scholarly journals A Review on the Some Issues of Multiphase Flow with Self-Driven Particles

2021 ◽  
Vol 11 (16) ◽  
pp. 7361
Author(s):  
Chen Liu ◽  
Jianzhong Lin
Keyword(s):  
Phase Separation ◽  
Multiphase Flow ◽  
Rheological Properties ◽  
Hydrodynamic Interactions ◽  
Flow Properties ◽  
Open Problems ◽  
Future Directions ◽  
Kinematic Characteristics

Multiphase flow with self-driven particles is ubiquitous and complex. Exploring the flow properties has both important academic meaning and engineering value. This review emphasizes some recent studies on multiphase flow with self-driven particles: the hydrodynamic interactions between self-propelled/self-rotary particles and passive particles; the aggregation, phase separation and sedimentation of squirmers; the influence of rheological properties on its motion; and the kinematic characteristics of axisymmetric squirmers. Finally, some open problems, challenges, and future directions are highlighted.

Pose Tracking in Augmented Reality of Cultural Heritage

2017 ◽  
Vol 1 (1) ◽  
pp. 123-131
Author(s):  
Daniel Asmar
Keyword(s):  
Augmented Reality ◽  
Cultural Heritage ◽  
Paper Briefly ◽  
Open Problems ◽  
Future Directions ◽  
Advantages And Disadvantages ◽  
Pose Tracking ◽  
Solution Methods

This paper briefly surveys pose tracking methods used for augmented reality applications in cultural heritage. The paper primarily benefits scholars and practitioners in the areas of electronic heritage. Pose tracking techniques are categorized as either being dependent or independent of their surrounding; accordingly, various solution methods in the literature are presented along with their advantages and disadvantages. I conclude the paper with a discussion on the open problems in pose tracking in cultural heritage and recommend future directions of research in this field.

Index, sub-index and sub-factor of groups with interactions to number theory

2019 ◽  
Vol 19 (06) ◽  
pp. 2050101
Author(s):  
M. H. Hooshmand
Keyword(s):  
Number Theory ◽  
Direct Product ◽  
Prime Numbers ◽  
Additive Number Theory ◽  
Open Problems ◽  
Famous Conjecture ◽  
Future Directions ◽  
Left And Right ◽  
The Difference ◽  
Equivalent Conditions

This paper is the first step of a new topic about groups which has close relations and applications to number theory. Considering the factorization of a group into a direct product of two subsets, and since every subgroup is a left and right factor, we observed that the index conception can be generalized for a class of factors. But, thereafter, we found that every subset [Formula: see text] of a group [Formula: see text] has four related sub-indexes: right, left, upper and lower sub-indexes [Formula: see text], [Formula: see text] which agree with the conception index of subgroups, and all of them are equal if [Formula: see text] is a subgroup or normal sub-semigroup of [Formula: see text]. As a result of the topic, we introduce some equivalent conditions to a famous conjecture for prime numbers (“every even number is the difference of two primes”) that one of them is: the prime numbers set is index stable (i.e. all of its sub-indexes are equal) in integers and [Formula: see text]. Index stable groups (i.e. those whose subsets are all index stable) are a challenging subject of the topic with several results and ideas. Regarding the extension of the theory, we give some methods for evaluation of sub-indexes, by using the left and right differences of subsets. At last, we pose many open problems, questions, a proposal for additive number theory, and show some future directions of researches and projects for the theory.

scholarly journals Clustering of microswimmers: interplay of shape and hydrodynamics

Soft Matter ◽  
2018 ◽  
Vol 14 (42) ◽  
pp. 8590-8603 ◽  
Author(s):  
Mario Theers ◽  
Elmar Westphal ◽  
Kai Qi ◽  
Roland G. Winkler ◽  
Gerhard Gompper
Keyword(s):  
Phase Separation ◽  
Hydrodynamic Interactions ◽  
Ellipsoidal Particles ◽  
Prolate Ellipsoidal

Motility-induced phase separation in systems of active self-propelled particles (puller, pusher, neutral) is strongly affected by hydrodynamic interactions—suppressed for spherical, enhanced for prolate ellipsoidal particles.

scholarly journals Rheological properties of sugarfree milk chocolate: Comparative study and optimisation

2017 ◽  
Vol 35 (No. 5) ◽  
pp. 440-448 ◽  
Author(s):  
Rasouli-Pirouzian Haniyeh ◽  
Peighardoust Seyed Hadi ◽  
Azadmard-Damirchi Sodeif
Keyword(s):  
Rheological Properties ◽  
Good Alternative ◽  
Casson Fluid ◽  
Bulking Agents ◽  
Rheological Characteristics ◽  
Flow Properties ◽  
Milk Chocolate ◽  
Simplex Lattice ◽  
Simplex Lattice Mixture Design ◽  
Different Levels

The effects of sugar substitutes on rheological characteristics of compound milk chocolate using a simplex-lattice mixture design were evaluated. For this purpose, two bulking agents (maltitol and xylitol) at different levels (0–100%) were used and ten formulations were examined in order to find the optimum levels. All chocolate samples showed shear thinning behaviour. It was found that compound milk chocolate behaved as a Casson fluid. Chocolate formulations containing the highest maltitol substitution resulted in similar flow properties compared to those of the control and hence can be a good alternative. The results demonstrated that chocolate combinations containing 87.8% maltitol and 12.2% xylitol were found as the optimum concentrations producing the most acceptable rheological properties.

Effect of nanofillers on the phase separation and rheological properties of poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends

2010 ◽  
Vol 49 (8) ◽  
pp. 827-836 ◽  
Author(s):  
V. F. Shumsky ◽  
I. Getmanchuk ◽  
T. Ignatova ◽  
Yu. Maslak ◽  
P. Cassagnau ◽  
...  
Keyword(s):  
Phase Separation ◽  
Methyl Methacrylate ◽  
Rheological Properties ◽  
Poly Methyl Methacrylate

The flow properties of axoplasm in a defined chemical environment: influence of anions and calcium

1979 ◽  
Vol 205 (1160) ◽  
pp. 323-345 ◽  
Keyword(s):  
Protease Inhibitor ◽  
Rheological Properties ◽  
Cellulose Acetate ◽  
Yield Stress ◽  
Plastic Viscosity ◽  
Chemical Environment ◽  
Flow Properties ◽  
Giant Axons ◽  
The Matrix ◽  
Anion Composition

The flow properties of axoplasm have been studied in a defined chemical environment. Axoplasm extruded from squid giant axons was introduced into porous cellulose acetate tubes of diameter roughly equal to that of the original axon. Passage of axoplasm along the tube rapidly coated the tube walls with a layer of protein. By measuring the rate of flow back and forth along the tube, the rheological properties of the axoplasm plug were investigated at a range of pressures and in a variety of media. Axoplasm behaves as a classical Bingham body the motion of which can be characterized by a yield stress ( θ ) and a plastic viscosity ( η p1 ). In a potassium methanesulphonate medium containing 65 nM free Ca 2+ , θ averaged 109 ± 46 dyn/cm 2 and η p1 146 ± 83 P. † These values were little affected by ATP, colchicine, cytocholasin B or by replacing K by Na but were sensitive to the anion composition of the medium. The effectiveness of different anions at reducing θ and η p1 was in the order SCN > I > Br > Cl > methanesul­phonate. θ and η p1 were also drastically reduced by increasing the ionized Ca. This effect required millimolar amounts of Ca, was unaffected by the presence of ATP and was irreversible. It could be blocked by the protease inhibitor TLCK. E. p. r. measurements showed that within the matrix of the axoplasm gel there is a watery space that is largely unaffected by anions or calcium.

scholarly journals Viscosity sinergism of hydrozypropmethyl and carboxy methyl cellulose

2008 ◽  
Vol 62 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Jaroslav Katona ◽  
Verica Sovilj ◽  
Lidija Petrovic
Keyword(s):  
Shear Rate ◽  
Rheological Properties ◽  
Binary Mixtures ◽  
Methyl Cellulose ◽  
Mass Ratio ◽  
Positive Deviation ◽  
Flow Properties ◽  
Concentration Changes ◽  
Overlap Concentration ◽  
Carboxy Methyl

Rheology modifiers are common constituents of food, cosmetic and pharmaceutic products. Often, by using two or more of them, better control of the product rheological properties can be achieved. In this work, rheological properties of hydroxypropymethyl cellulose (HPMC) and sodium carboxymethyl cellulose (NaCMC) solutions of different concentrations were investigated and compared to the flow properties of 1% HPMC/NaCMC binary mixtures at various HPMC/NaCMC mass ratios. Solutions of HPMC and NaCMC were found to be pseudoplastic, where pseudoplasticity increases with increase in the macromolecules concentration. Changes of the degree of pseudoplasticity, n as well as the coefficient of consistency, K with the concentration are more pronounced in HPMC solutions when compared to the NaCMC ones. This is mostly due to the ability of HPMC molecules to associate with each other at concentrations above critical overlap concentration, c , and greater flexibility of macromolecular chains. Binary mixtures of HPMC/NaCMC were also found to be pseudoplastic. Experimentally obtained viscosities of the mixture were proved to be larger than theoretically expected ones, indicating viscosity synergism as a consequence of HPMC-NaCMC interaction. Maximum in synergy was observed when HPMC/NaCMC mass ratio was 0.4/0.6, no matter of the shear rate applied. On the other hand, it was found that relative positive deviation, RPD decreases when shear rate is increased.

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