Tesis doctoral de Miguel López Caballero
In this experimental work, we have presented the causes of the slow dynamics (large scales) that appears in a fully developed turbulent flow. The appearance of this type of phenomena is very common in the atmosphere and they are often viewed as large vortices such as hurricanes, tornadoes, waves in the clouds, vortices in the rear of the aircraft, etc. Also we have included a partial rebuild of the large vortices that appear inside of the experimental system, to understand in a better way their behavior. As well we have added a complete characterization of the various parameters of the turbulence, which will serve to compare this device with current experimental systems. the main merit of this work is that it has been proved that the angular momentum of the fluid is a conserved quantity and if you inject enough energy, you can even develop a transfer mechanism of this magnitude. This was reflected in the appearance of an inverse cascade in the spatial and temporal domain of the fourier space, it is important to note that although it had been propose previously, it has never been proved. In order to explain the power law that appears, we have included a dimensional analysis which predicts the exponents found in this investigation, giving it strength to this study. We hope that this work could help to understand a little better how fluids behave, as we believe that the coupling between small scales and large scales, is key to the complete understanding of turbulence.
Datos académicos de la tesis doctoral «Large scales in a turbulent von kármán swirling flow«
- Título de la tesis: Large scales in a turbulent von kármán swirling flow
- Autor: Miguel López Caballero
- Universidad: Navarra
- Fecha de lectura de la tesis: 20/09/2013
Dirección y tribunal
- Director de la tesis
- Francisco Javier Burguete Mas
- Tribunal
- Presidente del tribunal: emilia Crespo del arco
- romain Volk (vocal)
- mickael Bourgoin (vocal)
- sergio Cuevas (vocal)
