Measurements using LDV of continuous phase velocities of solid-liquid flow at elevated concentrations in a stirred vessel
Journal article, 2007

Laser Doppler velocimetry was used to evaluate liquid axial velocities and turbulence levels in a stirred vessel equipped with a standard 45° pitch blade turbine. The measurements were conducted utilizing the method of matching refractive indices. Three different solid particle sizes were studied; 1.0 mm, 1.5 mm and 2.0 mm, and the maximum mean volume fractions for which measurements could be performed were 6%, 9% and 9%, respectively. The axial velocities were found to decrease with increasing solid content while the liquid r.m.s. velocities were higher in the suppensions than in a single phase flow, an effect that increases with increasing particle size.

Stirred vessel

Laser doppler velocimetry


Multiphase flow

Solids suspensions



Torbjörn Virdung

Chalmers, Chemical and Biological Engineering

Anders Rasmuson

Chalmers, Chemical and Biological Engineering

Chemical Engineering Research and Design

0263-8762 (ISSN) 1744-3563 (eISSN)

Vol. 85 A2 193-200

Subject Categories

Chemical Engineering



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