Sökning: "Sub-channel"

Hittade 4 uppsatser innehållade ordet Sub-channel.

  1. 1. Investigation of coarse-grid CFD approach for nuclear engineering application

    Master-uppsats, KTH/Fysik

    Författare :Michela Casarella; [2023]
    Nyckelord :Thermal-hydraulics; Nuclear reactor; CFD; Sub-channel; Coarse-grid; Turbulence; Pressure drop; Termisk-hydraulik; kärnreaktor; CFD; underkanal; grovkornigt nät; turbulens; tryckfall;

    Sammanfattning : In this thesis, an innovative coarse grid CFD approach is developed that aims toexploit the capabilities of sub-channel codes and CFD methods while overcoming theirlimitations. In the approach, a very coarse mesh is implemented in the CFD softwareOpenFOAM and a new wall treatment, based on the traditional concept of the wallfunction, is applied to the wall boundary conditions of the domain to take into accountthe low resolution of the grid which does not allow to effectively capture the effect of thesolid walls on the thermo-hydraulics of the flow. LÄS MER

  3. 2. Thermal Hydraulics Simulations for Nuclear Energy

    Master-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :Wilhelm Thunberg; [2022]
    Nyckelord :Simulation; Thermal Hydraulics; Nuclear Energy; CFD; Sub-channel; System Codes; Trace; Cobra; DNS; LES; RANS;

    Sammanfattning : .... LÄS MER

  4. 3. Application of sub-channel thermal-hydraulic analysis to core calculations with POLCA8 and VIPRE-W

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik

    Författare :Larisa Castellanos Alvarez; [2019]
    Nyckelord :nuclear physics; westinghouse; POLCA; Vipre; BWR;

    Sammanfattning : This report investigates the steps of a one-way coupling between two simulation codes developed by Wesinghouse Electric Sweden AB. The Westinghouse POLCA8 is a three dimensional steady-state diffusion theory code used for simulating the neutronic, thermal and hydraulic behavior of a reactor core. LÄS MER

  5. 4. Ad Hoc Network Nodes Scheduling using DS and FH CDMA

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Farhan Khan; Muhammad Umer Khan and Noman Ellahi; [2013]
    Nyckelord :Ad Hoc Network; Node Scheduling; FH-CDMA; DS-CDMA;

    Sammanfattning : Nowadays most communication networks like GSM, WLan or WiMAX are based on pre-existing infrastructure. These infrastructures are complicated, costly and difficult to deploy in very short time. Whereas Wireless Ad Hoc Networks are infrastructure-free self organizing networks which consist of co-operating nodes. LÄS MER