Publication

A class of explicit ENO filters with application to unsteady flows

Michel Deville
2001
Journal Articles

Abstract

ENO filters are developed and compared with classical ENO schemes, TVD filters, and classical TVD schemes. The amplitude of the numerical dissipation provided by the filtering pass is computed by means of the artificial compression method (ACM) switch and it is demonstrated that the use of this sensor improves markedly the quality of results compared to classical approaches (shock-capturing schemes) in laminar unsteady flows. On a fully turbulent flow, it is demonstrated that the ACM sensor is not able to distinguish a turbulent fluctuation from a shock, whereas the sensor proposed by Ducros ef al. [9] makes easily this distinction. (C) 2001 Academic Press.

Official source

https://infoscience.epfl.ch/entities/publication/f0b18c4e-9ef1-429f-981a-977588baff28

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Michel Deville
2001
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f0b18c4e-9ef1-429f-981a-977588baff28

About this result

Related concepts (32)

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.

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.

Stokes flow

Stokes flow (named after George Gabriel Stokes), also named creeping flow or creeping motion, is a type of fluid flow where advective inertial forces are small compared with viscous forces. The Reynolds number is low, i.e. . This is a typical situation in flows where the fluid velocities are very slow, the viscosities are very large, or the length-scales of the flow are very small. Creeping flow was first studied to understand lubrication. In nature, this type of flow occurs in the swimming of microorganisms and sperm.

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A class of explicit ENO filters with application to unsteady flows

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