Essays about: "Boltzmann equation"

Showing result 1 - 5 of 10 essays containing the words Boltzmann equation.

  1. 1. First principles investigation of the thermal conductivity of Zr, ZrC, and ZrN

    University essay from KTH/Fysik

    Author : Daniel Karlsson; [2023]
    Keywords : Electron-phonon interaction; Density functional theory; Boltzmann transport equation; first-principles; thermal conductivity; electrical resistivity; Abinit; Phono3py; Elektron-fononväxelverkan; täthetsfunktionalteori; Boltzmanns transportekvation; värmeledningsförmåga; elektrisk resistivitet; Abinit; Phono3py;

    Abstract : The thermal conductivity and electrical resistivity of Zr, ZrC, and ZrN were calculated using first-principles density functional theory (DFT) and the Boltzmann transport equation. The electron-phonon scattering was modeled via the self-energy relaxation time approximation (SERTA), and the phonon-phonon scattering via the analogous single-mode relaxation time approximation (SMRTA). READ MORE

  3. 2. Coulomb drag in parallel nanowires

    University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Author : David Dai; [2020]
    Keywords : Coulomb drag; nanowire; Physics and Astronomy;

    Abstract : In this project the transport phenomenon Coulomb drag is studied in a 1D system comprised of two nanowires in parallel. Specifically, a driving current across the active wire generated a drag current in the passive wire, and we studied how Coulomb drag influenced both the driving and drag currents. READ MORE

  4. 3. Modeling Radiation Induced Degradation of Lattice Thermal Conductivity

    University essay from KTH/Materialvetenskap

    Author : Robin Andersson; [2020]
    Keywords : ;

    Abstract : Nuclear power technology is currently experiencing a revolutionary development process and its utilization is researched and debated throughout the world whereas sustainability is one of the most important topics in the material science arena. Some components in a nuclear power plant are subject to an irradiating environment which will cause significant damage to the material over time. READ MORE

  5. 4. Boltzmann Equation and Discrete Velocity Models : A discrete velocity model for polyatomic molecules

    University essay from Karlstads universitet/Institutionen för matematik och datavetenskap (from 2013)

    Author : Olof Håkman; [2019]
    Keywords : Boltzmann equation; Discrete velocity models; Polyatomic molecules;

    Abstract : In the study of kinetic theory and especially in the study of rarefied gas dynamics one often turns to the Boltzmann equation. The mathematical theory developed by Ludwig Boltzmann was at first sight applicable in aerospace engineering and fluid mechanics. READ MORE

  6. 5. Non-Thermal Modeling Of Energy Propagation Carried By Phonons and Magnons

    University essay from

    Author : David Dahlgren; Amela Mehic; [2019]
    Keywords : phonon; magnon; Boltzmann transport equation; Heat transport; Atom;

    Abstract : Heat transport by phonons and magnons in crystals due to a local perturbation in temperature is described by the Boltzmann transport equation. In this project a one phonon one magnon system was studied in a one dimensional rod with reflective boundaries. Using the splitting algorithm the problem was reduced to a transport and collision term. READ MORE