Least-mean-squares algorithm to determine submicrometer particle diameter, volume fraction, and size distribution width by elastic light scattering

2002 ◽  
Vol 41 (21) ◽  
pp. 4421 ◽  
Author(s):  
R. Patrick Earhart ◽  
Terry E. Parker
Keyword(s):  
Light Scattering ◽  
Size Distribution ◽  
Volume Fraction ◽  
Particle Diameter ◽  
Elastic Light Scattering ◽  
Distribution Width ◽  
Least Mean Squares ◽  
Least Mean Squares Algorithm

Modelling Flocculated Cell Suspensions using a Population Balance Approach: Applications to Microfiltration

2002 ◽  
Vol 752 ◽  
Author(s):  
S. Ranil Wickramasinghe ◽  
Binbing Han ◽  
Saengchai Akeprathumchai ◽  
Xianghong Qian
Keyword(s):  
Distribution Function ◽  
Size Distribution ◽  
Volume Fraction ◽  
Particle Diameter ◽  
Population Balance ◽  
Balance Model ◽  
Floc Size ◽  
Balance Approach ◽  
Fragment Distribution ◽  
Log Normal

ABSTRACTExperimental results for flocculation of yeast and CHO cells using cationic polyelectrolytes are presented. These results suggest the existence of a self-similar floc size distribution. The experimentally determined floc size distributions have been modelled using a population balance approach. For flocculated yeast suspensions, the variation of the floc volume fraction with dimensionless particle diameter is predicted by the population balance model assuming a binary fragment distribution function. However, for CHO cell flocs, the floc volume fraction is predicted using a log normal fragment distribution function. Since the efficiency of unit operations such as microfiltration may be improved by flocculation of the feed suspension characterization of the particle size distribution is of great importance.

scholarly journals Optimum Angles for Multi-Angle Elastic Light Scattering Experiments

2011 ◽  
Author(s):  
D. W. Burr ◽  
K. J. Daun ◽  
K. A. Thomson ◽  
G. J. Smallwood
Keyword(s):  
Inverse Problem ◽  
Light Scattering ◽  
Light Intensity ◽  
Size Distribution ◽  
Design Of Experiment ◽  
Scattered Light ◽  
Scattered Light Intensity ◽  
Elastic Light Scattering ◽  
Optimal Angle ◽  
Ill Posed

In multiangle elastic light scattering (MAELS) experiments, the morphology of aerosolized particles is inferred by shining collimated radiation through the aerosol and then measuring the scattered light intensity over a set of angles. In the case of soot-laden aerosols MAELS can be used to recover, among other things, the size distribution of soot aggregates. This involves solving an ill-posed set of equations, however. While previous work focused on regularizing the inverse problem using Bayesian priors, this paper presents a design-of-experiment methodology for identifying the set of measurement angles that minimizes its ill-posedness. The inverse problem produced by the optimal angle set requires less regularization and is less sensitive to noise, compared with two other measurement angle sets commonly used to carry out MAELS experiments.

Quasi-elastic light scattering determination of the size distribution of extruded vesicles

1993 ◽  
Vol 65 (1) ◽  
pp. 1-10 ◽  
Author(s):  
S. Kölchens ◽  
V. Ramaswami ◽  
J. Birgenheier ◽  
L. Nett ◽  
D.F. O'Brien
Keyword(s):  
Light Scattering ◽  
Size Distribution ◽  
Elastic Light Scattering

scholarly journals Development of optical diagnostic method for colloidal solutions based on elastic light scattering

2021 ◽  
Vol 2127 (1) ◽  
pp. 012059
Author(s):  
M V Sapronov ◽  
N M Skornyakova ◽  
S S Usmanova
Keyword(s):  
Distribution Function ◽  
Light Scattering ◽  
Aluminum Oxide ◽  
Size Distribution ◽  
Colloidal Particles ◽  
Size Distribution Function ◽  
Dispersed Phase ◽  
Colloidal Solutions ◽  
Elastic Light Scattering ◽  
Study Results

Abstract The work is devoted to colloidal solutions diagnostics by the optical method based on elastic light scattering by particles of the dispersed phase. The scheme of the developed optical electronic complex for recording the intensity of radiation scattered by colloidal particles is presented. The experimental study results of the elastic scattering of laser radiation on spherical nanometer-sized aluminum oxide particles suspended in water are represented. A method for measuring the scattering indicatrix based on the registration of radiation scattered in various directions and subsequent computer processing has been proposed. A method for reconstructing the particle size distribution function of colloidal solution dispersed phase by comparing the measured scattering indicators and their computer models has been developed. The method has been tested, as a result of which the size distribution function of aluminum oxide nanopowder particles has been restored.

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