Measurements on Particle Size Distribution and Concentration by Transmission Fluctuation Spectrometry with Temporal Correlation

Abstract

Transmission fluctuation spectrometry with temporal correlation (TFS‐TC) is a new method for particle analysis. When a narrow light beam irradiates on a particle dispersion flow, the variation of the number of particles in the small measuring zone will cause the transmitted light to fluctuate, which includes the complete information on both particle size distribution (PSD) and particle concentration. The method may be used for real‐time, inline/online applications due to its simplicity of measuring principle and experimental setup. Until recently, the theory has been limited to low particle concentrations. In this work, an experimental study of the TFS‐TC measurement is presented for a very wide range of the particle concentrations. By introducing an empirical correction including the high concentration effects and considering the effect from rheological conditions in the inversion algorithm, the particle size distribution and particle concentration are reconstructed, resulting in the coverage of a broad range of particle size and concentration.

Calculation of Particle Size Distributions from Ultrasonic Measurements: A Mineral Slurry Case Study

“…A criterion must be adopted for terminating the iteration process. The options are: terminating the process after a fixed number of iterations or when the residual error falls below a set level or when the change in some calculated value is too small or a hybrid of two of these methods such as used in [9]. It was found in practice that all criteria gave very similar particle size distributions so the simplest, terminating after a fixed number of iterations, was used in this case study.…”