Measurement of Complex Rheology and Jettability of Inkjet Inks

2017 ◽  
pp. 409-430 ◽  
Author(s):  
Tri Tuladhar
Keyword(s):  
Complex Rheology

scholarly journals On Finite Strains in Continua with Complex Rheology

2017 ◽  
Vol 788 ◽  
pp. 012054 ◽  
Author(s):  
E Murashkin ◽  
V Klindukhov
Keyword(s):  
Finite Strains ◽  
Complex Rheology

Soft EHL Lubrication of Complex Multiphase Fluids

2005 ◽  
Author(s):  
J. de Vicente ◽  
H. A. Spikes ◽  
J. R. Stokes
Keyword(s):  
Complex Fluids ◽  
Steel Ball ◽  
Film Forming ◽  
Wide Range ◽  
Multiphase Fluids ◽  
Water Based ◽  
Complex Rheology ◽  
Lubrication Properties ◽  
Flat Contact ◽  
Ehl Lubrication

The lubrication properties of a series of multiphase water-based fluids of complex rheology and microstructure, including o/w emulsions, have been studied in a rolling-sliding steel ball-on-elastomer flat contact. The results show that friction curves of Newtonian fluids made over a wide range of entrainment speeds and viscosity can be used to identify the prevailing mechanisms of lubrication for more complex fluids and, for emulsions, to show the predominant film-forming phase.

Tearing a hydrogel of complex rheology

2019 ◽  
Vol 125 ◽  
pp. 749-761 ◽  
Author(s):  
Ruobing Bai ◽  
Baohong Chen ◽  
Jiawei Yang ◽  
Zhigang Suo
Keyword(s):  
Complex Rheology

scholarly journals Brownian Motion in the Fluids with Complex Rheology

2015 ◽  
Vol 10 (4) ◽  
pp. 1-43 ◽  
Author(s):  
V. V. Rusakov ◽  
Yu. L. Raikher ◽  
R. Perzynski
Keyword(s):  
Brownian Motion ◽  
Complex Rheology

Effect of Lubrication of Fluid Friction Bearings with Media of Complex Rheology

2014 ◽  
Vol 630 ◽  
pp. 199-207 ◽  
Author(s):  
Leonid Savin ◽  
Alexey Kornaev ◽  
Elena Kornaeva
Keyword(s):  
Carrying Capacity ◽  
Computer Experiment ◽  
Friction Torque ◽  
Friction Loss ◽  
Shear Strain Rate ◽  
Fluid Friction ◽  
Lubricating Material ◽  
Two Dimensional Flow ◽  
Complex Rheology ◽  
Friction Bearings

The paper investigates the two-dimensional flow of an incompressible viscous fluid of complex rheology in the gap between two cylinders with respect to fluid friction bearings. The viscosity of the fluid is defined as a physical quantity field, satisfying the criterion of minimum friction loss approximated as a function of shear-strain rate and pressure. The resulting function is used to calculate the carrying capacity and the friction torque in the bearing. Computer experiment resulted in showing the effect of friction loss lowering due to considering complex rheology of lubricating material.

scholarly journals Inertial Method of Viscosity Measurement of the Complex Rheology Medium

2016 ◽  
Vol 150 ◽  
pp. 626-634
Author(s):  
E. Kornaeva ◽  
A. Kornaev ◽  
L. Savin
Keyword(s):  
Viscosity Measurement ◽  
Inertial Method ◽  
Complex Rheology

scholarly journals A constitutive model with microstructure evolution for flow of rate-independent granular materials

2011 ◽  
Vol 682 ◽  
pp. 590-616 ◽  
Author(s):  
JIN SUN ◽  
SANKARAN SUNDARESAN
Keyword(s):  
Friction Coefficient ◽  
Constitutive Model ◽  
Granular Materials ◽  
Simple Shear ◽  
Evolution Equations ◽  
Complex Loading ◽  
Dem Simulations ◽  
Particle Level ◽  
Complex Rheology ◽  
Using Data

A constitutive model is developed for the complex rheology of rate-independent granular materials. The closures for the pressure and the macroscopic friction coefficient are linked to microstructure through evolution equations for coordination number and fabric. The material constants in the model are functions of particle-level properties and are calibrated using data generated through simulations of steady and unsteady simple shear using the discrete element method (DEM). This model is verified against DEM simulations at complex loading conditions.

scholarly journals Analysis of the Dispersion of Viscoelastic Clusters in the Industrial Rotor-Stator Equipment

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2232
Author(s):  
Alexander Kolomiets ◽  
Tomas Jirout
Keyword(s):  
Shear Stress ◽  
Cfd Simulation ◽  
Good Choice ◽  
Complex Shear Modulus ◽  
Special Equipment ◽  
Complex Shear ◽  
Complex Rheology ◽  
Process Line ◽  
Specific Material ◽  
The Stability

Materials with complex rheology and viscoelasticity may require special equipment for processing, such as for dispergation. Rheological and mechanical data of the material can help with finding the required equipment or designing equipment. For highly viscous and complex material, a rotor-stator mixer can be a good choice for dispergation. Due to the laminar or creeping mechanism of flow inside the equipment, the dispergation mechanism is assumed to be a combination of the shear stress and slicing of the material by the rotor and stator blades. For the validation of the theory, the mechanical properties of the viscose identified in a previous work were used for comparison with the data from the CFD simulation of the rotor-stator mixer. The comparison showed that the rotor-stator device can overcome the complex shear modulus and ultimate strength of the material and homogenize the solution through a combination of the shear stress and slicing. The theory was also confirmed on the process line proposed for homogenization of the specific material. The stability of viscosity during the process of homogenization was measured and used as the main parameter for quality assessment.

scholarly journals Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Jing Shang ◽  
Ruonan Gao ◽  
Fu Su ◽  
Huaguang Wang ◽  
Dan Zhu
Keyword(s):  
Phase Transition ◽  
Particle Size ◽  
Depletion Effect ◽  
Transmission Electron ◽  
Particle Size And Morphology ◽  
Complex Rheology ◽  
Colloidal Probes ◽  
Size And Morphology ◽  
Collapsed States ◽  
Good Probe

The complex rheology and the phase behavior of thermally sensitive poly(N-isopropylacrylamide) (PNIPAM) microgels have been investigated in both the swollen and collapsed states by using microrheology. To avoid the interactions between the tracer probes and the PNIPAM microgels, such as the adsorption or the depletion effect, the probes of silica (SiO2) particles have been grafted with PNIPAM chains (SiO2-PNIPAM) and characterized with Fourier transform infrared spectroscopy (FTIR). The successful preparation of SiO2-PNIPAM has also been proved by the investigation of the particle size and morphology with dynamic light scattering (DLS) and transmission electron microscope (TEM) below and beyond the phase transition temperature of PNIPAM. The microrheology of the PNIPAM microgel suspension has been investigated by using the prepared SiO2-PNIPAM particles as microrheological probes, and the results show that the diffusive coefficient of the probes in the swollen state is one-fifth of that in the collapsed state, and the viscosity of the PNIPAM microgel suspension in the swollen state is four times higher than that in the collapsed state, indicating SiO2-PNIPAM is a good probe in the microrheological study of PNIPAM microgel suspensions.

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