scholarly journals Nanochannel flow past permeable walls via molecular dynamics

AIP Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 075307 ◽  
Author(s):  
Jian-Fei Xie ◽  
Bing-Yang Cao
Keyword(s):  
Molecular Dynamics ◽  
Flow Past ◽  
Permeable Walls

Molecular Dynamics Study on Fluid Flow in Nanochannels With Permeable Walls

2016 ◽  
Author(s):  
Jian-Fei Xie ◽  
Bing-Yang Cao
Keyword(s):  
Molecular Dynamics ◽  
Boundary Condition ◽  
Fluid Flow ◽  
Slip Velocity ◽  
Smooth Surface ◽  
Porous Wall ◽  
Permeable Surface ◽  
Fluid Density ◽  
Maxwell Theory ◽  
Permeable Walls

This paper presents the fluid flow in nanochannels with permeable walls using the molecular dynamics (MD) simulations. A three-dimensional Couette flow has been carried out to investigate the effect of the permeable surface on the fluid density distributions and the slip velocity. The ordering layer of molecules is constructed near the smooth surface but it was destroyed by the permeable ones resulting in the density drop in porous wall. The fluid density in porous wall is large under strong fluid-structure interaction (FSI) and it is decreased under weak FSI. The negative slip is observed for fluid flow past solid walls under strong FSI, no-slip under medium FSI and positive slip under weak FSI whatever it is smooth or porous. Moreover, the largest slip velocity and slip length occur on the smooth surface of solid wall. As predicted by Maxwell theory, the molecule is bounced back when it impinges on the smooth surface. The molecules, however, can reside in porous wall by replacing the molecules that are trapped in the pores. Moreover, the molecule can escape from the pore and enter the channel becoming a free molecule. After travelling for a period time in the channel, the molecule can enter the pore again. During the molecular movement, the momentum exchange has been implemented not only between fluid molecules and wall but also between the fluid molecules themselves in the pore, and the multi-collision between fluid molecules takes place. The reduced slip velocity at the porous wall results in the larger friction coefficient compared to the smooth surface wall. The molecular boundary condition predicted by Maxwell theory on the smooth surface is no longer valid for flow past the permeable surface, and a novel boundary condition should be introduced.

Molecular dynamics simulation of flow past a plate

1986 ◽  
Vol 1 (2) ◽  
pp. 145-150 ◽  
Author(s):  
L. Hannon ◽  
G. C. Lie ◽  
E. Clementi
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Flow Past

Flow past a slender profile in a channel with permeable walls

1980 ◽  
Vol 15 (2) ◽  
pp. 265-270 ◽  
Author(s):  
N. A. Marevtseva
Keyword(s):  
Flow Past ◽  
Permeable Walls ◽  
Slender Profile

Mixed convection boundary layer flow past a wedge with permeable walls

2010 ◽  
Vol 46 (8-9) ◽  
pp. 1013-1018 ◽  
Author(s):  
Leli Deswita ◽  
Roslinda Nazar ◽  
Anuar Ishak ◽  
Rokiah Ahmad ◽  
Ioan Pop
Keyword(s):  
Boundary Layer ◽  
Mixed Convection ◽  
Boundary Layer Flow ◽  
Convection Boundary Layer ◽  
Flow Past ◽  
Convection Boundary ◽  
Permeable Walls ◽  
Layer Flow

Molecular dynamics study of flow past an obstacle in strongly coupled Yukawa liquids

2016 ◽  
Vol 23 (12) ◽  
pp. 123703 ◽  
Author(s):  
Harish Charan ◽  
Rajaraman Ganesh
Keyword(s):  
Molecular Dynamics ◽  
Strongly Coupled ◽  
Flow Past

scholarly journals Nanoscale flow past a colloidal cylinder confined in a slit channel: Lubrication theory and molecular dynamics analysis

2015 ◽  
Vol 27 (8) ◽  
pp. 082004 ◽  
Author(s):  
Amir M. Rahmani ◽  
Yang Shao ◽  
Mehlam Jupiterwala ◽  
Carlos E. Colosqui
Keyword(s):  
Molecular Dynamics ◽  
Lubrication Theory ◽  
Dynamics Analysis ◽  
Slit Channel ◽  
Flow Past
Sign in / Sign up

Export Citation Format

Share Document