Turbulence modeling for Francis turbine water passages simulation
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The subject of this thesis is the numerical simulation of viscous free-surface flows in naval engineering applications. State-of-the-art numerical methods based on the solution of the Navier-Stokes equations are used to predict the flow around different cl ...
Numerical simulation of the unsteady turbulent flow in a three-dimensional draft tube geometry is performed. The investigation is carried out with a commercial finite volume solver implementing the Reynolds averaged Navier-Stokes equations. The modeling of ...
International Association For Hydraulic Research2002
Large Eddy Simulations of three-dimensional turbulent compressible flows in curved duct of rectangular cross-section are presented. Strong secondary flows and turbulent structures are the typical features of this type of flow: these are responsible for mos ...
The investigation of flows in non-circular ducts of various sectional shape is of considerable engineering interest. In this paper, we perform simulations of the turbulent compressible flow in a duct of square cross section with streamwise curvature. The a ...
A new tuning-free subgrid-scale model, termed locally averaged scale-dependent dynamic ( LASDD) model, is developed and implemented in large-eddy simulations ( LES) of stable boundary layers. The new model dynamically computes the Smagorinsky coefficient a ...
This paper presents a review of the mathematical models which can be adopted to describe the different physical phenomena characterizing the flow around a sailing yacht. The complete model accounting for laminar-turbulent transition regime, free-surface dy ...
Large eddy simulations of three-dimensional turbulent compressible flows in curved duct of rectangular crosssection are presented. Strong secondary flows and turbulent structures are the typical features of this type of flow : these are responsible for mos ...
In this paper we review some classical algorithms for fluid-structure interaction problems and we propose an alternative viewpoint mutuated from the domain decomposition theory. This approach yields preconditioned Richardson iterations on the Steklov-Poinc ...
Mixing liquids at the micro-scale is difficult because the low Reynolds numbers in microchannels and in microreactors prohibit the use of conventional mixing techniques based on mechanical actuators and induce turbulence. Static mixers can be used to solve ...
Numerical simulation of the unsteady turbulent flow in a three-dimensional elbow diffuser is performed. The investigation is carried out with a commercial finite volume solver implementing the Reynolds averaged Navier-Stokes equations. Against the backgrou ...