Role of compatibilizer in multicomponent polymer mixtures under shear flow

Soft Matter ◽  
2013 ◽  
Vol 9 (1) ◽  
pp. 255-260 ◽  
Author(s):  
Ruohai Guo ◽  
Jialin Li ◽  
Li-Tang Yan ◽  
Xu-Ming Xie
Keyword(s):  
Shear Flow ◽  
Polymer Mixtures ◽  
Multicomponent Polymer

scholarly journals Relaxation of scratch-induced surface deformation in silicate glasses: Role of densification and shear flow in lateral indentation experiments

2018 ◽  
Vol 500 ◽  
pp. 382-387 ◽  
Author(s):  
Elham Moayedi ◽  
Shigeki Sawamura ◽  
Jana Hennig ◽  
Enrico Gnecco ◽  
Lothar Wondraczek
Keyword(s):  
Shear Flow ◽  
Surface Deformation ◽  
Silicate Glasses

Partial Molar Volumes and Thermal Expansion Coefficients as an Explanation for Co-Solvent Effect of Penetrants in Multicomponent Polymer Mixtures

2015 ◽  
Vol 216 (21) ◽  
pp. 2129-2140 ◽  
Author(s):  
Muhammad Ahsan Bashir ◽  
Vincent Monteil ◽  
Vasileios Kanellopoulos ◽  
Mohammad Al-Haj Ali ◽  
Timothy McKenna
Keyword(s):  
Thermal Expansion ◽  
Solvent Effect ◽  
Partial Molar Volumes ◽  
Polymer Mixtures ◽  
Molar Volumes ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients ◽  
Multicomponent Polymer

Generation of Short-scale Electrostatic Fields in the Solar Atmosphere and the Role of Helium Ions

2021 ◽  
Vol 922 (1) ◽  
pp. 48
Author(s):  
H. Saleem ◽  
Shaukat Ali Shan ◽  
A. Rehman
Keyword(s):  
Shear Flow ◽  
Transition Region ◽  
Electric Fields ◽  
Hydrogen Plasma ◽  
Theoretical Models ◽  
Inhomogeneous Field ◽  
Helium Ions ◽  
Low Frequencies ◽  
Short Scale

Abstract Theoretical models are presented to show that expansion of plasma in the radial direction from a denser solar surface to a rarefied upper atmosphere with short-scale inhomogeneous field-aligned flows and currents in the form of thin threads itself is an important source of electrostatic instabilities. Multifluid theory shows that the shear flow–driven purely growing electric fields appear in the transition region. On the other hand, plasma kinetic theory predicts that the short-scale current sheets (or filaments) produce current-driven electrostatic ion acoustic (CDEIA) waves in the hydrogen plasma of the transition region that damp out in the system through wave–particle interactions and increase the temperature. Similar processes take place in the solar corona and act positively for increasing the temperature further and maintaining it. The shear flow–driven instabilities and CDEIA waves have short perpendicular wavelengths of the order of 1 m and low frequencies of the order of 1 or several Hz when the ions’ shear flow scale length is considered to be of the order of 1 km. It is pointed out that the purely growing fluid instabilities turn into oscillatory instabilities and the growth rates of kinetic CDEIA wave instabilities are reduced when the dynamics of 10% helium ions is taken into account along with 90% hydrogen ions. Therefore, the role of helium ions should not be ignored in the study of wave dynamics in solar plasma.

Direct Numerical Simulation of Drops in Three Dimensional Viscoelastic Simple Shear Flows

2001 ◽  
Author(s):  
Shriram B. Pillapakkam ◽  
Pushpendra Singh
Keyword(s):  
Numerical Simulation ◽  
Shear Flow ◽  
Direct Numerical Simulation ◽  
Viscoelastic Fluid ◽  
Simple Shear ◽  
Polymer Concentration ◽  
Three Dimensional ◽  
Simple Shear Flow ◽  
Splitting Technique

Abstract A three dimensional finite element scheme for Direct Numerical Simulation (DNS) of viscoelastic two phase flows is implemented. The scheme uses the Level Set Method to track the interface and the Marchuk-Yanenko operator splitting technique to decouple the difficulties associated with the governing equations. Using this numerical scheme, the shape of Newtonian drops in a simple shear flow of viscoelastic fluid and vice versa are analyzed as a function of Capillary number, Deborah number and polymer concentration. The viscoelastic fluid is modeled via the Oldroyd-B model. The role of viscoelastic stresses in deformation of a drop subjected to simple shear flow and its effect on the steady state shape is analyzed. Our results compare favorably with existing experimental data and also help in understanding the role of viscoelastic stresses in drop deformation.

THE ROLE OF WAVES ONFLOW RESISTANCE IN HIGH-SPEED SHEAR FLOW

2019 ◽  
Author(s):  
SHOOKA KARIMPOUR ◽  
VINCENT H. CHU
Keyword(s):  
Shear Flow ◽  
High Speed

Phase separating colloid polymer mixtures in shear flow

2008 ◽  
Vol 20 (40) ◽  
pp. 404208 ◽  
Author(s):  
Didi Derks ◽  
Dirk G A L Aarts ◽  
Daniel Bonn ◽  
Arnout Imhof
Keyword(s):  
Shear Flow ◽  
Polymer Mixtures

13C-NMR sequence determination for multicomponent polymer mixtures

1988 ◽  
Vol 35 (6) ◽  
pp. 1639-1650 ◽  
Author(s):  
H. N. Cheng
Keyword(s):  
13C Nmr ◽  
Polymer Mixtures ◽  
Sequence Determination ◽  
Multicomponent Polymer

Role of Landau Damping in Crossed-Field Electron Beams and Inviscid Shear Flow

1970 ◽  
Vol 13 (2) ◽  
pp. 421 ◽  
Author(s):  
R. J. Briggs
Keyword(s):  
Shear Flow ◽  
Electron Beams ◽  
Landau Damping ◽  
Field Electron
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