Sökning: "CFD-modell"

Visar resultat 6 - 10 av 15 uppsatser innehållade ordet CFD-modell.

  1. 6. Modelling of Laser Welding of Aluminium using COMSOL Multiphysics

    Master-uppsats, KTH/Materialvetenskap

    Författare :Jie Chen; [2020]
    Nyckelord :laser welding process; aluminium alloy; thermal-mechanical; COMSOL Multiphysics; hot cracking; thermal model; CFD model; mechanical model; Marangoni effect; lasersvetsningsprocess; aluminiumlegeringar; termisk-mekanisk; COMSOL-flerfysik; hetsprickning; termisk modell; CFD-modell; mekanisk modell; Marangoni-effekt;

    Sammanfattning : This thesis presents a modelling approach of laser welding process of aluminium alloy from the thermo-mechanical point of view to evaluate the occurrence of hot cracking based on simulation results and relevant criteria. The model was created stepwise in COMSOL Multiphysics, starting with the thermal model where heat conduction of solid and liquid phase was computed. LÄS MER

  3. 7. Cooling Potential of Methane in Rocket Nozzle Cooling Channels : A Conjugate Heat Transfer Analysis

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Marcus Pettersson; [2019]
    Nyckelord :;

    Sammanfattning : The use of hydrocarbons as fuel in rocket propulsion has been of great interest to the aerospace industry in recent years. Specifically, natural gas with a high content of methane has taken the interest of several actors, among them Sweden-based GKN Aerospace who in collaboration with KTH Royal Institute of Technology have started the MERiT project. LÄS MER

  4. 8. Experimental and CFD Study of Heat Pickup in Cooling System Hoses

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :August Borg; Michael Owen; [2019]
    Nyckelord :;

    Sammanfattning : This thesis investigates a process known as heat pickup which occurs in vehicle cooling system hoses. Heat pickup is an unwanted side effect of temperature differences in a car underhood compartment, whereby excess heat is tranferred into the coolant running through the cooling system hoses, affecting its operating temperature. LÄS MER

  5. 9. Machine Learning for Air Flow Characterization : An application of Theory-Guided Data Science for Air Fow characterization in an Industrial Foundry

    Master-uppsats, Karlstads universitet

    Författare :Robin Lundström; [2019]
    Nyckelord :Machine learning; ML; Echo State Map; ESM; Echo State Network; ESN; Gaussian Process; GP; Computational Fluid Dynamics; CFD; Theory-Guided Data Science; TGDS; Physics-Guided Data Science; Data science; Cross-discipline; Hybrid model; MatLab; Maskininlärning; ML; Echo State Map; ESM; Echo State Network; ESN; Gaussiska Processer; GP; Beräkningsströmningsdynamik; CFD; MatLab;

    Sammanfattning : In industrial environments, operators are exposed to polluted air which after constant exposure can cause irreversible lethal diseases such as lung cancer. The current air monitoring techniques are carried out sparely in either a single day annually or at few measurement positions for a few days. LÄS MER

  7. 10. CFD Simulation of MQL with low temperature and high-pressure coolant

    Master-uppsats, KTH/Industriell produktion

    Författare :Venkata Raghurama Swaroop NADELLA; [2018]
    Nyckelord :Temperature; Pressure; Fluid flow; Heat transfer; Cutting fluid; Coolants; Velocity; Simulation; Temperatur; Tryck; Vätskeflöde; Värmeöverföring; Skärvätska; Kylmedel; Hastighet; Simulering;

    Sammanfattning : Att använda stora mängder skärvätskor vid en bearbetningsprocess har potentiellt negativ inverkan inte bara för operatören men också på miljön. Utöver detta tillkommer ökade kostnader för tillverkningsprocessen. LÄS MER