scholarly journals A Study of Velocity and Temperature Slip Effects on Flow of Water Based Nanofluids in Converging and Diverging Channels

Author(s):  
Syed Tauseef Mohyud-Din ◽  
Umar Khan ◽  
Naveed Ahmed ◽  
Waseem Sikander
2021 ◽  
Author(s):  
D. Sateesh Kumar ◽  
N. Vedavathi ◽  
G. Balaji Prakash ◽  
V. Sitamahalakshmi ◽  
K. K. Viswanathan

2015 ◽  
Vol 29 (21) ◽  
pp. 1550151 ◽  
Author(s):  
F. M. Abbasi ◽  
T. Hayat ◽  
F. Alsaadi

This paper addresses the effects of applied magnetic field and partial slip effects in peristalsis of water-based nanofluids in an asymmetric flow configuration. Analysis is carried out using silver and copper nanoparticles. Viscous dissipation, mixed convection, Ohmic heating and heat generation/absorption are considered. Mathematical modeling is done employing lubrication approximations. Resulting coupled system is solved numerically. Physical quantities like axial velocity, pressure gradient, temperature and heat transfer rate are graphically analyzed. Comparison between the silver–water and copper–water nanofluids is presented and analyzed. Results show that the maximum velocity, temperature and heat transfer rate at the wall in silver–water nanofluid are comparatively greater than that of copper–water nanofluid. It is also observed that addition of nanoparticles results in a decrease in the velocity and temperature of fluid. However, the heat transfer rate at the wall is enhanced through addition of nanoparticles.


2019 ◽  
Vol 48 (5) ◽  
pp. 1575-1594 ◽  
Author(s):  
Debi Prasad Bhatta ◽  
Satya Ranjan Mishra ◽  
Jayanta Kumar Dash

Author(s):  
Shu-Ye Lei

The permeability of narrow screened washed sands of granularity 100–450 μm was measured experimentally using water and air to investigate the effect of slip on the gas based permeability. The experimental data show that the air based permeability of the unconsolidated particle media is not proportional to the square of the mean particle diameter and that slip significantly affects the air based permeability measurements for unconsolidated porous media. The velocity slip effect is significant even for Kn<10−3. Slip effects were not found in the water based permeability measurements with the same sand samples. All of the experimental data lay around the curve k/d=0.283φ2.67 within ± 4.1%. However, the water based permeability was not below all of the air based permeability as expected. The air based permeability eliminated slip effects was about 59 % lower than that water based one, much larger than possible measurement. The experimental results showed that the standard air viscosity value in the handbooks was not its actual, the actual air viscosity may be over twice of that in handbooks.


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