Science attributes the creation of the Earth's magnetic field to the movement of electricity conducting liquids in the molten core of the Earth. Researchers have recently conducted experiments to replicate and study this mechanism.
Experiments conducted in Riga (1999) revealed for the first time that a cylindrical-shaped fluid flow of metal moving in a spiralling motion can generate a slowly growing magnetic field. This was followed by the EU research project MAGDYN (2001-2005), which aimed to show how the generated magnetic field itself is capable of persisting.
The design of these experiments and the theoretical interpretation of the data relied heavily on the statistical simulation models developed by Dr. Sasa Kenjeres and Prof. Kemal Hanjalic of Delft University of Technology's Multi Scale Physics department. Moreover, their theoretical and statistical model was the first to explain and predict the observable effects in Riga.
Based on the findings of Kenjeres and Hanjalic, a new generation of experimental facilities have now been developed in the US (Los Alamos and Maryland, among other places), Grenoble and Russia (Perm). These facilities will allow the Earth's magnetic core to be replicated more realistically than ever before. The new experiments are expected to provide valuable new insights into the Earth's magnetic field.
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MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
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