The Effect Of Surface Roughness On Fluid Flow Through Narrow Rectangular Passages

1965 ◽  
Author(s):  
Ralph W. Veatch ◽  
Donald P. Helander ◽  
E.T. Guerrero
Keyword(s):  
Surface Roughness ◽  
Fluid Flow ◽  
Flow Through ◽  
Effect Of Surface

Effect of Surface Roughness on Gaseous Flow Through Microchannels

2000 ◽  
Author(s):  
Stephen E. Turner ◽  
Hongwei Sun ◽  
Mohammad Faghri ◽  
Otto J. Gregory
Keyword(s):  
Surface Roughness ◽  
Reynolds Number ◽  
Friction Factor ◽  
Reynolds Numbers ◽  
Helium Flow ◽  
Local Pressure ◽  
Aspect Ratios ◽  
Corrugated Surfaces ◽  
Flow Through ◽  
Effect Of Surface

Abstract This paper presents an experimental investigation on nitrogen and helium flow through microchannels etched in silicon with hydraulic diameters between 10 and 40 microns, and Reynolds numbers ranging from 0.3 to 600. The objectives of this research are (1) to fabricate microchannels with uniform surface roughness and local pressure measurement; (2) to determine the friction factor within the locally fully developed region of the microchannel; and (3) to evaluate the effect of surface roughness on momentum transfer by comparison with smooth microchannels. The friction factor results are presented as the product of friction factor and Reynolds number plotted against Reynolds number. The following conclusions have been reached in the present investigation: (1) microchannels with uniform corrugated surfaces can be fabricated using standard photolithographic processes; and (2) surface features with low aspect ratios of height to width have little effect on the friction factor for laminar flow in microchannels.

scholarly journals Equilibrium Molecular Dynamics Investigation of Fluid Slip in Nanoscale Channels

2018 ◽  
Vol 7 (3.27) ◽  
pp. 8 ◽  
Author(s):  
Mathews Daniel ◽  
Jeetu S Babu
Keyword(s):  
Molecular Dynamics ◽  
Surface Roughness ◽  
Fluid Flow ◽  
Solid Surface ◽  
Md Simulation ◽  
Aerodynamic Drag ◽  
Interfacial Slip ◽  
Different Types ◽  
Hydrodynamic Slip ◽  
Flow Through

Interfacial hydrodynamic slip is an importantfactor while considering fluid flow through nanochannels. Various studies have been done both in NEMD and EMD to study the fluid slippage over solid surface. Molecular Dynamics Study of Fluid Solid Interfacial Slip and its Effect on Aerodynamic Drag[1] is one such example where dependence of slip and the drag properties are studied. In this paper we try to examine different types of surface roughness affects the fluid slip with MD simulation of poiseuille flow.

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