Search for dissertations about: "pic simulation thesis"

Showing result 1 - 5 of 6 swedish dissertations containing the words pic simulation thesis.

2. 1. Numerical modeling of auroral processes

   Author : Jörgen Vedin; Kjell Rönnmark; Robert Lysak; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; space plasma physics; auroral acceleration region; auroral current circuit; Alfvén waves; parallel electric fields; equation of state; fluid simulation; PIC simulation; Space physics; Rymdfysik;

   Abstract : One of the most conspicuous problems in space physics for the last decades has been to theoretically describe how the large parallel electric fields on auroral field lines can be generated. There is strong observational evidence of such electric fields, and stationary theory supports the need for electric fields accelerating electrons to the ionosphere where they generate auroras. READ MORE

4. 2. Experimental Investigations of Wave Motion and Electric Resistance in Collisionfree Plasmas

   Author : Martin Wendt; KTH; []
   Keywords : Beam-plasma; Buneman Instability; Density gradient; Double layer; Electric field measurement; Electron beam; Electrostatic eigenmode; Finite element; HF probe; PIC simulation; van der Pol oscillator;

   Abstract : .... READ MORE

5. 3. A Simulation Approach to Plasma Waves

   Author : Etienne Koen; Tomas Karlsson; Ioannis Kourakis; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Electrostatic waves in the form of Broadband Electrostatic Noise (BEN) have been observed inthe Earth’s auroral region associated with high geomagnetic activity. Their broad frequencyspectrum consists of three electrostatic modes, namely electron plasma, electron acoustic andbeam-driven modes. READ MORE

6. 4. A Simulation Approach to High-Frequency Plasma Waves

   Author : Etienne Koen; Tomas Karlsson; Orsolya Ferencz; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Electrostatic waves in the form of Broadband Electrostatic Noise (BEN) have been observed in the Earth's auroral region associated with high geomagnetic activity. This broad frequency spectrum consists of three electrostatic modes, namely electron plasma, electron acoustic and beam-driven modes. READ MORE

7. 5. CFD modeling of biomass combustion and gasification in fluidized bed reactors

   Author : Miao Yang; Strömningsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass combustion and gasification; CFD simulation; Fluidized bed furnace; Distribution kernel method; Empirical pyrolysis model;

   Abstract : Biomass is an environmentally friendly renewable energy source and carbon-neutral fuel alternative. Direct combustion/gasification of biomass in the dense particle-fluid system is an important pathway to biomass energy utilization. READ MORE