Sökning: "particle number size distribution."

Visar resultat 11 - 15 av 37 uppsatser innehållade orden particle number size distribution..

  1. 11. Determining the Influence of the Type of Shielding Gas during Additive Manufacturing of an Aluminum Alloy by Monitoring the Process Qualitatively and Analyzing Process Byproducts Quantitatively

    Master-uppsats, KTH/Materialvetenskap

    Författare :Stefanie Desiree Kleemeyer; [2021]
    Nyckelord :additive manufacturing; PBF-LB M; aluminum; shielding gas; argon; nitrogen; helium; carbon dioxide;

    Sammanfattning : This thesis analyzes the influence of process gases on the formation and the characteristics of process byproducts that emerge during additive manufacturing of an aluminum alloy belonging to the 2000 series.  In order to address the influence, four pure gases, argon, nitrogen, helium, and carbon dioxide, were used as a shielding gas on the same parameter sets. LÄS MER

  3. 12. Influence of grain growth on the thermal structure of inner protoplanetary discs

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Sofia Savvidou; [2018]
    Nyckelord :protoplanetary disc; thermal structure; hydrodynamical simulations; grain size distribution; grain growth; opacity; iceline; Physics and Astronomy;

    Sammanfattning : Protoplanetary discs surround young stars for the first few million years after their formation and they are the birthplaces of planetary systems. The thermal structure of the discs is regulated by their dust content and the opacity that it provides. LÄS MER

  4. 13. Modellering och optimering av TMP:s kristallisator

    Magister-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Sarah Danielsson; [2018]
    Nyckelord :crystallization; kristallisation; modellering; scilab; chemical engineering; kemiteknik; Chemistry; Technology and Engineering;

    Sammanfattning : The aim of this thesis work was to create a model describing the crystallization process of sodium formate and to calibrate this model to real process data. Sodium formate is a by-product formed during the production of Trimethylolpropane (TMP). LÄS MER

  5. 14. Charging of aerosol particles - An investigation of the possibility of using Americium-241 for SMPS chargers

    Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Sofie Hansen; [2018]
    Nyckelord :SMPS; aerosol particles; Americium-241; climate change; particle number size distribution.; Earth and Environmental Sciences;

    Sammanfattning : Climate change is a fact and effects everybody on this planet, whether its humans, plants or animals. There is a comprehensive agreement about the mechanisms on how aerosol particles affect the radiative balance of the earth, but there is a need of more knowledge to fully understand climate change and the strength of the aerosol radiative forcing. LÄS MER

  7. 15. Identification and characterization of design fires to be used in performance-based fire design of CERN facilities

    Master-uppsats, Lunds universitet/Avdelningen för Brandteknik

    Författare :Darko Perovic; [2018]
    Nyckelord :Fire; Design fire; Vehicle fires; DMS 500; fast particulate analyser; Cone Calorimeter; Smoke characterization; Particle size distribution; Shell Diala; Midel; Cables; cable fires; Electrical cabinets; Electrical racks; CERN; Technology and Engineering;

    Sammanfattning : CERN operates the most complex particle accelerator facility built until today. As such, it consists of thousands of custom-made components spread both in upper ground facilities and in underground tunnels and caverns. LÄS MER