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Numerical Simulation of Swirling Flow in Complex Hydroturbine Draft Tube Using Unsteady Statistical Turbulence Models
Publisher: American Society of Civil Engineers
Abstract: A numerical method is developed for carrying out unsteady Reynolds-averaged Navier-Stokes (URANS) simulations and detached-eddy simulations (DESs) in complex 3D geometries. The method is applied to simulate incompressible ...
Three-Dimensional Unsteady RANS Modeling of Discontinuous Gravity Currents in Rectangular Domains
Publisher: American Society of Civil Engineers
Abstract: Discontinuous gravity currents in rectangular channels are modeled numerically by solving the 3D unsteady Reynolds-averaged Navier-Stokes (URANS) equations closed with a buoyancy corrected low-Reynolds number (LRN)
Coherent Structure Dynamics in Turbulent Flows Past In-Stream Structures: Some Insights Gained via Numerical Simulation
Publisher: American Society of Civil Engineers
Abstract: Large-scale coherent vortical structures in natural streams and rivers dominate flow and transport processes and impact the stability of stream banks, the diversity and abundance of organisms, and the quality of running ...
Detached Eddy Simulation of the Nonaerated Skimming Flow over a Stepped Spillway
Publisher: American Society of Civil Engineers
Abstract: The unsteady three-dimensional (3D), nonaerated, skimming flow over a stepped spillway is investigated by means of a detached eddy simulation (DES). Special emphasis is placed on the description of the instantaneous velocity ...
Three-Dimensional Numerical Modeling of Initial Mixing of Thermal Discharges at Real-Life Configurations
Publisher: American Society of Civil Engineers
Abstract: A three-dimensional Reynolds-averaged Navier–Stokes computational fluid dynamics (CFD) model is developed for simulating initial mixing in the near field of thermal discharges at real-life geometrical configurations. The ...