Khoshavaz, Solmaz2021-01-072021-01-072020-122020-122021-01-06http://hdl.handle.net/11693/54869Cataloged from PDF version of article.Thesis (M.S.): Bilkent University, Department of Mechanical Engineering, İhsan Doğramacı Bilkent University, 2020.Includes bibliographical references (leaves 77-79).DNS studies of turbulent flows have proved to be inefficient in terms of time and computational resources. On the other hand, Large-eddy simulation (LES) is an effective approach towards modeling turbulence. The current research applies an extension of the Spectral Vanishing Viscosity (SVV) method to finite differences. This straight-forward LES technique allows turbulence modeling without the need for filtering or upwinding. The result is a hybrid DNS/LES Solver. The solver is applied to the two-fluid problem of falling liquid film in the presence of turbulent gas. Numerical simulation of falling liquid films requires a mathematical representation of the multiphase flow. A Direct Numerical Simulation (DNS) solver implementing finite volumes is used to solve the Navier-Stokes equations for the liquid phase. The Front Tracking method is used to model the moving gas-liquid interface. Gravity-driven falling liquid films are commonplace in engineering applications. Perturbed falling films dramatically increase the heat/mass transport across the interface compared to flat films, which highlights the significance of studying interfacial flows. The present research aims to develop a numerical tool, which will be used to further investigate falling liquid film phenomena.xii, 83 leaves : illustrations , 30 cm.Englishinfo:eu-repo/semantics/openAccessTurbulenceLarge-eddy simulationSpectral vanishing viscosityTwofluid flowFalling liquid filmsThesisB130911