MELIGA , Philippe

Bluff bodies can be prone to well-known self-excited instability such as ă galloping. Opposite to classical and well documented Vortex Induced ă Vibrations (VIV), oscillation amplitude is not bounded in such a way ă galloping-like instability can alter the integrity of the structure on ă short term. Although stability criteria exist in the...

We analyse the force balance on a cylindrical drop in a Hele-Shaw cell, subjected to a Marangoni flow caused by a surface tension gradient. Depth-averaged Stokes equations, called Brinkman equations, are introduced and a general closed form solution is obtained. The validity of the averaging procedure is ascertained by considering a linear...

This research reports on the recent development of black-box optimization methods based on single-step deep reinforcement learning (DRL) and their conceptual similarity to evolution strategy (ES) techniques. It formally introduces policy-based optimization (PBO), a policy-gradient method that relies on a policy network to describe the density...