F23 - Marine and river
current energy converters

Organizer: B. Paillard

Benoit Paillard is currently an industrial and academic researcher in fluid mechanics applied to wind turbines. He obtained his PhD in 2010 from the French Naval Academy, working on numerical simulation and optimization of a crossflow turbine with active cyclic pitch control. His main activity is now flow modelization of wind turbines with open source codes, with a strong focus on rotor aerodynamics: computational flow analysis in 2D, 3D, steady, unsteady, MRF, sliding interfaces, RANSE, DES, LES.

Turbine/array/wake modelling and tests
Design and flow control
Environmental impacts
Computational Fluid Dynamics
Flow Structure Interactions
Transitional Flows
Turbulence Modelling & Simulation

Among the diverse range of marine energy technologies proposed- wave, thermal, osmotic, to name only a few- hydrokinetic energy is probably the most advanced in terms of the number of prototypes and pilot units in development. Nevertheless, many challenges remain to achieve the efficiency and robustness demands before a wide-scale roll-out would be realized. Development cost and environmental impact are two other factors that are crucial to the long-term success of these devices. These challenges include complex flow physics; intricate rotational machinery; exposure to extreme environments; in order to tackle these issues it is necessary to form concerted and coordinated multi-disciplinary efforts.

The objective of this forum is to share the best scientific and technical knowledge to address the issues cited above.

Non-exhaustive list of suggested Topics:

- Prototypes and arrays developments at full or reduced scale - building and installation - performance and reliability

- Numerical methods for multi-physics design; including fluid, structural, electrical, thermal and environmental aspects.

- Enhanced flow control devices: flexible or variable pitch blades, careening device, blade roughness and flow-adaptive coatings, smart structures and morphing

- Synthetic Turbulence to evaluate sensitivity to free-stream unsteadiness, wave effects, sea (or river) ,bottom boundary layer effects on performances and wakes.

- Advanced numerical tools to evaluate these devices including turbulence and transition modelling, fluid-structure interactions and free surface capabilities (RANS, Hybrid, LES, DNS, vortex, SPH)

- Design of Farms/arrays: numerical and experimental investigations of blockage and efficiency improvements, river, tidal or ocean farm performance modelling

- Environmental impacts: fish and mammals, flotsam, scour, aging, medium and large scale farms impacts on current, sea level, evaluation of the energy resource etc...