Search for dissertations about: "subgrid scale models"
Showing result 1 - 5 of 18 swedish dissertations containing the words subgrid scale models.
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1. Large Eddy Simulation of Turbulent Flows in Combustor Related Geometries
Abstract : Numerical simulations using Large Eddy Simulation (LES) are applied to turbulent swirling flow fields. The swirling motion is often introduced into combustors to act as flame holders or enhance the mixing between species. Different turbulence models capture the swirling motion more or less accurately. READ MORE
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2. Subgrid-scale modelling for large-eddy simulation including scalar mixing in rotating turbulent shear flows
Abstract : The aim of the present study is to develop subgrid-scale models that are relevant for complex flows and combustion. A stochastic model based on a stochastic Smagorinsky constant with adjustable variance and time scale is proposed. READ MORE
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3. Modelling of subgrid-scale stress and passive scalar flux in large eddy simulations of wall bounded turbulent flows
Abstract : The aim of the thesis is to develop and validate subgrid-scale models that are relevant for large eddy simulations of complex flows including scalar mixing. A stochastic Smagorinsky model with adjustable variance and time scale is developed by adding a stochastic component to the Smagorinsky constant. READ MORE
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4. Explicit algebraic subgrid-scale stress and passive scalar flux modeling in large eddy simulation
Abstract : The present thesis deals with a number of challenges in the field of large eddy simulation (LES). These include the performance of subgrid-scale (SGS) models at fairly high Reynolds numbers and coarse resolutions, passive scalar and stochastic modeling in LES. READ MORE
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5. Large Eddy Simulations of Separated Compressible Flows around Wing Sections
Abstract : This thesis concerns numerical calculations of compressible separated flows, with and without shocks, around wing sections using Large Eddy Simulations (LES). The considered geometries are the NACA 0012 wing section and the ONERA AT15A wing section. READ MORE