Essays about: "konvektion"

Showing result 1 - 5 of 28 essays containing the word konvektion.

  1. 1. Heat transfer analysis on LED-board in closed environment

    University essay from Malmö universitet/Fakulteten för teknik och samhälle (TS)

    Author : Victor Eneberg; Johannes Linby; [2022]
    Keywords : LED; heat sink; motorcycle; light; headlight; FEM; CFD; IR camera; thermocouple; kylfläns; motorcykel; belysning; halvljus; IR-kamera; thermoelement;

    Abstract : Motorcyclists are more often involved in accidents with severe harm or even fatal outcome compared to other road users. An experienced motorcycle driver is well familiar with the problem when the day light is reduced. The visibility is of course highly decreased. READ MORE

  3. 2. A Numerical Study of Melt Pool Heat Transfer in the IVR of a PWR

    University essay from KTH/Fysik

    Author : Yuer Zhao; [2021]
    Keywords : In-vessel melt retention; corium pool; Zr oxidation ratio; melt pool convection; CFD; SST k-ω turbulence model; Smältretention i kärlet; koriumpöl; Zr-oxidationsförhållande; konvektion i en smältpöl; CFD; SST k-ω turbulensmodell;

    Abstract : This thesis aims to provide the thermal condition of melt pool convection by CFD simulation, which is important to the assessment of the invessel melt retention (IVR) strategy widely adopted in Generation III pressurized water reactors (PWRs). As a severe accident mitigation measure, the IVR strategy is realized through external cooling of the lower head of a reactor pressure vessel (RPV). READ MORE

  4. 3. Modelling of Laser Welding of Aluminium using COMSOL Multiphysics

    University essay from KTH/Materialvetenskap

    Author : Jie Chen; [2020]
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 4. Investigation of Emission Source Heights in FLEXPART 10.02 for the Wildfire in Pedrógão Grande, Portugal, 2017

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Anton Nygren; [2019]
    Keywords : wildfire; Pedrógão Grande; structural similarity; SSIM; FLEXPART; MERRA2; CO; emission source height; skogsbränder; Pedrógão Grande; strukturell likhet; SSIM; FLEXPART; MERRA2; CO; utsläppshöjd;

    Abstract : One of the worst wildfires in Portugal in 2017 on June17- 21 started at the central part of Pedrógão Grande and spread fast to the surrounding areas Góis, Pampilhosa da Serra and Arganil. The wildfire took 64 lives and a large smoke plume was observed. READ MORE

  6. 5. Design benefits with Additive Manufacturingfrom a convective heat transfer perspective

    University essay from KTH/Flygdynamik

    Author : Joakim Storfeldt; [2019]
    Keywords : ;

    Abstract : Nowadays manufacturing processes are rapidly developing. Salt-bath dip brazing is a conventional manufacturing method commonly used by Saab AB to fuse aluminium components in a high temperature salt bath. However conventional manufacturing methods have shown some limitations. READ MORE