Search for dissertations about: "Phase velocity."

Showing result 1 - 5 of 286 swedish dissertations containing the words Phase velocity..

  1. 1. Phase Doppler Anemometry in Unsteady Two-Phase Flow: A Novel Post-Processing Data Algorithm

    Author : Tobias Bergenblock; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; Circulating fluidized bed; Particle groups; Phase Doppler anemometry; Eulerian Lagrangian simulation; Particle flow measurements; Two-phase flow;

    Abstract : This thesis presents a novel method to estimate particle fluctuations in unsteady two-phase flow using phase Doppler anemometry (PDA). A comprehensive derivation and asuccessful validation of a PDA data post-processing algorithm are given. READ MORE

  2. 2. Volumetric MRI measurements of velocity and flow - Accuracy, visualisation and technical improvements

    Author : Anders Nilsson; Lund Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MRI; 4D flow; phase contrast MRI; velocity mapping;

    Abstract : In the last two decades, phase-contrast magnetic resonance imaging (PC-MRI) has evolved from two-dimensional velocity and flow measurements to volumetric, time-resolved depictions of velocity fields (4D PC). The acquisition of time-resolved velocity fields allows flow visualisations that might provide better understanding of the dynamics of the cardiac system. READ MORE

  3. 3. Some two-phase flow and boiling heat transfer characteristics in small diameter tubes

    Author : Sheng ChungHong; KTH; []
    Keywords : Two-phase flow; Heat transfer; Microscale; Small diameter tube; Bubble shape; Bubble velocity; Critical diameter for bubble rising; Film thickness; Visualisation; Boiling flow pattern;

    Abstract : .... READ MORE

  4. 4. Phase-changing flows: numerical methods and fully resolved simulations

    Author : Nicolo Scapin; Luca Brandt; Christophe Duwig; Outi Tammisola; Matthias Ihme; KTH; []
    Keywords : Phase change; interface-resolved simulations; compressibility; evaporating droplets; evaporation-driven thermal convection.; Engineering Mechanics; Teknisk mekanik;

    Abstract : Flows with evaporation and boiling are abundant in different contexts, such as geophysics, the biomedical sectors, and industrial applications. Spray combustion, boiling bubble flows, oceanic sprays, formation and evolution of clouds, spreading of infectious diseases are all relevant examples where a deeper understanding of phase-changing flows is of great importance. READ MORE

  5. 5. Mass Conserving Simulations of Two Phase Flow

    Author : Elin Olsson; Gunilla Kreiss; Stig Larsson; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; free boundary; two phase flow; level set method; conservative; Numerical analysis; Numerisk analys;

    Abstract : Consider a mixture of two immiscible, incompressible fluids e.g. oil and water. Since the fluids do not mix, an interface between the two fluids will form and move in time. READ MORE