scholarly journals Experimental Investigation on Rheological Properties of Water Based Novel Ternary Hybrid Nanofluids

2021 ◽  
Author(s):  
Mohammed Zayan ◽  
Abdul Khaliq Rasheed ◽  
Akbar John ◽  
Mohammed Khalid ◽  
Ahmad Faris
Keyword(s):  
Hybrid Nanoparticles ◽  
Damping Factor ◽  
Rheological Characterization ◽  
Viscosity Models ◽  
Water Based ◽  
Plastic Fluid ◽  
Linear Viscoelastic ◽  
The Stability ◽  
Good Agreement

This study presents the rheological characterization of deionised water dispersed with two different ternary-hybrid nanoparticles namely, GO-TiO2-Ag and rGO-TiO2-Ag. The stability of 0.05 wt% nanofluid samples are serially diluted by 10 fold in 5 levels is determined using zeta potential measurements. The non-linear viscoelastic measurements at temperatures ranging from 25oC to 50oC reveal that the graphene based ternary hybrid nanoparticle nanofluids exhibit Newtonian behaviour at higher concentrations. However, it displays shear thinning or pseudo-plastic fluid characteristics at lower concentration, suggesting a potential influence of nanoparticle aggregation on the viscosity. The experimental results are found to be in good agreement with the existing water based viscosity models. In addition, the effect due to shear stress, angular sweep, frequency sweep and damping factor ratio is also plotted.

scholarly journals Experimental Investigation on Rheological Properties of Water Based Novel Ternary Hybrid Nanofluids

2021 ◽  
Author(s):  
Mohammed Zayan ◽  
Abdul Khaliq Rasheed ◽  
Akbar John ◽  
Mohammed Khalid ◽  
Ahmad Faris
Keyword(s):  
Hybrid Nanoparticles ◽  
Damping Factor ◽  
Rheological Characterization ◽  
Viscosity Models ◽  
Water Based ◽  
Plastic Fluid ◽  
Linear Viscoelastic ◽  
The Stability ◽  
Good Agreement

This study presents the rheological characterization of deionised water dispersed with two different ternary-hybrid nanoparticles namely, GO-TiO2-Ag and rGO-TiO2-Ag. The stability of 0.05 wt% nanofluid samples are serially diluted by 10 fold in 5 levels is determined using zeta potential measurements. The non-linear viscoelastic measurements at temperatures ranging from 25oC to 50oC reveal that the graphene based ternary hybrid nanoparticle nanofluids exhibit Newtonian behaviour at higher concentrations. However, it displays shear thinning or pseudo-plastic fluid characteristics at lower concentration, suggesting a potential influence of nanoparticle aggregation on the viscosity. The experimental results are found to be in good agreement with the existing water based viscosity models. In addition, the effect due to shear stress, angular sweep, frequency sweep and damping factor ratio is also plotted.

scholarly journals Experimental Investigation on Rheological Properties of Water Based Novel Ternary Hybrid Nanofluids

2021 ◽  
Author(s):  
Mohammed Zayan ◽  
Abdul Khaliq Rasheed ◽  
Akbar John ◽  
Mohammed Khalid ◽  
Ahmad Faris
Keyword(s):  
Hybrid Nanoparticles ◽  
Damping Factor ◽  
Rheological Characterization ◽  
Viscosity Models ◽  
Water Based ◽  
Plastic Fluid ◽  
Linear Viscoelastic ◽  
The Stability ◽  
Good Agreement

This study presents the rheological characterization of deionised water dispersed with two different ternary-hybrid nanoparticles namely, GO-TiO2-Ag and rGO-TiO2-Ag. The stability of 0.05 wt% nanofluid samples are serially diluted by 10 fold in 5 levels is determined using zeta potential measurements. The non-linear viscoelastic measurements at temperatures ranging from 25oC to 50oC reveal that the graphene based ternary hybrid nanoparticle nanofluids exhibit Newtonian behaviour at higher concentrations. However, it displays shear thinning or pseudo-plastic fluid characteristics at lower concentration, suggesting a potential influence of nanoparticle aggregation on the viscosity. The experimental results are found to be in good agreement with the existing water based viscosity models. In addition, the effect due to shear stress, angular sweep, frequency sweep and damping factor ratio is also plotted.

Experimental Characterization of a T-Shaped Programmable Multistable Mechanism

2018 ◽  
Vol 140 (9) ◽  
Author(s):  
Mohamed Zanaty ◽  
Simon Henein
Keyword(s):  
Numerical Simulations ◽  
Reaction Force ◽  
Experimental Measurements ◽  
Experimental Characterization ◽  
Stable States ◽  
Stability Behavior ◽  
The Stability ◽  
Force Characteristics ◽  
Good Agreement

Programmable multistable mechanisms (PMM) exhibit a modifiable stability behavior in which the number of stable states, stiffness, and reaction force characteristics are controlled via their programming inputs. In this paper, we present experimental characterization for the concept of stability programing introduced in our previous work (Zanaty et al., 2018, “Programmable Multistable Mechanisms: Synthesis and Modeling,” ASME J. Mech. Des., 140(4), p. 042301.) A prototype of the T-combined axially loaded double parallelogram mechanisms (DPM) with rectangular hinges is manufactured using electrodischarge machining (EDM). An analytical model based on Euler–Bernoulli equations of the T-mechanism is derived from which the stability behavior is extracted. Numerical simulations and experimental measurements are conducted on programming the mechanism as monostable, bistable, tristable, and quadrastable, and show good agreement with our analytical derivations within 10%.

Rheological characterization of water-based slurries for the tape casting process

2002 ◽  
Vol 28 (6) ◽  
pp. 675-683 ◽  
Author(s):  
Bernd Bitterlich ◽  
Christiane Lutz ◽  
Andreas Roosen
Keyword(s):  
Tape Casting ◽  
Casting Process ◽  
Rheological Characterization ◽  
Water Based

scholarly journals Rheological characterization of the curing process for a water-based epoxy added with polythiol crosslinking agent

2019 ◽  
Vol 71 (5) ◽  
pp. 162-167
Author(s):  
Maria Myrelle S. Quiambao ◽  
Danilo D. Laplana ◽  
Miguel Ibarra D. Abobo ◽  
Angelica G. Jancon ◽  
Sonia D. Salvador ◽  
...  
Keyword(s):  
Crosslinking Agent ◽  
Curing Process ◽  
Rheological Characterization ◽  
Water Based

scholarly journals Physico-chemical and rheological characterization of water-based mud in the presence of polymers

2015 ◽  
Vol 6 (2) ◽  
pp. 185-190 ◽  
Author(s):  
B. Safi ◽  
S. Zarouri ◽  
R. Chabane-Chaouache ◽  
M. Saidi ◽  
A. Benmounah
Keyword(s):  
Rheological Characterization ◽  
Physico Chemical ◽  
Water Based

Synthesis and microstructural characterization of inorganic fullerene-like MoS2 and graphite-MoS2 hybrid nanoparticles

2006 ◽  
Vol 21 (4) ◽  
pp. 1033-1040 ◽  
Author(s):  
J.J. Hu ◽  
J.H. Sanders ◽  
J.S. Zabinski
Keyword(s):  
Arc Discharge ◽  
Energy Dispersive Spectrometer ◽  
Microstructural Characterization ◽  
Hybrid Nanoparticles ◽  
Solid Core ◽  
Inorganic Fullerene ◽  
Transmission Electron ◽  
Water Based ◽  
Graphite Rods

The structures of inorganic fullerene-like (IF) MoS2 nanoparticles produced by arc discharge in water are reported in this paper. To adjust the chemistry and structure of IF nanoparticles, 2H–MoS2, graphite and composite 2H–MoS2/graphite rods were used as electrodes in the arc synthesis. In comparison to using MoS2 as both anode and cathode, mixed electrodes (graphite and MoS2) significantly increased the discharge current. Various IF-MoS2 nanoparticles were successfully produced by the water-based arc method, and their microstructures were studied using a transmission electron microscope equipped with an x-ray energy dispersive spectrometer. The IF–MoS2 nanoparticles commonly had a solid core wrapped with a few MoS2 layers and exhibit some differences in size and geometry. The IF-MoS2 nanoparticles were typically 5–30 nm in diameter as observed by transmission electron microscopy. Tiny IF-MoS2 nanoparticles (<10 nm) along with fragments of lamellar MoS2 were produced from arc discharge in water using both graphite and MoS2 electrodes. Carbon nano-onions and hybrid nanoparticles consisting of carbon and MoS2 were synthesized by using mixed electrodes of graphite and 2H–MoS2. The hybrid nanoparticles were MoS2 cores covered by a graphite shell. Our results show that the water-based arc method provides a simple tool for producing a variety of nanoparticles including some familiar and some new hybrid structures.

scholarly journals Rheological Characterization of Yield-Stress Fluids with Brookfield Viscometer

2021 ◽  
Vol 31 (1) ◽  
pp. 1-9
Author(s):  
Andrei Potanin ◽  
Greggory Marron
Keyword(s):  
Yield Stress ◽  
Accurate Data ◽  
Viscosity Method ◽  
Rheological Characterization ◽  
Simple Method ◽  
Yield Stress Fluids ◽  
Apparent Shear Rate ◽  
Selection Of ◽  
Good Agreement

Abstract This paper analyzes various techniques to use viscometers equipped with vane spindles to characterize rheological properties of yield stress fluids. Specifically, application of Brookfield viscometers to this end is discussed. A wide selection of toothpastes and lotions were tested. It is shown that a simple method based on apparent shear rate and stress, commonly referred to as a representative viscosity method, works well for moderately non-Newtonian samples but may significantly underestimate viscosity for samples with a more pronounced yield stress behavior. To get more accurate data an integral equation relating torque to angular velocity needs to be solved which can be easily done numerically to get a good agreement between the data collected on an inexpensive viscometer and the data from high-end rheometers.

scholarly journals Characterization of Functionally Graded Timoshenko Beams with Variable Rotational Speed

2019 ◽  
Vol 8 (4) ◽  
pp. 5926-5931
Keyword(s):  
Rotational Speed ◽  
Angular Speed ◽  
Functionally Graded ◽  
Timoshenko Beams ◽  
The Finite Element Method ◽  
Axial Loads ◽  
Fgm Beam ◽  
The Stability ◽  
Good Agreement

This paper investigates the free vibration characteristics and stability of a functionally graded Timoshenko beam spinning with variable angular speed. Material properties of the beam are assumed to be varied continuously along the thickness of the beam according to a power law and exponential law. The results show that increasing beam rotational speed increases fundamental mode frequency and the beam becomes more and more stable at higher speeds. This paper reports the dynamic behaviour of a rotating FGM beam subjected to axial periodic forces using the finite element method. The numerical results show good agreement with the reported beams models. Effects of static and time dependent components of axial loads on the stability of the FGM beam have been studied.

Study on Rheological Characterization of Uncured Natural Rubber with Different Initial Moisture Contents Dried by Microwave

2014 ◽  
Vol 998-999 ◽  
pp. 383-386
Author(s):  
Fu Quan Zhang ◽  
Yong Zhou Wang ◽  
Mei Chen ◽  
Mao Fang Huang ◽  
Ri Zhong Zeng
Keyword(s):  
Natural Rubber ◽  
Viscoelastic Behavior ◽  
Sweep Frequency ◽  
Rheological Characterization ◽  
Moisture Contents ◽  
Linear Viscoelastic Behavior ◽  
Linear Viscoelastic ◽  
Strain Sweep ◽  
Viscous Torque

In this work, the rheological behavior of uncured natural rubber with different initial moisture contents dried by microwave was studied using RPA under frequency sweep and strain sweep modes. It can be seen from the results that the variation trend of viscous torque S`` versus sweep frequency kept with the trend of elastic torque S` versus sweep frequency. Moreover, the viscous torque S`` values were lower than those for elastic torque S`, a good linear relation curve was obtained by plotting elastic torque S` versus sweep frequency. The curve of storage shear modulus G` versus sweep strain presented a linear relationship, showed a linear viscoelastic behavior of uncured natural rubber with different initial moisture contents. This may be explained by the degradation of molecular chains of natural rubber and the van der waals forces between them.

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