Laser Doppler velocimetry measurements of particle velocity profiles in gas-solid two-phase flows

Measurement of mass flow rate of particulate solids in gravity chute conveyor based on laser sensing array

“…Sensing techniques for particulate solids concentration measurement are classified into four main categories according to the sensing principles, including electrical, attenuation, nuclear magnetic resonance and tomograph methods [5][6][7][8][9][10][11]. Measurements of particles' velocity can be realized by using Doppler, cross correlation or spatial filtering methods [12,13]. iron-making production.…”

Velocity characterization of dense phase pneumatically conveyed solid particles in horizontal pipeline through an integrated electrostatic sensor

“…Although the mean diameter of petroleum coke particle is slightly larger than that of the anthracite particle, petroleum coke particle is much easier to be suspended in the flow, meaning that the petroleum coke particle requires lower velocity or density (pressure) of carrying gas to reach the state of suspension. For the dilute suspension flow, the particle velocity profile approximately follows the power law distribution (Woodhead et al, 1995). And for the suspension flow in the experiment, the particle velocity profile may deviate from the power law distribution due to the uneven concentration distribution caused by the gravity, which is called degenerated homogeneous flow by Yan et al (1995b).…”

Review of techniques for the mass flow rate measurement of pneumatically conveyed solids

“…Laser Doppler velocimetry (LDV). Woodhead et al [30] detailed measurements of solids' velocity profiles in gas-solid two-phase flows by using a laser Doppler velocimetry system which consisted of a laser, forward and back scatter photomultipliers. Solids' velocity measurements were carried out for a range of average air velocities between 25 and 45 m/s, and for a range of suspension densities from 0.001 kg to 0.1 kg of solids per cubic meter of air.…”