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Treball de fi de grauData de publicació
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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/139978
Dynamics and stability of 1D patterns in active polar fluids
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Turbulence in active fluids has been proposed as a new universality class of turbulence. However, the mechanisms governing these flows are poorly understood. In this work, we study numerically the formation of uni-dimensional patterns in a minimal model for an active polar nematic fluid, for arbitrary values of the
ow alignment coeffcient v. In addition, we determine analytically the linear stability of the asymptotic states, as a function v. We describe the complete bifurcation diagram for uniform states in 1D and show the existence of transversal (2D) instabilities, in particular in the so-called flow alignment regime jvj > 1. This result shows that the secondary instabilities leading to turbulence are not specifc of the case v = 0, thus reinforcing the conclusion that active flows constitute a new universality class of turbulence.
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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2019, Tutor: Jaume Casademunt Viader
Matèries (anglès)
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ARMENGOL COLLADO, Josep-maria. Dynamics and stability of 1D patterns in active polar fluids. [consulta: 14 de gener de 2026]. [Disponible a: https://hdl.handle.net/2445/139978]