[MUSIC] Hello. What is fluid solid interactions? It is what happens when the motions of a fluid and of a solid are somehow coupled. This happens all the time around you. When leaves flutter on the wind, inside you, when your heart beats, above you, when the wings of a plane vibrate, and even under the sea. Everywhere. Have you ever wondered how these interactions work? I have. My name is Emmanuel de Langre, I'm a professor at Ecole Polytechnique near Paris in France. I've always been fascinated by the huge variety of ways fluids and solids can interact, in natural or man-made systems. As an engineer, I often needed to compare formulas and models of fluid-solid interactions before using them And I know it is not that easy. With colleagues from all around the worl, I have been teaching courses, writing books, and editing journals right on this topic, fluid-solid interactions. The idea behind this book is to give you the basic tools to be able to predict, and eventually mitigate things called flutter, galloping, sloshing, vortex-induced vibrations, added mass to cite a few. We are going to consider any possible domains of application, such as civil engineering, aerospace engineering, nuclear engineering, ocean engineering, biomechanics, and even food processing. This is why we call the course, fundamentals of fluid-solid interactions. There are so many phenomenons, so many models, that we need to work together on the basic mechanisms. There is a whole team that is going to help you. Here are Oliver and Xavier. >> Hello. I will show you experiments related to the course, to let you see what happens in reality, not just in equation. We prepared the experiments for you, and I will guide you to explain what happens, and the connection to the lectures. >> To take advantage of this course, we'll go through progressive evaluation and peer reviewed projects. There are plenty of materials in this course that I have prepared for you. >> And I will be giving the lectures. We will go step by step to help you on the path. Other colleagues have prepared what we called research reports for you, so that you can see some examples of what's going on right now in fluid-solid interactions in the labs. Lo�c is working on leaves, Camille on drops, Sebastien on energy harvesting, Bruno on sponges and muscles. [MUSIC] To fully benefit from this course, you will need some background in dynamics and in fluid mechanics. So I would say that this is a graduate level course. We have built it for students, for engineers and scientists, but also, for any curious minds. If you want to see how fluid-solid interactions work, and be able to use that knowledge, join us. We look forward to seeing you in the course and work together. [MUSIC]