Particle image velocimetry measurements in an aerated stirred tank
N.G. Deen, Bjorn H. Hjertager
In state-of-the-art research of multiphase flows, numerical simulations are performed time-dependently and in three dimensions. For the validation of such simulations the availability of quantitative measurement data is crucial. In this study angle resolved and angle-averaged flowfields of the liquid in the vicinity of a Rushton impeller in a stirred tank were measured with the use of particle image velocimetry (PIV). Single-phase liquid flowfields were compared with flowfields of the liquid in an aerated stirred tank. The characteristic trailing vortices in the single-phase flow were observed. When the tank was aerated, the trailing vortices disappeared. Furthermore, the flowfield turned out to be less periodic than without gas. The measured liquid velocities in the impeller-swept region were 50% lower in the case where gas was present. The absolute liquid velocity fluctuations in the presence of gas were of the same order of magnitude as in the case without gas, but when scaled with the maximum radial velocity the relative velocity fluctuations were significantly larger than in the single-phase flow.
Chemical engineering communications
https://doi.org/10.1080/00986440213881
Aerated stirred tanks
Gas-liquid flow
Rushton impeller
10.1080/00986440213881
Deen, N. G., & Hjertager, B. H. (2002). Particle image velocimetry measurements in an aerated stirred tank. Chemical engineering communications, 189(9), 1208-1221. https://doi.org/10.1080/00986440213881
Deen, N.G. ; Hjertager, Bjorn H. / Particle image velocimetry measurements in an aerated stirred tank. In: Chemical engineering communications. 2002 ; Vol. 189, No. 9. pp. 1208-1221.
@article{006727251459424cb7cf1d50654a96a4,
title = "Particle image velocimetry measurements in an aerated stirred tank",
abstract = "In state-of-the-art research of multiphase flows, numerical simulations are performed time-dependently and in three dimensions. For the validation of such simulations the availability of quantitative measurement data is crucial. In this study angle resolved and angle-averaged flowfields of the liquid in the vicinity of a Rushton impeller in a stirred tank were measured with the use of particle image velocimetry (PIV). Single-phase liquid flowfields were compared with flowfields of the liquid in an aerated stirred tank. The characteristic trailing vortices in the single-phase flow were observed. When the tank was aerated, the trailing vortices disappeared. Furthermore, the flowfield turned out to be less periodic than without gas. The measured liquid velocities in the impeller-swept region were 50% lower in the case where gas was present. The absolute liquid velocity fluctuations in the presence of gas were of the same order of magnitude as in the case without gas, but when scaled with the maximum radial velocity the relative velocity fluctuations were significantly larger than in the single-phase flow.",
keywords = "IR-69450, Aerated stirred tanks, Gas-liquid flow, Rushton impeller, Particle Image Velocimetry, METIS-210158",
author = "N.G. Deen and Hjertager, {Bjorn H.}",
doi = "10.1080/00986440213881",
journal = "Chemical engineering communications",
Deen, NG & Hjertager, BH 2002, 'Particle image velocimetry measurements in an aerated stirred tank', Chemical engineering communications, vol. 189, no. 9, pp. 1208-1221. https://doi.org/10.1080/00986440213881
Particle image velocimetry measurements in an aerated stirred tank. / Deen, N.G.; Hjertager, Bjorn H.
In: Chemical engineering communications, Vol. 189, No. 9, 2002, p. 1208-1221.
T1 - Particle image velocimetry measurements in an aerated stirred tank
AU - Deen, N.G.
AU - Hjertager, Bjorn H.
N2 - In state-of-the-art research of multiphase flows, numerical simulations are performed time-dependently and in three dimensions. For the validation of such simulations the availability of quantitative measurement data is crucial. In this study angle resolved and angle-averaged flowfields of the liquid in the vicinity of a Rushton impeller in a stirred tank were measured with the use of particle image velocimetry (PIV). Single-phase liquid flowfields were compared with flowfields of the liquid in an aerated stirred tank. The characteristic trailing vortices in the single-phase flow were observed. When the tank was aerated, the trailing vortices disappeared. Furthermore, the flowfield turned out to be less periodic than without gas. The measured liquid velocities in the impeller-swept region were 50% lower in the case where gas was present. The absolute liquid velocity fluctuations in the presence of gas were of the same order of magnitude as in the case without gas, but when scaled with the maximum radial velocity the relative velocity fluctuations were significantly larger than in the single-phase flow.
AB - In state-of-the-art research of multiphase flows, numerical simulations are performed time-dependently and in three dimensions. For the validation of such simulations the availability of quantitative measurement data is crucial. In this study angle resolved and angle-averaged flowfields of the liquid in the vicinity of a Rushton impeller in a stirred tank were measured with the use of particle image velocimetry (PIV). Single-phase liquid flowfields were compared with flowfields of the liquid in an aerated stirred tank. The characteristic trailing vortices in the single-phase flow were observed. When the tank was aerated, the trailing vortices disappeared. Furthermore, the flowfield turned out to be less periodic than without gas. The measured liquid velocities in the impeller-swept region were 50% lower in the case where gas was present. The absolute liquid velocity fluctuations in the presence of gas were of the same order of magnitude as in the case without gas, but when scaled with the maximum radial velocity the relative velocity fluctuations were significantly larger than in the single-phase flow.
KW - Aerated stirred tanks
KW - Gas-liquid flow
KW - Rushton impeller
U2 - 10.1080/00986440213881
DO - 10.1080/00986440213881
JO - Chemical engineering communications
JF - Chemical engineering communications
Deen NG, Hjertager BH. Particle image velocimetry measurements in an aerated stirred tank. Chemical engineering communications. 2002;189(9):1208-1221. https://doi.org/10.1080/00986440213881