Publication

Flow Simulation in an Elbow Diffuser : Verification and Validation

François Avellan, Sebastiano Mauri
2002
Conference Papers

Abstract

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 most practically relevant turbulent flows continues to be based on this equation system. For this reason it is important to evaluate the limitations of this approach. Verification and validation are presented; detailed measurements are compared with computations over a wide range of operating conditions.

Official source

https://infoscience.epfl.ch/entities/publication/1cea0252-8e9e-4006-b5cb-cfab838748ef

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François Avellan, Sebastiano Mauri
2002
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1cea0252-8e9e-4006-b5cb-cfab838748ef

About this result

Related concepts (21)

Fluid dynamics

In physics, physical chemistry and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids—liquids and gases. It has several subdisciplines, including aerodynamics (the study of air and other gases in motion) and hydrodynamics (the study of liquids in motion). Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns, understanding nebulae in interstellar space and modelling fission weapon detonation.

Simulation

A simulation is the imitation of the operation of a real-world process or system over time. Simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process, whereas the simulation represents the evolution of the model over time. Often, computers are used to execute the simulation. Simulation is used in many contexts, such as simulation of technology for performance tuning or optimizing, safety engineering, testing, training, education, and video games.

Turbulence

In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between those layers. Turbulence is commonly observed in everyday phenomena such as surf, fast flowing rivers, billowing storm clouds, or smoke from a chimney, and most fluid flows occurring in nature or created in engineering applications are turbulent.

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