Effects of Vacuum Mixing, Water Addition, and Mixing Time on the Quality of Fresh Chinese White Noodles and the Optimization of the Mixing Process

2015 ◽  
Vol 92 (5) ◽  
pp. 427-433 ◽  
Author(s):  
Rui Liu ◽  
Yimin Wei ◽  
Xiaolong Ren ◽  
Yanan Xing ◽  
Yingquan Zhang ◽  
...  
Keyword(s):  
Mixing Time ◽  
Mixing Process ◽  
Water Addition ◽  
Chinese White ◽  
Vacuum Mixing ◽  
Mixing Water

scholarly journals Influence of the addition sequence of PVA-fibers and water on mixing and rheological behavior of mortars

2016 ◽  
Vol 9 (2) ◽  
pp. 226-243 ◽  
Author(s):  
M. S. de França ◽  
F. A. Cardoso ◽  
R. G. Pileggi
Keyword(s):  
Rheological Behavior ◽  
Mechanical Performance ◽  
Mixing Time ◽  
Mix Design ◽  
Mixing Process ◽  
Water Addition ◽  
Test Parameters ◽  
The Matrix ◽  
Mixing Sequences ◽  
The Moment

ABSTRACT The mixing process of fiber-containing cementitious suspensions is a crucial factor to obtaining a good dispersion of fibers and guarantee adequate mechanical performance of the hardened products. The addition of fibers into the suspension causes reduction of the fluidity of the system due to factors inherent to the fibers, the matrix and their interaction. During mixing, these interactions make dispersion and homogenization processes more difficult due to the formation of fibers - particles agglomerates. Conventional techniques to assess workability of mortars are inadequate to evaluate the rheological behavior of fiber-reinforced systems, in which parameters like viscosity and yield stress are not completely taken into account. Therefore, this work employs rotational rheometry to evaluate the influence of fiber and water addition sequences on mixing and rheological behavior of mortars containing Polyvinyl Alcohol (PVA) fibers. Constant test parameters were: mixing time of 317s; impeller velocity 126.5 rpm; water flow 128g/s. A constant mix design was used with a water content of 16%wt, and a 0.2%vol of fibers were added to the reference composition. Four mixing sequences were studied: S1 and S2 are based on the addition of fibers at different stages of the mixing process; while in S3 and S4 not only the fibers are added at different stages, but also the water addition is performed in two steps (25% first and 75% latter).Results showed that it is possible to optimize the mixing step of fiber-containing systems by changing the moment of fiber addition into the mixture. The introduction of fibers after mixing the dry mortar with water, when it already had achieved its fluidity point, demanded a lower mixing effort and produced a more flowable material.

Optimization of the Mixing Process and Quality Evaluation of the Thirteen-Component Granular Mixture

2014 ◽  
Vol 693 ◽  
pp. 261-266 ◽  
Author(s):  
Jolanta B. Krolczyk ◽  
Marek Tukiendorf ◽  
Rafał Dawid
Keyword(s):  
Quality Assessment ◽  
Quality Evaluation ◽  
Mixing Time ◽  
Sum Of Squares ◽  
Mixing Times ◽  
Mixing Process ◽  
Component Mixture ◽  
Granular Mixture ◽  
Research Results

The paper presents the research on the quality of thirteen-component granular mixture. The changes in the quality of the mixture after reduction the mixing time from a standard time of 30 minutes to: 25 minutes, 20 minutes and 15 minutes have been analyzed. The research has been conducted in industrial conditions where a vertical mixer with worm agitator with the charge of two tons was used. Research results were presented graphically as changes in concentration of components shares in the mixing time of 30, 25, 20 and 15 minutes and the obtained results were compared. Quality assessment of a thirteen-component mixture with the use of residual sum of squares for four mixing times was carried out.

scholarly journals Effect of Cylindrical Turbulators on the Mixing Process in Basic Venturi Gas Mixer Using OpenFOAM

2019 ◽  
Vol 252 ◽  
pp. 04004
Author(s):  
Mathias Romańczyk ◽  
Witold Elsner
Keyword(s):  
Mixing Time ◽  
Qualitative Evaluation ◽  
Fuel Mixture ◽  
Mixing Process ◽  
The European Union ◽  
Environmental Standards ◽  
Air Inlet ◽  
Venturi Pipe ◽  
The Impact

This study was devoted to improving the mixing quality in a Venturi gas mixer. It is well known that the performance of industrial gas engines strongly depends on the quality of air and fuel mixture and therefore on its homogeneity. Incorrect mixture proportions may lead to unstable operation of the entire industrial gas engine and excessive emissions exceeding environmental standards of the European Union. The effectiveness of the mixing process in a Venturi gas mixer depends on many factors, i.e. correct proportions between Air inlet, Venturi Throat diameter, as well as gas inlet area. To improve the intensification of the whole mixing process, as well as to increase the mixing time between gas and air, it was decided to insert disturbing elements in form of cylindrical turbulators into the Venturi pipe. Therefore numerical calculations were performed for the most commonly consumed by industrial gas engines lean Air-Fuel mixture, with an air excess coefficient ratio of λ = 1.6. In numerical analysis, OpenFOAM software was used to investigate the impact of cylindrical turbulators on the whole mixing process in a basic Venturi gas mixer. Particular attention was focused on the Air-Fuel Ratio (AFR) changes, Turbulent Kinetic Energy (TKE) and Pressure loss [Pa], which is one of the most qualitative evaluation parameters of a gas mixer.

scholarly journals Effect of the dough mixing process on the quality of wheat and buckwheat proteins

2017 ◽  
Vol 35 (No. 6) ◽  
pp. 522-531 ◽  
Author(s):  
Sluková Marcela ◽  
Levková Julie ◽  
Michalcová Alena ◽  
Horáčková Šárka ◽  
Skřivan Pavel
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Physical Properties ◽  
Mixing Time ◽  
Gluten Free ◽  
Mixing Process ◽  
Gluten Proteins ◽  
Buckwheat Flour ◽  
Scanning Electron

The changes in the structure of cereal proteins during the mixing of flour into dough was described and evaluated. Wheat gliadins and glutenins (gluten proteins) have unique physical properties and play an important role in breadmaking. The effect of mixing time on the formation and the structure of the gluten network was determined using scanning electron microscopy (SEM). Buckwheat flour (gluten-free) was used to compare the development of structure during the mixing process.

scholarly journals Continuous production of multicomponent powder mixtures

2020 ◽  
Vol 315 ◽  
pp. 04003
Author(s):  
Wasem Mansour ◽  
Denis Melekhin ◽  
Alexander Pasko
Keyword(s):  
Multicomponent Mixture ◽  
Mixing Time ◽  
Continuous Production ◽  
Mixing Process ◽  
Important Process ◽  
High Concentration ◽  
Powder Mixtures ◽  
Correct Sequence ◽  
Technological Methods

Mixing of powders is an important process in various industries, from chemical, pharmaceutical to food and construction. The main characteristic of the mixture is its homogeneity, which is usually estimated by the coefficient variation and the lower this ratio, the better the mixture. Typically, particles of the components of the mixture differ in size and / or density. These differences cause segregation, i.e. the formation of zones in which there is a high concentration of one of the components and this affects the quality of the mixture. However, through the use of special technological methods, the negative result of segregation can be transformed into a positive one and not only reduce the mixing time, but also improve the quality of the mixture. This article discusses one of the options for the production of a multicomponent mixture with a specific schedule for loading components. It is shown that by organizing the correct sequence of loading components, you can control the mixing process. Two-step technology is used to feed components into the mixer.

Effects of vacuum mixing and mixing time on the processing quality of noodle dough with high oat flour content

2020 ◽  
Vol 91 ◽  
pp. 102885 ◽  
Author(s):  
Shuyi Liu ◽  
Yilin Sun ◽  
Mohammed Obadi ◽  
Yiyi Jiang ◽  
Zhongwei Chen ◽  
...  
Keyword(s):  
Mixing Time ◽  
Processing Quality ◽  
Oat Flour ◽  
Vacuum Mixing

scholarly journals The use of mathematical modelling to analyse the process of mixing waters from different sources in water supply system

2018 ◽  
Vol 59 ◽  
pp. 00025
Author(s):  
Agnieszka Szuster – Janiaczyk ◽  
Rafał Brodziak ◽  
Jędrzej Bylka
Keyword(s):  
Mathematical Modeling ◽  
Water Quality ◽  
Quality Criteria ◽  
Supply System ◽  
Network Control ◽  
Quality Of Water ◽  
Water Mains ◽  
Different Sources ◽  
Mixing Water

One of the processes that significantly determines the quality of water to consumers is the process of mixing water from different sources in the water mains. Put to the network two or more chemically and biologically stable waters may result in the formation of water that will be deprived of these features. This article presents the german guidelines for analysing water quality for mixing waters from different sources, in various proportions. Then performed an analysis of utility the mathematical models,including quality criteria, for use in network control. An IT tool has been developed to manage selected water quality processes using mathematical modeling. The basis for implementing the tool was a network model created in Epanet integrated with the Matlab.

Development of Mixture "Clay – Electro-Smelting Slag" for Ceramic Brick

2014 ◽  
Vol 682 ◽  
pp. 480-484 ◽  
Author(s):  
V.F. Torosyan ◽  
E.S. Torosyan
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Ceramic Brick ◽  
Ceramic Samples ◽  
Manufactured Products ◽  
Smelting Slag ◽  
Compression Resistance ◽  
Mixing Water ◽  
Melting Slag

Industrial transition to a totally new level of resources and energy saving necessitates improving the technical level of building materials manufacturing, growing their raw materials base, the assortment, enhancing the quality of manufactured products, cutting their cost price. It requires, first of all, carrying out more detailed research in properties of clay and clay loams, and selecting optimal additives for pottery works. Such disadvantages of clays as burning sensitivity, low compression resistance and flexural strength in a burnt state, low frost resistance cause the impossibility of their application without corrective additives. It is quite difficult to find an additive which can solve all the technological problems mentioned above. This paper provides the development of mixture "clay – electro-melting slag" for ceramic brick, moreover, addition of a steel-smelting slag in the fusion mixture results in the change in mixing water content of ceramic masses, strength and coloration of ceramic samples.

scholarly journals Hydrodynamics and Mass Transfer Analysis in BioFlow® Bioreactor Systems

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1311 ◽  
Author(s):  
Marian Kordas ◽  
Maciej Konopacki ◽  
Bartłomiej Grygorcewicz ◽  
Adrian Augustyniak ◽  
Daniel Musik ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Mixing Time ◽  
Mass Transfer Rate ◽  
Mass Transfer Process ◽  
Mixing Process ◽  
Stirred Tanks ◽  
Mixing Energy ◽  
Biotechnological Processes ◽  
Liquid Transfer ◽  
Mathematical Relationships

Biotechnological processes involving the presence of microorganisms are realized by using various types of stirred tanks or laboratory-scale dual-impeller commercial bioreactor. Hydrodynamics and mass transfer rate are crucial parameters describing the functionality and efficiency of bioreactors. Both parameters strictly depend on mixing applied during bioprocesses conducted in bioreactors. Establishing optimum hydrodynamics conditions for the realized process with microorganisms maximizes the yield of desired products. Therefore, our main objective was to analyze and define the main operational hydrodynamic parameters (including flow field, power consumption, mixing time, and mixing energy) and mass transfer process (in this case, gas–liquid transfer) of two different commercial bioreactors (BioFlo® 115 and BioFlo® 415). The obtained results are allowed using mathematical relationships to describe the analyzed processes that can be used to predict the mixing process and mass transfer ratio in BioFlo® bioreactors. The proposed correlations may be applied for the design of a scaled-up or scaled-down bioreactors.

Effect of Mixing Process on the Fracture Behavior of HA/PLLA Composite Material

2005 ◽  
Vol 297-300 ◽  
pp. 2453-2458 ◽  
Author(s):  
Sang Dae Park ◽  
Mitsugu Todo ◽  
Kazuo Arakawa ◽  
Yasuharu Takenoshita
Keyword(s):  
Fracture Toughness ◽  
Fracture Behavior ◽  
Mixing Time ◽  
Time Effect ◽  
Ductile Deformation ◽  
Fracture Surface Morphology ◽  
Mixing Process ◽  
Rotor Speed ◽  
Neat Plla ◽  
Scanning Electron

Effect of mixing process on the fracture behavior of HA/PLLA Composites were investigated. Fracture toughness values of HA/PLLA composites prepared under different mixing time and rotor speed were measured. The fracture surface morphology was also examined by scanning electron microscopy. It was found that the fracture toughness of HA/PLLA composite decreases due to decrease of ductile deformation of PLLA matrix and debonding of interfaces with increase of the rotor speed and mixing time. Effect of mixing process on neat PLLA was also assessed, and it was found that the fracture toughness of PLLA decreases due to such pocess. Disappearance of multiple craze formation and thermal degradation were found to be the primary mechanisms of the toughness degradation.

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