The minimum record time for PIV measurement in a vessel agitated by a Rushton turbine
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Date
2017
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Abstract
In PIV studies published in the literature focusing on the investigation of the flow field in an
agitated vessel the record time is ranging from the tenths and the units of seconds. The aim of this work was
to determine minimum record time for PIV measurement in a vessel agitated by a Rushton turbine that is
necessary to obtain relevant results of velocity field. The velocity fields were measured in a fully baffled
cylindrical flat bottom vessel 400 mm in inner diameter agitated by a Rushton turbine 133 mm in diameter
using 2-D Time Resolved Particle Image Velocimetry in the impeller Reynolds number range from 50 000
to 189 000. This Re range secures the fully-developed turbulent flow of agitated liquid. Three liquids of
different viscosities were used as the agitated liquid. On the basis of the analysis of the radial and axial
components of the mean- and fluctuation velocities measured outside the impeller region it was found that
dimensionless minimum record time is independent of impeller Reynolds number and is equalled N.tRmin =
103 ± 19.
Description
Subject(s)
piv measurement, agitated vessel, mixing process, ruschton turbine
Citation
ISSN
2100-014X