social and hydrodynamic forces evolves with environmental conditions. To do so, our numerical simulations will combine a cognitive model with the direct resolution of 3D hydrodynamics. The construction of the physical model, in particular the balance between physical and behavioral constraints, will benefit from a constant dialogue between in vivo experiments in controlled environments and theory.