Zobrazeno 1 - 10
of 5 627
pro vyhledávání: '"Giesecke, A."'
We numerically examine dynamo action generated by a flow of an electrically conducting fluid in a precessing cylindrical cavity. We compare a simplified kinematic approach based on the solution of the magnetic induction equation with a prescribed vel
Externí odkaz:
http://arxiv.org/abs/2410.14449
Autor:
Giesecke, André, Vogt, Tobias, Pizzi, Federico, Kumar, Vivaswat, Gonzalez, Fernando Garcia, Gundrum, Thomas, Stefani, Frank
We examine the fluid flow forced by precession of a rotating cylindrical container using numerical simulations and experimental flow measurements with ultrasonic Doppler velocimetry (UDV). The analysis is based on the decomposition of the flow field
Externí odkaz:
http://arxiv.org/abs/2409.17789
We reveal and analyze an efficient magnetic dynamo action due to precession-driven hydrodynamic turbulence in the local model of a precessional flow, focusing on the kinematic stage of this dynamo. The growth rate of magnetic field monotonically incr
Externí odkaz:
http://arxiv.org/abs/2312.06835
The magnetised spherical Couette (MSC) problem, a three dimensional magnetohydrodynamic paradigmatic model in geo- and astrophysics, is considered to investigate bifurcations to high-dimensional invariant tori and chaotic flows in large scale dissipa
Externí odkaz:
http://arxiv.org/abs/2306.13763
The upcoming DRESDYN (DREsden Sodium facility for DYNnamo and thermohydraulic studies) precession experiment will test the possibility to achieve magnetohydrodynamic dynamo action solely driven by precession. Here, after the description of the experi
Externí odkaz:
http://arxiv.org/abs/2301.08076
The properties of rotating turbulence driven by precession are studied using direct numerical simulations and analysis of the underlying dynamical processes in Fourier space. The study is carried out in the local rotating coordinate frame, where prec
Externí odkaz:
http://arxiv.org/abs/2210.12536
Autor:
Andrés Mesas, Víctor M. Aguilera, Carolina E. González, Ricardo Giesecke, Rubén Escribano, Cristian A. Vargas
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024)
Abstract The loss of biodiversity in marine populations is one of the consequences of the increased events of extreme environmental conditions in the oceans, which can condition the persistence of populations to future scenarios of climate change. Th
Externí odkaz:
https://doaj.org/article/9654736f00194335b143dddfa5467201
Autor:
Ulf Teichgräber, Maja Ingwersen, Max-Johann Sturm, Jan Giesecke, Manuel Allwang, Ida Herzog, Frederike von Gierke, Paul Schellong, Matthias Kolleg, Kathleen Lange, Daniel Wünsch, Katrin Gugel, Anne Wünsch, Janine Zöllkau, Inga Petruschke, Kristin Häseler-Ouart, Bianca Besteher, Swetlana Philipp, Urte Mille, Dominique Ouart, Jana Jünger, Jena Planetary Health Collaboration Group
Publikováno v:
BMC Medical Education, Vol 24, Iss 1, Pp 1-10 (2024)
Abstract Background Health professionals are increasingly called upon and willing to engage in planetary health care and management. However, so far, this topic is rarely covered in medical curricula. As the need for professional communication is par
Externí odkaz:
https://doaj.org/article/146f79c81e784e14b7da1957664da65d
Can atmospheric waves in planet-hosting solar-like stars substantially resonate to tidal forcing? Substantially at a level of impacting the space weather or even of being dynamo-relevant? In particular, low-frequency Rossby waves, which have been det
Externí odkaz:
http://arxiv.org/abs/2208.00644
The effect of the nutation angle on the flow inside a precessing cylinder is experimentally explored and compared with numerical simulations. The focus is laid on the typical breakdown of the directly forced m=1 Kelvin mode for increasing precession
Externí odkaz:
http://arxiv.org/abs/2207.10508