Experimental study of the steady streaming around cylinders

The purpose of this project is the study of the steady streaming phenomenon induced by diff erent distributions of circular cylinders oscillating within a fluid. To understand whether this characteristic flow would be suitable for trapping micro-particles, the infuence of the main parameters governing this phenomenon was analysed, varying them within two di fferent geometrical distributions. In the fi rst one, placing two cylinders symmetrically, to extend and contrast the previous results for this case. And in the second set of experiments, a distribution of four cylinders forming a square was used instead, to analyse its outcome as it was unexplored so far. In order to achieve these objectives, several experiments were performed during this research. To recreate the conditions needed, the laboratory set-up was formed by a tank full of water and glass particles that reflect the light, a laser beam to create a visual plane, and the structure containing the cylinders. Meanwhile, a high-speed camera is in charge of capturing the position of the particles at every given period of time. After gathering all the raw data, the images were processed by several Matlab codes which are able to extract the important information about the movement of the particles and display the tendency they are following. Then, the outcome was compared and contrasted with previous experiments and numerical studies to confi rm its validity and understand its meaning. Through this analysis, it is conclude that the experiments achieved during this project can confi rm the previous hypothesis and ratify former studies. Moreover, it has been possible to provide a wider overview of the importance of the parameters that govern the steady streaming and extend the knowledge about potential uses for new distributions of circular cylinders. Ingeniería en Tecnologías Industriales