Temperature and Pressure Dependence of Polystyrene Dynamics through Molecular Dynamics Simulations and Experiments

2011 ◽  
Vol 44 (2) ◽  
pp. 393-402 ◽  
Author(s):  
Vagelis A. Harmandaris ◽  
George Floudas ◽  
Kurt Kremer
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Pressure Dependence ◽  
Temperature And Pressure ◽  
Dynamics Simulations

scholarly journals A NOVEL DESIGN OF PERISTALTIC CARBON NANO PUMP AND AN ANALYSIS OF HELIUM FLOW

2021 ◽  
Vol 55 (6) ◽  
Author(s):  
M. Gokhan Günay ◽  
Ubade Kemerli
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Pump Design ◽  
Helium Atoms ◽  
Multi Walled Carbon Nanotubes ◽  
Temperature And Pressure ◽  
Dynamics Simulations ◽  
Walled Carbon Nanotubes ◽  
Novel Design ◽  
Main Carbon

A novel nano-scale pump that can transport atoms or small molecules with a peristaltic motion is designed. It is proven by molecular-dynamics simulations that the introduced nano-pump design works properly. The designed nano-pump consists of one main carbon nanotube named the flow tube and two rotors where multi-walled carbon nanotubes are attached. The pumping of helium atoms by the designed peristaltic carbon nano-pump is investigated by molecular-dynamics simulations. For varying rotor speeds and blade counts, time-averaged velocity, temperature, and pressure results of pumped helium atoms are calculated, and relationships between them are modeled as polynomial surfaces. The results showed that rotor frequency increases the velocity of helium linearly and the temperature and pressure of helium non-linearly. Furthermore, the blade count of the proposed mechanism does not substantially affect the velocity as per the previous studies in the literature.

Accurate and efficient integration for molecular dynamics simulations at constant temperature and pressure

2013 ◽  
Vol 139 (16) ◽  
pp. 164106 ◽  
Author(s):  
Ross A. Lippert ◽  
Cristian Predescu ◽  
Douglas J. Ierardi ◽  
Kenneth M. Mackenzie ◽  
Michael P. Eastwood ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Constant Temperature ◽  
Efficient Integration ◽  
Temperature And Pressure ◽  
Dynamics Simulations
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