Projects

The research in this thesis is centered around the study of black holes and stars. The objects of study typically have extremely strong electromagnetic fields governing their macroscopic dynamics. They often expel highly energetic outflows as a distinctive feature. Explosive flares, resulting from the release of magnetic energy in the form of relativistic particles are an important example of such outflows. Both the surroundings of the ...

Magnetic reconnection is a fundamental plasma process, allowing for the explosive energy release of magnetic field energy into plasma kinetic energy, and is ubiquitous in nature. Although significant progress has been made over several decades, a number of outstanding questions in reconnection physics are still open. One crucial concern is how the local kinetic scale process near reconnection sites couples to the large-scale process far away ...

According to satellite observations, a small fraction of particles in the near-Earth space is far more energetic than expected: some events must accelerate them in ways which are not completely understood. We want to investigate here a process, magnetic reconnection, which is well known for causing particle acceleration. However, it is not completely clear where, how and up to which energies magnetic reconnection accelerates particles. ...

With the rapid advancement of technology and scientific knowledge, we witness every day tremendous progress in various fields of research and development leading to a better understanding of the world around us and opening up new avenues for exploration. Within the process, a growing reliance has emerged on cutting-edge numerical methods, as the most cost-effective tool, to conduct accurate simulations of complex problems. \\
The present ...

In this thesis, we study magnetic flux rope (MFR) formation and eruption driven by photospheric converging motion. Two-and-a-half-dimensional magnetohydrodynamics (MHD) simulation and forward modelling analysis are conducted.

Chapter 1 introduces general research background. In Section 1.1, the structure and evolution of the Sun, the solar radiation feature, and the properties of solar magnetic fields are summarised. Section 1.2 reviews ...

Within the framework of C1 TRACESpace, this project will further develop the multi-fluid/Maxwell plasma computational model in COOLFluiD. This model allows for investigating the effects of collisions, chemical processes (ionization, recombination, charge exchange), anisotropic transport and radiation in weakly-to-fully ionized plasmas which cannot be characterized by traditionally used single-fluid MHD models. Following preliminary studies of ...

As the most common, fundamental state of matter in the universe, plasmas are observed in a variety of phenomena, ranging from small-sized fusion experiments to gas clouds on stellar and interstellar scales. As a consequence, an assortment of models exists to describe plasma behaviour on different scales. Within each model the natural oscillations and instabilities supported by a particular plasma configuration can be studied to interpret the ...