ScholarLens Back to search
2006•Engineering MechanicsRequires access

ON SUB-GRID SCALE TURBULENCE CHARACTERISTICS

Xilin Wang

Open publisher page 2 citations

Abstract

A backward-facing step turbulent flow is numerically studied by means of large eddy simulation(LES).The flow Reynolds number was 18,400 based on step height and mean inlet velocity.The flow field structure and spatial distribution of SGS turbulent kinetic energy and SGS dissipation are given and their characteristics are discussed.SGS turbulent viscosity predicted by LES is compared with the equivalent turbulent viscosity calculated by turbulent model.SGS turbulent kinetic energy and SGS turbulent dissipation decrease with the flow developing spatially and both are weaker in the recirculation region than in other flow regions.The flow has maximum SGS turbulent kinetic energy and SGS turbulent dissipation at the profile of y/H=1.SGS turbulent kinetic energy is lower than fluctuation kinetic energy.SGS turbulent viscosity is lower than equivalent viscosity.

About this research paper

What this paper is about

A backward-facing step turbulent flow is numerically studied by means of large eddy simulation(LES).The flow Reynolds number was 18,400 based on step height and mean inlet velocity.The flow field structure and spatial distribution of SGS turbulent kinetic energy and SGS dissipation are given and their characteristics are discussed.SGS turbulent viscosity predicted by LES is compared with the equivalent turbulent viscosity calculated by turbulent model.SGS turbulent kinetic energy and SGS turbulent dissipation decrease with the flow developing spatially and both are weaker in the recirculation region than in other flow regions.The flow has maximum SGS turbulent kinetic energy and SGS turbulent dissipation at the profile of y/H=1.SGS turbulent kinetic energy is lower than fluctuation kinetic energy.SGS turbulent viscosity is lower than equivalent viscosity.

Why it matters

OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

A backward-facing step turbulent flow is numerically studied by means of large eddy simulation(LES).The flow Reynolds number was 18,400 based on step height and mean inlet velocity.The flow field structure and spatial distribution of SGS turbulent kinetic energy and SGS dissipation are given and their characteristics are discussed.SGS turbulent viscosity predicted by LES is compared with the equivalent turbulent viscosity calculated by turbulent model.SGS turbulent kinetic energy and SGS turbulent dissipation decrease with the flow developing spatially and both are weaker in the recirculation region than in other flow regions.The flow has maximum SGS turbulent kinetic energy and SGS turbulent dissipation at the profile of y/H=1.SGS turbulent kinetic energy is lower than fluctuation kinetic energy.SGS turbulent viscosity is lower than equivalent viscosity.

Key concepts: Turbulence, Turbulence kinetic energy, Mechanics, Kolmogorov microscales, Turbulence modeling, Dissipation, Kinetic energy, Chézy formula

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
ON SUB-GRID SCALE TURBULENCE CHARACTERISTICS — Research Paper | ScholarLens