Assessment of large eddy and RANS stirred tank simulations by means of LDA

Assessment of large eddy and RANS stirred tank simulations by means of LDA

Large eddy simulations (LES) and Reynolds-averaged Navier–Stokes (RANS) calculations were performed on the flow in a baffled stirred tank, driven by a Rushton turbine at Re=7300. The LES methodology provides detailed flow information as velocity fluctuations are resolved down to the scale of the num...

Full description

Saved in:
Bibliographic Details
Published in:Chemical engineering science Vol. 59; no. 12; pp. 2419 - 2432
Main Authors: Hartmann, H., Derksen, J.J., Montavon, C., Pearson, J., Hamill, I.S., van den Akker, H.E.A.
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-06-2004
Elsevier
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Fluid dynamics
LDA
Mixing
Simulations
Stirred tank
Turbulence
Stirred tank
LDA
Simulations
Mixing
Turbulence
Fluid dynamics
Transport process
Stirred vessel
Computational fluid dynamics
Navier Stokes equation
Doppler laser anemometer
Force field
Shear stress
Flow field
Modeling
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Large eddy simulations (LES) and Reynolds-averaged Navier–Stokes (RANS) calculations were performed on the flow in a baffled stirred tank, driven by a Rushton turbine at Re=7300. The LES methodology provides detailed flow information as velocity fluctuations are resolved down to the scale of the numerical grid. The Smagorinsky and Voke subgrid-scale models used in the LES were embedded in a numerical lattice-Boltzmann scheme for discretizing the Navier–Stokes equations, and an adaptive force-field technique was used for modeling the geometry. The uniform, cubic computational grid had a size of 240 3 grid nodes. The RANS calculations were performed using the computational fluid dynamics code CFX 5.5.1. A transient sliding mesh procedure was applied in combination with the shear-stress-transport (SST) turbulence closure model. The mesh used for the RANS calculation consisted of 241464 nodes and 228096 elements (hexahedrons). Phase-averaged and phase-resolved flow field data, as well as turbulence characteristics, based on the LES and RANS results, are compared both mutually and with a single set of experimental data.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2004.01.065