Sökning: "non-equilibrium"

Visar resultat 11 - 15 av 30 uppsatser innehållade ordet non-equilibrium.

1. 11. Thermodynamical properties of cellular automata

   Kandidat-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Författare :Luca Bertolani; [2020]
   Nyckelord :Thermodynamics; Statistical; Mechanics; Cellular; automata; chaos; complex; matrix; computational; mathematical; 2d; two; dimensional; program; code; python; ising; teaching; ideal; gas; partition; function; equilibrium; non-equilibrium; classification; neighbourhood; local; Physics and Astronomy;

   Sammanfattning : Cellular automata are a set of discrete computational models whose evolution is defined by neighbourhood rules and are used to simulate many complex systems in physics and science. In this work, statistical mechanics and thermodynamics in and out of equilibrium are used to develop a five-class classification scheme for two-dimensional cellular automata. LÄS MER

3. 12. A Xenon Collisional Radiative Model for Electric Propulsion Application : Determining the electron temperature in a Halleffect Thruster

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Tarek Ben Slimane; [2020]
   Nyckelord :;

   Sammanfattning : Hall effect thrusters (HET) that rely on xenon as a propellant are widely adoptedtoday for their efficiency. To understand the kinetics of the xenon plasma dischargein the thruster, we developed a collisional radiative model for xenoninspired by the work of Karabadzhak et al. [1]. LÄS MER

4. 13. Collective behaviour in suspensions of pushers and pullers

   Master-uppsats, Lunds universitet/Biofysikalisk kemi

   Författare :Shan Anjum; [2019]
   Nyckelord :biophysics; active matter; collective motion; microswimmers; biohydrodynamics; non-equilibrium physics; low reynolds number physics; biophysical chemistry; biofysikalisk kemi; Physics and Astronomy; Chemistry; Technology and Engineering;

   Sammanfattning : Microswimmer is a term that denotes small selfpropelling agents, such as bacteria, algea or artificial robots. Depending on the flow field they set up they can be categorized into two classes: pushers (e.g. E. LÄS MER

5. 14. Nonequilibrium gauge field in Two Particle Irreducible real time formalism

   Master-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Författare :Rasmus Hansen; [2019]
   Nyckelord :Gauge field; non-equilibrium; quantum field theory; Physics and Astronomy;

   Sammanfattning : The purpose of this thesis is to study what effect a photon field has on the equations of motion and the decay of a charged scalar field in thermal equilibrium at finite temperature and outside of thermal equilibrium. To do this we calculate the two-particle irreducible effective action for the mean fields and propagators and derive their equations of motion. LÄS MER

7. 15. Observing phase changes in real time on ultrathin Iron oxide surfaces

   Master-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Författare :Harald Wallander; [2019]
   Nyckelord :CO oxidation; platinum; iron oxides; Physics and Astronomy;

   Sammanfattning : Studying catalysts under such non-equilibrium conditions is a step towards approaching more realistic reaction conditions for working catalysts. Reactivity during phase changes of ultra-thin FeO2 films grown on Pt(111) are studied in situ with Ambient Pressure X-ray Photo Emission Spectroscopy and Quadrupole Mass Spectrometry, while running the CO oxidation reaction at 160°C and 0:6 mbar. LÄS MER