Kinetic theory and molecular dynamics simulations of microscopic flows

1997 ◽  
Vol 9 (12) ◽  
pp. 3915-3925 ◽  
Author(s):  
Xue-Dong Din ◽  
Efstathios E. Michaelides
Keyword(s):  
Molecular Dynamics ◽  
Kinetic Theory ◽  
Molecular Dynamics Simulations ◽  
Dynamics Simulations

Determination of Condensation Coefficient and Boundary Condition for Kinetic Theory of Gases by Molecular Dynamics Simulations of Evaporation of Argon Into Vacuum

2003 ◽  
Author(s):  
Tatsuya Ishiyama ◽  
Takeru Yano ◽  
Shigeo Fujikawa
Keyword(s):  
Molecular Dynamics ◽  
Boundary Condition ◽  
Kinetic Theory ◽  
Molecular Dynamics Simulations ◽  
Triple Point ◽  
Kinetic Theory Of Gases ◽  
Condensation Coefficient ◽  
Point Temperature ◽  
Dynamics Simulations ◽  
Triple Point Temperature

Molecular dynamics simulations at liquid-vapor equilibrium condition and evaporation condition into vacuum were carried out to investigate the boundary condition for the kinetic theory of gases. The determination method for condensation coefficient α consistent with the kinetic theory is also proposed. It was found that α for argon at an equilibrium state is close to unity near the triple point temperature of the bulk liquid, and decreases gradually as the temperature rises. The velocity distribution of molecules evaporating into vacuum becomes nearly half-Maxwellian near the triple point temperature, and is deformed as the temperature rises.

scholarly journals Homogeneous cooling and heating states of dilute soft-core gases under nonlinear drag

2021 ◽  
Vol 249 ◽  
pp. 04001
Author(s):  
Satoshi Takada
Keyword(s):  
Molecular Dynamics ◽  
Kinetic Theory ◽  
Velocity Distribution ◽  
Molecular Dynamics Simulations ◽  
Drag Force ◽  
Soft Core ◽  
Temperature Evolution ◽  
Theoretical Predictions ◽  
Dynamics Simulations ◽  
Good Agreement

The temperature evolution of dilute soft inertial gas-solid suspensions is theoretically analyzed when the gas particles are influenced by a nonlinear drag force from a background fluid. The kinetic theory is extended to this system, and the time evolutions of the temperature and the kurtosis of the velocity distribution are derived. Molecular dynamics simulations are also performed to check the validity of the theory, and they show good agreement with the theoretical predictions.

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