Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Tilgner, Andreas Prof. Dr."
Now showing items 41-49 of 49
-
Simulations of the Karlsruhe Dynamo Using the Lattice-Boltzmann Method
(2005-10-18)The dynamo mechanism is on the way of understanding. Several numerical simul ations have shown the dynamo mechanism successfully. In recent years dynamo mech anism could be brought down to ... -
Solar surface flows during active region emergence
(2022-06-16)The aim of this thesis is to improve our understanding of the emergence of magnetic flux in the form of active regions (ARs) to the solar surface. Active regions are concentrations of strong magnetic field at the surface ... -
Spatial Scaling of Large-Scale Circulations and Heat Transport in Turbulent Mixed Convection
(2013-02-18)The present study reports an experimental investigation of the scaling of large-scale coherent structures, their dynamics and heat transport in turbulent mixed convection. Based on a concept of spatial scaling, mixed ... -
Subcritical Transition to Turbulence in Shear Flows
(2014-05-23)The theme of this thesis is transition to turbulence in linearly stable shear flows. Laminar-turbulent intermittency and hysteresis are typical feature of these flows at transitional Reynolds numbers, characterizing a ... -
Superstructures, heat and momentum transport in inclined turbulent thermal convection of low-Prandtl-number fluids
(2020-09-24)Recent experiments by Vasil’ev et al. (2015a) using liquid sodium as working fluid inside an extremely slender Rayleigh-Bénard convection (RBC) cell of the diameter-to-height aspect ratio Γ = 1/20, which was inclined ... -
The solar wind’s geomagnetic impact and its Sun--Earth evolution -- Predictive models for space weather and the Parker Solar Probe orbit
(2018-11-06)This thesis addresses two current topics in solar wind research and space weather. The first study is dedicated to the solar wind's impact on geomagnetic activity and the second study to the estimation of the solar wind ... -
Theory of solar oscillations in the inertial frequency range
(2022-11-16)Recent observations have revealed that we lack a fundamental understanding of the large scale (with spherical harmonic degrees $l < 60$) flows in the Sun. Flows at these large scales are strongly influenced by rotation. ... -
Thermal Convection: Differential heating, travelling thermal waves and turbulent superstructures
(2022-05-30)Turbulent thermal convection is ubiquitous in geophysical, astrophysical, and industrial applications. In the present work, various phenomena in the convective paradigm systems of horizontal convection and Rayleigh-Bénard ... -
Untersuchungen zum Lumineszenzverhalten des Aluminiumnitrids und der Aufbau einer Kurzzeit-Lumineszenz-Spektroskopie-Apparatur
(2017-07-07)This thesis consists of three different parts. In the first part it gives the reader an overview of the published results describing near band-edge as well as defect related luminescence in aluminium nitride, also presenting ...