Sökning: "VOF"

Visar resultat 1 - 5 av 33 uppsatser innehållade ordet VOF.

  1. 1. Computational Fluid Dynamics and Modeling of a Free Surface Flow

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Mathieu Marmier; [2023]
    Nyckelord :CFD; Free Surface Flow; VOF; STAR-CCM ; Multiphase Simulation; Nuclear Engineering; Fluid Mechanics;

    Sammanfattning : This project deals with the CFD modelling of a free surface flow. The aim is to develop and validate a fast and accurate numerical model for stratified two-phase flows. Volume of Fluid (VOF) multiphase model is employed. The purpose is to use the developed numerical model for the design of an element within a compact nuclear reactor. LÄS MER

  3. 2. Computational Analysis of Spray Deflector Designs

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Osman Gyokhan Ali; [2023]
    Nyckelord :Planing Hulls; Spray Deflector; Hull Modification; Computational fluid dynamics CFD ; resistance; trim angle; heave; CD-adapco Star CCM ; Numerical Ventilation; Phase Replacement; Modified HRIC Scheme; Volume Fraction Source Term; Reynolds averaged Navier-Stokes RANS ; Volume of Fluid VOF ; SST K-Omega Turbulence Modelling; Höghastighetshantverk; modelldesign; spraydeflektor;

    Sammanfattning : Planing hull is a common hull design concept which decreases the resistance while speed is increasing for a specific speed range. It is also suitable for hull modifications to achieve higher efficiency. Spray deflector is a promising hull modification which offers extra resistance decreasing and less vertical acceleration for planing hulls. LÄS MER

  4. 3. Flow modeling and bank erosion downstream due to spillway discharge : Independent thesis Advanced level (professional degree) 30 ECTS credits

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för beräkningsvetenskap

    Författare :Alexander Lindblad; [2022]
    Nyckelord :Ansys Fluent; Multiphase Flow; Spillway; CFD; Volume of Fluid; Reynolds-averaged Navier-Stokes;

    Sammanfattning : Dam spillways and downstream areas are used to guide large flows of water during for example heavy rainfall. The large flows give way to turbulent pattern sand velocities that may damage the river banks or the dam structure. Investigation of these water patterns at certain flows are therefore done to examine at risk areas. LÄS MER

  5. 4. Konspirationsteorier, alternativmedicin, vidskepelse och rasism : En studie om trossystem i VoF-undersökningen

    Kandidat-uppsats, Uppsala universitet/Statistiska institutionen

    Författare :Måns Wallström; [2022]
    Nyckelord :structural equation model; factor analysis; MIMIC; SEM; strukturell ekvationsmodell; faktoranalys;

    Sammanfattning : In this study, data from the survey Vetenskap- och Folkbildningsundersökningen 2021 on belief in conspiracy theories, alternative medicine, superstition and racist ideas was analyzed using a multiple causes, multiple indicators structural equation model. It was found that viewing stances on the selected survey questions as a manifestation of these 4 belief systems (belief in conspiracy theories, belief in alternative medicine, superstition, and racism) is supported by the data, and that the belief systems are statistically significantly correlated. LÄS MER

  7. 5. Wading Simulations of Complete Heavy-Duty Vehicles

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Emma Samuelsson; Sofie Benzler; [2022]
    Nyckelord :CFD; Volume of Fluid; Wading; Heavy-Duty Vehicles; STAR-CCM ;

    Sammanfattning : Wading is the phenomenon where a vehicle drives through water with a relatively deep water level. Sincea large portion of the vehicle is submerged in water it can affect the driveability and function of individualcomponents. LÄS MER