Experimental Investigation and Molecular Dynamics Simulations of Viscosity of CNT-Water Nanofluid at Different Temperatures and Volume Fractions of Nanoparticles

2018 ◽  
Vol 64 (1) ◽  
pp. 262-272 ◽  
Author(s):  
Fatemeh Jabbari ◽  
Seyfolah Saedodin ◽  
Ali Rajabpour
Keyword(s):  
Molecular Dynamics ◽  
Experimental Investigation ◽  
Molecular Dynamics Simulations ◽  
Volume Fractions ◽  
Different Temperatures ◽  
Dynamics Simulations

Deformation Behaviour of Single Linear Surface Defect Nickel Nanowire at Different Temperatures Studied by Molecular Dynamics Simulations

2020 ◽  
Vol 978 ◽  
pp. 428-435
Author(s):  
Krishna Chaitanya Katakam ◽  
Natraj Yedla
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Surface Defect ◽  
Deformation Behaviour ◽  
Stacking Faults ◽  
Effect Of Temperature ◽  
Dislocation Densities ◽  
Different Temperatures ◽  
Nickel Nanowire ◽  
Dynamics Simulations

The mechanical properties and deformation mechanism of nickel nanowire of dimension 100 Å (x-axis) × 1000 Å (y-axis) × 100 Å (z-axis) containing a single linear surface defect is studied at different temperatures using molecular dynamics simulations. The defect is created by deleting a row of atoms on the surface and is inclined at 25° to the loading axis. The tensile test is carried out at 0.01 K, 10 K, 100 K and 300 K temperature and 108 s-1strain rate. To determine the effect of temperature on the stress-strain curves, fracture and failure mechanism, a thorough investigation has taken place. Maximum strength of 21.26 GPa is observed for NW deformed at 0.01 K temperature and the strength decreased with increase in temperature. Through slip lines, the deformation relief pattern taken place by developing the extrusion areas along with intrusion over the surface defect area in all NWs deformed at respective temperatures. Further it is observed that fracture strains decrease with increase in temperature. After yielding, stacking faults associated with dislocations are generated by slip on all four {111} planes. Different type of dislocations with both intrinsic and extrinsic stacking faults are noticed. Out of all dislocation densities, Shockley partial dislocation densities has recorded a maximum value.

scholarly journals Investigation of interfacial thermal transport across graphene and an organic semiconductor using molecular dynamics simulations

2017 ◽  
Vol 19 (24) ◽  
pp. 15933-15941 ◽  
Author(s):  
Xinyu Wang ◽  
Jingchao Zhang ◽  
Yue Chen ◽  
Paddy K. L. Chan
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Organic Semiconductor ◽  
Thermal Transport ◽  
Different Temperatures ◽  
Dynamics Simulations

We investigate the thermal transport across graphene and an organic semiconductor at different temperatures, levels of hydrogenation and vacancies.

scholarly journals Study of the stability and unfolding mechanism of BBA1 by molecular dynamics simulations at different temperatures

1999 ◽  
Vol 8 (6) ◽  
pp. 1292-1304 ◽  
Author(s):  
Lu Wang ◽  
Yong Duan ◽  
Rebecca Shortle ◽  
Barbara Imperiali ◽  
Peter A. Kollman
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Different Temperatures ◽  
The Stability ◽  
Dynamics Simulations

The Unravelling of Open-Ended Single Walled Carbon Nanotubes Using Molecular Dynamics Simulations

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Tarek Ragab ◽  
Cemal Basaran
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Molecular Dynamics Simulations ◽  
Single Walled Carbon Nanotubes ◽  
Atomic Chain ◽  
Single Walled Carbon ◽  
Different Temperatures ◽  
Dynamics Simulations ◽  
Walled Carbon Nanotubes

The unravelling of (10, 10) and (18, 0) single-walled carbon nanotubes (SWCNTs) is simulated using molecular dynamics simulations at different temperatures. Two different schemes are proposed to simulate the unravelling; completely restraining the last atom in the chain and only restraining it in the axial direction. The forces on the terminal atom in the unravelled chain in the axial and radial directions are reported till the separation of the atomic chain from the carbon nanotube structure. The force-displacement relation for a chain structure at different temperatures is calculated and is compared to the unravelling forces. The axial stresses in the body of the carbon nanotube are calculated and are compared to the failure stresses of that specific nanotube. Results show that the scheme used to unravel the nanotube and the temperature can only effect the duration needed before the separation of some or all of the atomic chain from the nanotube, but does not affect the unravelling forces. The separation of the atomic chain from the nanotube is mainly due to the impulsive excessive stresses in the chain due to the addition of a new atom and rarely due to the steady stresses in the chain. From the simulations, it is clear that the separation of the chain will eventually happen due to the closing structure occurring at the end of the nanotube that would not be possible in multiwalled nanotubes.

scholarly journals Molecular dynamics simulations of various metastable structures on Si(001) at different temperatures

2005 ◽  
Vol 54 (9) ◽  
pp. 4313
Author(s):  
Wang Chang-Qing ◽  
Jia Yu ◽  
Ma Bing-Xian ◽  
Wang Song-You ◽  
Qin Zhen ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Metastable Structures ◽  
Different Temperatures ◽  
Dynamics Simulations

Molecular dynamics study of coil-to-globule transition in a thermo-responsive oligomer bound to various surfaces: hydrophilic surfaces stabilize the coil form

2018 ◽  
Vol 20 (47) ◽  
pp. 29754-29763 ◽  
Author(s):  
Giuseppe Consiglio ◽  
Giuseppe Forte
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Hydrophilic Surfaces ◽  
Responsive Polymer ◽  
Different Temperatures ◽  
Dynamical Properties ◽  
Dynamics Simulations ◽  
Covalently Bound

The structural and dynamical properties of 40-mer of thermo-responsive polymer PNIPAM covalently bound to different surfaces have been studied, at different temperatures, by means of molecular dynamics simulations.

H Motion in Pd and Nb: A Molecular-Dynamics Study

1992 ◽  
Vol 291 ◽  
Author(s):  
Yinggang Li ◽  
Göran Wahnström
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Detailed Comparison ◽  
Scattering Data ◽  
Many Body ◽  
Different Temperatures ◽  
Quasielastic Neutron ◽  
Nonadiabatic Effects ◽  
Quasielastic Neutron Scattering ◽  
Dynamics Simulations

ABSTRACTBased on realistic many-body potentials molecular-dynamics simulations are carried out for PdH0.03 and NbH0.02. The H motion is investigated at two different temperatures, T = 300 and 600K, paying attention to the vibrational and diffusive motion. We find that the motion of H in Nb, a bcc metal, is more complicated than in Pd, a fee metal, and the differences are discussed. When detailed comparison is made with quasielastic neutron scattering data for H in Pd at 600K, we argue that in order to characterize the diffusion correctly, one has to include nonadiabatic effects.

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