Search for dissertations about: "Reynolds Average Navier-Stokes RANS"

Showing result 1 - 5 of 6 swedish dissertations containing the words Reynolds Average Navier-Stokes RANS.

  1. 1. Methodologies for RANS-LES interfaces in turbulence-resolving simulations

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Sebastian Arvidson; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; zonal RANS-LES; aeronautics; RANS-LES interfaces; Hybrid RANS-LES; grey-area mitigation; log-layer mismatch; embedded LES; LES length scale; LES;

    Abstract : Hybrid Reynolds-Average Navier-Stokes (RANS)-Large-Eddy Simulations (LES) techniques are now seen by the aeronautical industry as the most promising turbulence-resolving approaches for complex high-Reynolds-number turbulent flows with regard to cost and accuracy. However, connecting RANS and LES simulated flows is a challenging task and needs special attention in order to increase simulation robustness and accuracy. READ MORE

  2. 2. A body force method for high precision offshore wake modelling simulations

    University dissertation from Uppsala : Uppsala universitet

    Author : Nikolaos Simisiroglou; Uppsala universitet.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wind power; Offshore wind farm; Wakes; Actuator disc method ACD ; Computational fluid dynamics CFD ; Reynolds Average Navier-Stokes RANS ; WindSim; PHOENICS;

    Abstract : .... READ MORE

  3. 3. Predicting flow-generated noise from HVAC components

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Oscar Kårekull; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flow noise; noise prediction; HVAC; flödesalstrat ljud; bullerprediktion; HVAC;

    Abstract : More energy efficient fans, i.e. larger sizes running at lower speeds, in Heating Ventilation and Air Conditioning (HVAC) systems decrease the fan noise and increase the importance of flow generated noise in other system components, e.g. READ MORE

  4. 4. Numerical Investigation of Unsteady Crosswind Aerodynamics for Ground Vehicles

    University dissertation from Stockholm : KTH

    Author : Tristan Favre; KTH.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aerodynamics; Vehicle Aerodynamics; Unsteady Aerodynamics; Crosswind; Unsteady Crosswind Aerodynamics; Detached-Eddy Simulations; DES; TECHNOLOGY Engineering mechanics Vehicle engineering; TEKNIKVETENSKAP Teknisk mekanik Farkostteknik; TECHNOLOGY Engineering mechanics Fluid mechanics; TEKNIKVETENSKAP Teknisk mekanik Strömningsmekanik;

    Abstract : Ground vehicles are subjected to crosswind from various origins such as weather, topography of the ambient environment (land, forest, tunnels, high bushes...) or surrounding traffic. READ MORE

  5. 5. CFD Simulations for Film Cooling Reduced Models at Engine Like Conditions

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Andreas Bradley; Linköpings universitet.; Linköpings universitet.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : In gas turbines some parts are exposed to combustion gases with temperatures well above the melting temperature of the material. Therefore, various cooling techniques are utilized in order to protect the parts exposed to these hot gases. One such technique, film cooling, is a common and well established way to protect the exposed parts. READ MORE