scholarly journals Aspect Ratio Distribution and Chord Length Distribution Driven Modeling of Crystallization of Two-Dimensional Crystals for Real-Time Model-Based Applications

2018 ◽  
Vol 18 (9) ◽  
pp. 5311-5321 ◽  
Author(s):  
Botond Szilágyi ◽  
Zoltán K. Nagy
Keyword(s):  
Aspect Ratio ◽  
Real Time ◽  
Length Distribution ◽  
Chord Length ◽  
Two Dimensional ◽  
Time Model ◽  
Ratio Distribution ◽  
Model Based ◽  
Chord Length Distribution ◽  
Aspect Ratio Distribution

scholarly journals Estimation of particle size distribution and aspect ratio of non-spherical particles from chord length distribution

2015 ◽  
Vol 123 ◽  
pp. 629-640 ◽  
Author(s):  
Okpeafoh S. Agimelen ◽  
Peter Hamilton ◽  
Ian Haley ◽  
Alison Nordon ◽  
Massimiliano Vasile ◽  
...  
Keyword(s):  
Particle Size ◽  
Aspect Ratio ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Length Distribution ◽  
Chord Length ◽  
Spherical Particles ◽  
Chord Length Distribution

Real-Time Model-Based Fault Detection and Diagnosis for Alternators and Induction Motors

2007 ◽  
Author(s):  
Daniel F. Leite ◽  
Michel B. Hell ◽  
Patricia H. Diez ◽  
Bernardo S. L. Gariglio ◽  
Lucas O. Nascimento ◽  
...  
Keyword(s):  
Fault Detection ◽  
Real Time ◽  
Induction Motors ◽  
Fault Detection And Diagnosis ◽  
Time Model ◽  
Model Based ◽  
Detection And Diagnosis

scholarly journals Effect of Pre-Shear on Agglomeration and Rheological Parameters of Cement Paste

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2173
Author(s):  
Mareike Thiedeitz ◽  
Inka Dressler ◽  
Thomas Kränkel ◽  
Christoph Gehlen ◽  
Dirk Lowke
Keyword(s):  
Yield Stress ◽  
Mixing Time ◽  
Length Distribution ◽  
Chord Length ◽  
Rheological Parameters ◽  
Reflectance Measurement ◽  
Time Dynamic ◽  
Chord Length Distribution ◽  
In Situ Investigation

Cementitious pastes are multiphase suspensions that are rheologically characterized by viscosity and yield stress. They tend to flocculate during rest due to attractive interparticle forces, and desagglomerate when shear is induced. The shear history, e.g., mixing energy and time, determines the apparent state of flocculation and accordingly the particle size distribution of the cement in the suspension, which itself affects suspension’s plastic viscosity and yield stress. Thus, it is crucial to understand the effect of the mixing procedure of cementitious suspensions before starting rheological measurements. However, the measurement of the in-situ particle agglomeration status is difficult, due to rapidly changing particle network structuration. The focused beam reflectance measurement (FBRM) technique offers an opportunity for the in-situ investigation of the chord length distribution. This enables to detect the state of flocculation of the particles during shear. Cementitious pastes differing in their solid fraction and superplasticizer content were analyzed after various pre-shear histories, i.e., mixing times. Yield stress and viscosity were measured in a parallel-plate-rheometer and related to in-situ measurements of the chord length distribution with the FBRM-probe to characterize the agglomeration status. With increasing mixing time agglomerates were increasingly broken up in dependence of pre-shear: After 300 s of pre-shear the agglomerate sizes decreased by 10 µm to 15 µm compared to a 30 s pre-shear. At the same time dynamic yield stress and viscosity decreased up to 30% until a state of equilibrium was almost reached. The investigations show a correlation between mean chord length and the corresponding rheological parameters affected by the duration of pre-shear.

Sign in / Sign up

Export Citation Format

Share Document