Sökning: "RANS"

Visar resultat 1 - 5 av 84 uppsatser innehållade ordet RANS.

  1. 1. Development of a CFD Boundary Condition to Simulate a Perforated Surface

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Medet Kiflemariam; [2021]
    Nyckelord :Computational Fluid Dynamics; CFD; Boundary Condition; Bleed; Aerospace Engineering; Aeronautical Engineering; Physics;

    Sammanfattning : In aircraft with jet propulsion engine intakes at supersonic speed, strong pressure waves referred to as shockwaves occur, which may interact with any present boundary layers along the intake surface. The adverse pressure gradients associated with Shock Wave-Boundary Layer Interaction (SWBLI) may cause boundary layer flow separation, which can result in disturbances of the flow that can be harmful to the device or decrease engine performance. LÄS MER

  2. 2. Validating results from the Molten Salt Reactor Experiment by use of turbulent CFD simulations : A study of a modified U-tube shell-and-tube primary heat exchanger and radiator with molten salts

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Malcolm Akner; [2021]
    Nyckelord :CFD; MSRE; CAD; CHT; experiment; molten; liquid; salt; fluid mechanics; mechanics; fluid; LTU; nuclear; reactor; nuclear reactor; generation four; generation IV; copenhagen atomics; copenhagen; atomics; space engineering; space; engineering; aerospace; thesis; master s thesis; master s; Malcolm; Akner; Erik; CFD; MSRE; CAD; CHT; flytande; salt; strömningslära; strömningsmekanik; fluid; fluidmekanik; LTU; kärnreaktor; generation fyra; generation IV; copenhagen atomics; rymdteknik; flygteknik; ingenjör; civilingenjör; examensarbete; Malcolm; Akner; Erik;

    Sammanfattning : Background Nuclear reactors utilizing molten fuels rather than solid fuels show a massive advantage in energy yield, waste handling and safety features. The only successful reactor utilizing a molten fuel was called the ‘Molten Salt Reactor Experiment’ (MSRE), built and operated in the Oak Ridge national laboratory (ORNL) in Tennessee, U.S.A. LÄS MER

  3. 3. Undertray Design and Development Procedure with CFD : An Optimization Study of Different UndertrayDesigns with CFD Computations

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Aaron Poutiainen; [2021]
    Nyckelord :;

    Sammanfattning : Race car aerodynamics has played a vital part to improve lap times over the years of motor racing. Having good road adhesion with slick tires and aerodynamic downforce will increase the vehicles maximum lateral force and thus higher cornering speeds can be achieved. LÄS MER

  4. 4. Study of flow fields in mixing tanks with particles using CFD

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Sergio Poveda Ruiz; [2021]
    Nyckelord :Keywords: Solid-liquid mixing; particle suspension; aseptic tanks; stirrer geometries; flow fields; URANS; particle modeling; LPT; DEM.; Technology and Engineering;

    Sammanfattning : The demand for food products with particles has increased in the last decades. Among them, yoghurt with fruit pieces or cereals can be found. Thus, the food processing industry is facing important challenges to offer these products to meet the quality requirements. LÄS MER

  5. 5. Scalable Distributed Reinforcement Learning for Radio Resource Management

    Master-uppsats, Linköpings universitet/Tillämpad matematik; Linköpings universitet/Tekniska fakulteten

    Författare :Frida Svensson; [2021]
    Nyckelord :Machine learning; Artificiial Intellegence; Telecommunication;

    Sammanfattning : There is a large potential for automation and optimization in radio access networks (RANs) using a data-driven approach to efficiently handle the increase in complexity due to the steep growth in traffic and new technologies introduced with the development of 5G. Reinforcement learning (RL) has natural applications in RAN control loops such as link adaptation, interference management and power control at different timescales commonly occurring in the RAN context. LÄS MER