Browsing by Contributor "Meseguer Serrano, Álvaro"
Now showing items 1-20 of 21
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Análisis de estabilidad Arnoldi de las ondas de Tollmien-Schlichting en fluidos viscosos
(Universitat Politècnica de Catalunya, 2017-07)
Bachelor thesis
Open AccessEn este trabajo se estudia la estabilidad de las ondas Tollmien-Schlichting, que aparecen como una primera fase de la inestabilidad del flujo de Poiseuille plano como paso de laminar a turbulento. Se calcula la curva de ... -
Arnoldi Stability Analysis of Modulated Tollmien-Schlichting Waves in Shear Flows
(Universitat Politècnica de Catalunya, 2015)
Coursework
Open AccessThe transition of strictly two-dimensional Poiseuille flow from one-frequency amplitude-modulated states to chaotic behaviour is studied through full numerical simulation of spatially periodic channels with large longitudinal ... -
Assessing the physics of models for transition in pipe flow
(Universitat Politècnica de Catalunya, 2022-07-06)
Bachelor thesis
Open Access
Covenantee: Universität Bremen / Zentrum für angewandte Raumfahrttechnologie und MikrogravitationTransition to turbulence in pipe flow is a long standing problem in the field of turbulence research. In the route to fully turbulent pipe flow, turbulence presents itself in a wide variety of forms. In recent years, a ... -
Boundary conditions for the simulation of localized disturbances on a wind turbine blade
(Universitat Politècnica de Catalunya, 2025-02-26)
Bachelor thesis
Open Access
Covenantee: Universität BremenWind turbine blades are prone to erosion and, as a consequence, surface defects, which trigger early transition to turbulence, leading to performance losses of up to 25%. To inspect surface defects, wind turbines must ... -
Characterization of localized solutions of plane Poiseuille flow in very long domains
(Universitat Politècnica de Catalunya, 2016-05-24)
Bachelor thesis
Open AccessThe aim of this Bachelor's Thesis is the study of a particular low-energy localized plane Poiseuille solution while minimizing the error introduced by the streamwise periodicity boundary condition. The fact that the ... -
Computació de fluxos preturbulents bidimensionals al problema de Poiseuille pla
(Universitat Politècnica de Catalunya, 2012-05-15)
Minor thesis
Open AccessLa inestabilitat dels fluxos i la transició a la turbulència són fenòmens estesos a l’enginyeria i el medi natural. El problema de Poiseuille és un dels escenaris típics en dinàmica de fluids on la transició de flux lamina ... -
Digital control of pre-turbulent flows in a Taylor-Couette device
(Universitat Politècnica de Catalunya, 2019-07-09)
Bachelor thesis
Open AccessTransition to turbulence is one of the oldest problems yet to be solved in physics and engineering. Certain fluid systems are known to undergo a laminar-turbulent transition through a deterministic route of laminar flows ... -
Dinàmica d'ions a la magnetosfera de la Terra
(Universitat Politècnica de Catalunya, 2020-07)
Bachelor thesis
Open AccessEn aquest treball s'explora el problema de Störmer. Aquest tracta de l'estudi de les trajectòries dels ions en influència del camp magnètic terrestre. S'ha dut a terme a partir de l'expressió del lagrangià de la partícula ... -
Exact coherent structures in the transitional regime of shear and centrifugal flows
(Universitat Politècnica de Catalunya, 2022-04-22)
Doctoral thesis
Open AccessTurbulence is one of the major concerns for most technological problems involving fluid motion. Specially in aeronautics, a turbulent boundary layer results in structural stresses, vibrations and higher aircraft drag, ... -
Homotopic D2-symmetry breaking of bifurcation scenarios of the four-sided lid driven cavity flow problem
(Universitat Politècnica de Catalunya, 2024-07-09)
Master thesis
Restricted access - confidentiality agreementThe four-sided lid-driven cavity flow problem is of high interest for two main reasons: it is a benchmark in computational fluid mechanics for validating different numerical solvers of the Navier-Stokes equation, and it ... -
Large eddy simulation of the combustion in an oxygen-paraffin hybrid rocket engine
(Universitat Politècnica de Catalunya, 2019-06)
Bachelor thesis
Open Access
Covenantee: Zentrum für angewandte Raumfahrttechnologie und MikrogravitationEn la última década se ha despertado un renovado interés en los cohetes híbridos debido a su bajo precio, manejo seguro y compatibilidad con carburantes verdes. Un grupo de estudiantes está desarrollando un cohete híbrido ... -
Limit cycles in square cavity flow driven by the simultaneous motion of its four lids
(Universitat Politècnica de Catalunya, 2024-10-31)
Master thesis
Open AccessThe cavity flow problem is of high interest for two main reasons: it is a benchmark in computational fluid mechanics for validating different numerical solvers of the Navier-Stokes equation, and it acts as a test benchmark ... -
Modelling the cardiovascular system: pulsating flow through a collapsible channel
(Universitat Politècnica de Catalunya, 2017-05)
Bachelor thesis
Open AccessThe interaction between fluid flows and the deformation of solid structures is important in many engineering applications, as in turbochargers, wind turbines or airplane wings. The flow of blood in the body is also an ... -
Non-linear fluid dynamics in oscillatory cylindrical cavities
(Universitat Politècnica de Catalunya, 2013-06-28)
Doctoral thesis
Open AccessEven though the transition to turbulence has been studied for over a century, its complete comprehension still remains unclear even for the simplest flows and continues to be a daunting challenge for the scientific community. ... -
Periodically forced extensional pipe flow
(Universitat Politècnica de Catalunya, 2020-07)
Bachelor thesis
Open AccessThis project studies the flow of a fluid inside an infinite pipe with periodically forced extensional walls in the axial direction. The Navier-Stokes equations for an incompressible fluid inside the pipe are solved to ... -
Study of the effect of viscosity in drop breakup in turbulent flow
(Universitat Politècnica de Catalunya, 2021-07-12)
Bachelor thesis
Open Access
Covenantee: Universität BremenThe systems formed by two immiscible liquids such as emulsions are of great interest in industrial processes, the emulsion formation process occurs depending on the phenomenon of the breakup of the drops of one of the ... -
The Kuramoto-Sivashinsky equation
(Universitat Politècnica de Catalunya, 2021-06-04)
Coursework
Open AccessThe Kuramoto-Sivanshinsky equation is studied thoroughly by numerical integration. The rst section demonstrates the study's motivation and historical relevance. Rigorous mathematical analy- sis is made on how to approach ... -
Transition to turbulence of pulsatile flow through a 180º bent pipe
(Universitat Politècnica de Catalunya, 2024-07-10)
Bachelor thesis
Open Access
Covenantee: Zentrum für angewandte Raumfahrttechnologie und MikrogravitationPhysiological flows in the aorta depend on a lot of factors including the pulsatile nature of the flow, the complex geometries present or the elasticity of the vessels walls among others. The study of these dynamics is of ... -
Transitional coherent structures in shear and centrifugally driven flows
(Universitat Politècnica de Catalunya, 2023-09-21)
Doctoral thesis
Open Access(English) Turbulence is not only omnipresent in our daily lives but also in engineering applications. However, not until the middle of the XXth century researchers began to realize that simple, relatively large-scale ... -
Turbulence transition in pulsatile pipe flow with small curvatures
(Universitat Politècnica de Catalunya, 2024-07-10)
Bachelor thesis
Open Access
Covenantee: Universität BremenThe presence of irregular flows in our circulatory system may contribute to the development of cardiovascular diseases, which represent a significant threat to human health. Nevertheless, cardiovascular flows are extremely ...
