Assay Variance in a Granular Formulation Can Predict Mixture Homogeneity

2008 ◽  
pp. 59-59-9
Author(s):  
GR Goss ◽  
C Hendrix ◽  
HM Baldwin
Keyword(s):  
Mixture Homogeneity

scholarly journals Mixedness Measurement in Gaseous Jet Injection

2017 ◽  
Author(s):  
Martia Shahsavan ◽  
John Hunter Mack
Keyword(s):  
Combustion Chamber ◽  
Direct Injection ◽  
Premixed Combustion ◽  
Working Fluid ◽  
Scalar Dissipation ◽  
Jet Injection ◽  
Direct Injection Engines ◽  
Comprehensive Method ◽  
Mixture Homogeneity ◽  
Crucial Parameter

In turbulent non-premixed combustion applications, such as diesel and direct injection engines, the mixedness of the injected fuel with oxygen and the working fluid inside the combustion chamber is a crucial parameter since it can significantly affect the ignition behavior. In this study, a comprehensive method for investigating mixedness, defined by spatial variation and scalar dissipation, is implemented to assess the turbulent injection of hydrogen into mixture of oxygen with nitrogen, argon, and xenon. Evaluating both criteria reflects the mixture homogeneity as well as local gradients, which aids in discriminating scalar distributions with identical homogeneity and different patterns. The results indicate that replacing nitrogen with argon as the working fluid can provide more suitable ignition conditions for the hydrogen jet.

Measurement of Solid-Liquid Mixtures Using Electrical Tomography Measurement Techniques

2009 ◽  
Author(s):  
Gary Bolton ◽  
Stephen Stanley
Keyword(s):  
High Speed ◽  
Measurement Techniques ◽  
Electrode Array ◽  
Liquid Mixtures ◽  
Industrial Plant ◽  
Electrical Tomography ◽  
Impedance Tomography ◽  
Electrical Imaging ◽  
Solid Liquid ◽  
Mixture Homogeneity

Electrical Impedance Tomography measurement techniques have been applied to a variety of solid-liquid processes in the laboratory and on industrial plant. This paper reviews the advances in the measurement techniques to determine key process information in solid-liquid systems such as concentration mapping, mixture homogeneity, interface detection and suspension velocity. A number of applications to solid-liquid flow applications are presented. The use of the technology for improved design and operation is highlighted, as are the opportunities for on-line sensing for flow measurement, fault detection and process control. A recent development in high-speed electrical imaging has allowed velocity maps to be calculated for fast flowing suspensions (up to 10 ms−1). The methodology for determining mixture homogeneity in both pipeline flows and agitated tanks are summarized. Finally the application of a linear ERT electrode array to identify interfaces during the settling of solid-liquid mixtures is presented.

Effects of Mixture Homogeneity to DISI Engines on Knock Characteristics

2005 ◽  
Author(s):  
Hiroshi Yoshimura ◽  
Akio Yoshimatsu ◽  
Kazuyoshi Abe ◽  
Sigemitsu Iisaka
Keyword(s):  
Mixture Homogeneity

Application of Statistical Methods in Evaluating Asphalt Mixture Homogeneity

2011 ◽  
Vol 39 (3) ◽  
pp. 102795
Author(s):  
M. R. Mitchell ◽  
R. E. Link ◽  
Y. Peng ◽  
L. J. Sun
Keyword(s):  
Statistical Methods ◽  
Asphalt Mixture ◽  
Mixture Homogeneity

scholarly journals EVALUATION OF GRADATION VARIATION OF THE GRANITE AGGREGATES USED IN ASPHALT MIXTURES AT THEIR MANUFACTURING PLACE

2020 ◽  
Author(s):  
Mantas Makulavičius ◽  
Henrikas Sivilevičius
Keyword(s):  
Standard Deviation ◽  
Asphalt Mixture ◽  
Quality Parameters ◽  
Key Factors ◽  
Manufacturing Plants ◽  
Road Pavement ◽  
Research Findings ◽  
The Mean ◽  
Mixture Homogeneity

Asphalt mixture gradation homogeneity is one of the key factors for proper laying and compaction during road pavement and its long-term maintenance afterwards. To achieve the good quality asphalt mixture homogeneity of aggregates used in road pavement must be kept in mind. Regarding to this, gradation variation of five different granite aggregates fractions (0/2, 2/5, 5/8, 8/11 and 11/16) from one of the largest manufacturing plants in Lithuania were determined in this paper. Total of 244 samples were taken from conveyer belt at the manufacturing place and all the data was evaluated by statistical methods providing histograms with theoretical curves of normal distribution. After that, the results were compared to each other and the requirements issued by Lithuanian road administration authority. Regression analysis was used to determine the dependence of standard deviation of percent passing and the mean percent passing through the sieves. The obtained research findings revealed that the maximum value of standard deviation of this dependence was equal to mean of 50% percent passing. Further investigations should include other aggregates quality parameters variation and its homogeneity throughout different stages of technological and transportation processes.

scholarly journals Influence of stirrer type on mixture homogeneity in continuous powder mixing: A model case and a pharmaceutical case

2008 ◽  
Vol 86 (9) ◽  
pp. 1027-1037 ◽  
Author(s):  
K. Marikh ◽  
H. Berthiaux ◽  
C. Gatumel ◽  
V. Mizonov ◽  
E. Barantseva
Keyword(s):  
Powder Mixing ◽  
Model Case ◽  
Continuous Powder Mixing ◽  
Mixture Homogeneity

Characterization of the hierarchical structures of a dry nanopowder in a polymer matrix by X-ray scattering techniques

2009 ◽  
Vol 42 (5) ◽  
pp. 925-931 ◽  
Author(s):  
Marie C. Kane ◽  
J. David Londono ◽  
Frederick L. Beyer ◽  
Anthony B. Brennan
Keyword(s):  
Small Angle ◽  
Measurement Techniques ◽  
Particle Surface ◽  
Average Particle ◽  
Length Scale ◽  
X Ray ◽  
Particle Mixture ◽  
X Ray Scattering ◽  
Mixture Homogeneity ◽  
Ray Scattering

There are many material properties benefits that can be realized by adding nano-sized filler particles to a polymeric resin, such as improvements in strength, modulus and optical transparency. However, the relative amount of improvement is highly dependent on the degree of particle dispersion or homogeneity within the nanocomposite. In this study, a commercially available dry titania nanopowder with a mean primary particle diameter of approximately 30 nm was mixed into an epoxy resin/hardener system to produce nanocomposite samples. Processing techniques such as ultrasonication and particle surface modification were used to produce nanocomposites with varying degrees of particle mixture homogeneity. The extent of nanoparticle dispersion was characterized by a combination of small-angle X-ray scattering and ultra-small-angle X-ray scattering. The measurement length scale ranged between 1 nm and several micrometres. Both measurement techniques provided information on the size distribution of primary particles, aggregates or particle agglomerates in the polymer nanocomposites, depending on the length scale (qregion) of interest. Using this combination of processing and characterization techniques, a decrease in average particle cluster size of two orders of magnitude was observed between samples of varying particle mixture homogeneity.

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