Simulations of confined turbulent vortex flow

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Large-eddy simulations (LES) of the turbulent flow in a swirl tube with a tangential inlet have been performed. The geometry, and flow conditions were chosen according to an experimental study by [Escudier MP, Bornstein J, Zehnder N. Observations and LDA measurements of confined turbulent vortex flow. J Fluid Mech 1980;98:49-63]. Lattice-Boltzmann discretization was used to numerically solve the Navier-Stokes equations in the incompressible limit. Effects of spatial resolution and choices in subgrid-scale modeling were explicitly investigated with the experimental data set as the testing ground. Experimentally observed flow features, such as vortex breakdown and laminarization of the vortex core were well represented by the LES. The simulations confirmed the experimental observations that the average velocity profiles in the entire vortex tube are extremely sensitivity to the exit pipe diameter. For the narrowest exit pipe considered in the simulations, very high average velocity gradients are encountered. In this situation, the LES shows the most pronounced effects of spatial resolution and subgrid-scale modeling. (C) 2004 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)301-318
Number of pages18
JournalComputers & Fluids
Volume34
Issue number3
DOIs
Publication statusPublished - Mar 2005

Keywords

  • LATTICE-BOLTZMANN SCHEME
  • LARGE-EDDY SIMULATIONS
  • EXTERNAL FORCE-FIELD
  • NUMERICAL-SIMULATION
  • FLUID-FLOW
  • BREAKDOWN
  • CYCLONE
  • PRECESSION
  • VORTICES
  • BOUNDARY

Cite this

Simulations of confined turbulent vortex flow. / Derksen, JJ.

In: Computers & Fluids, Vol. 34, No. 3, 03.2005, p. 301-318.

Research output: Contribution to journalArticle

@article{fb097e118fce45459e0fbd0aa2b18370,
title = "Simulations of confined turbulent vortex flow",
abstract = "Large-eddy simulations (LES) of the turbulent flow in a swirl tube with a tangential inlet have been performed. The geometry, and flow conditions were chosen according to an experimental study by [Escudier MP, Bornstein J, Zehnder N. Observations and LDA measurements of confined turbulent vortex flow. J Fluid Mech 1980;98:49-63]. Lattice-Boltzmann discretization was used to numerically solve the Navier-Stokes equations in the incompressible limit. Effects of spatial resolution and choices in subgrid-scale modeling were explicitly investigated with the experimental data set as the testing ground. Experimentally observed flow features, such as vortex breakdown and laminarization of the vortex core were well represented by the LES. The simulations confirmed the experimental observations that the average velocity profiles in the entire vortex tube are extremely sensitivity to the exit pipe diameter. For the narrowest exit pipe considered in the simulations, very high average velocity gradients are encountered. In this situation, the LES shows the most pronounced effects of spatial resolution and subgrid-scale modeling. (C) 2004 Elsevier Ltd. All rights reserved.",
keywords = "LATTICE-BOLTZMANN SCHEME, LARGE-EDDY SIMULATIONS, EXTERNAL FORCE-FIELD, NUMERICAL-SIMULATION, FLUID-FLOW, BREAKDOWN, CYCLONE, PRECESSION, VORTICES, BOUNDARY",
author = "JJ Derksen",
year = "2005",
month = "3",
doi = "10.1016/j.compfluid.2004.06.001",
language = "English",
volume = "34",
pages = "301--318",
journal = "Computers & Fluids",
issn = "0045-7930",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",
number = "3",

}

TY - JOUR

T1 - Simulations of confined turbulent vortex flow

AU - Derksen, JJ

PY - 2005/3

Y1 - 2005/3

N2 - Large-eddy simulations (LES) of the turbulent flow in a swirl tube with a tangential inlet have been performed. The geometry, and flow conditions were chosen according to an experimental study by [Escudier MP, Bornstein J, Zehnder N. Observations and LDA measurements of confined turbulent vortex flow. J Fluid Mech 1980;98:49-63]. Lattice-Boltzmann discretization was used to numerically solve the Navier-Stokes equations in the incompressible limit. Effects of spatial resolution and choices in subgrid-scale modeling were explicitly investigated with the experimental data set as the testing ground. Experimentally observed flow features, such as vortex breakdown and laminarization of the vortex core were well represented by the LES. The simulations confirmed the experimental observations that the average velocity profiles in the entire vortex tube are extremely sensitivity to the exit pipe diameter. For the narrowest exit pipe considered in the simulations, very high average velocity gradients are encountered. In this situation, the LES shows the most pronounced effects of spatial resolution and subgrid-scale modeling. (C) 2004 Elsevier Ltd. All rights reserved.

AB - Large-eddy simulations (LES) of the turbulent flow in a swirl tube with a tangential inlet have been performed. The geometry, and flow conditions were chosen according to an experimental study by [Escudier MP, Bornstein J, Zehnder N. Observations and LDA measurements of confined turbulent vortex flow. J Fluid Mech 1980;98:49-63]. Lattice-Boltzmann discretization was used to numerically solve the Navier-Stokes equations in the incompressible limit. Effects of spatial resolution and choices in subgrid-scale modeling were explicitly investigated with the experimental data set as the testing ground. Experimentally observed flow features, such as vortex breakdown and laminarization of the vortex core were well represented by the LES. The simulations confirmed the experimental observations that the average velocity profiles in the entire vortex tube are extremely sensitivity to the exit pipe diameter. For the narrowest exit pipe considered in the simulations, very high average velocity gradients are encountered. In this situation, the LES shows the most pronounced effects of spatial resolution and subgrid-scale modeling. (C) 2004 Elsevier Ltd. All rights reserved.

KW - LATTICE-BOLTZMANN SCHEME

KW - LARGE-EDDY SIMULATIONS

KW - EXTERNAL FORCE-FIELD

KW - NUMERICAL-SIMULATION

KW - FLUID-FLOW

KW - BREAKDOWN

KW - CYCLONE

KW - PRECESSION

KW - VORTICES

KW - BOUNDARY

U2 - 10.1016/j.compfluid.2004.06.001

DO - 10.1016/j.compfluid.2004.06.001

M3 - Article

VL - 34

SP - 301

EP - 318

JO - Computers & Fluids

JF - Computers & Fluids

SN - 0045-7930

IS - 3

ER -