Mass transfer of a neutral solute in polyelectrolyte grafted soft nanochannel with porous wall

2020 ◽  
Vol 41 (7-8) ◽  
pp. 578-587
Author(s):  
Debashis Roy ◽  
Saikat Bhattacharjee ◽  
Sirshendu De
2015 ◽  
Vol 10 (3) ◽  
pp. 31-40
Author(s):  
Sergey Gaponov ◽  
Natalya Terekhova

This work continues the research on modeling the management regime in the boundary layer of compressible gas. The effect of the distribution of heat and mass transfer on the stability characteristics of supersonic boundary layer at high supersonic Mach number M = 5,35. The focus is on the modeling of acoustic disturbances in the conditions as a normal injection, in which the only nonzero component of the average velocity V, and the injection of other areas, including tangential, when the wall is not zero only U component. Production close to the problem of influence on the development of gas curtain small oscillations. It is assumed that the effect of injection of a homogeneous gas of different temperature similar to that of the blowing gas of different density, namely, blowing cold gas simulates heavy gas blowing and vice versa. Therefore in this modeling work is achieved by changing the factor of temperature (heating or cooling of the walls). The variant when the socalled regime implemented «lock» when the velocity perturbations on the porous surface can be taken as zero.


1984 ◽  
Vol 131 (8) ◽  
pp. 1828-1831 ◽  
Author(s):  
Philip Lessner ◽  
John Newman
Keyword(s):  

2019 ◽  
pp. 460-460 ◽  
Author(s):  
Hamida Ben ◽  
Mohamed Massoudi ◽  
Riadh Marzouki ◽  
Lioua Kolsi ◽  
Mohammed Almeshaal ◽  
...  

The steady mixed convection of heat and mass transfer inside and outside a porous vertical wall is numerically studied. The porous wall, placed in a vertical channel, contains a solid phase, a nanofluid phase (Water-Al2O3 or Water-Cu) and gas phase. The effect of several physical quantities such as nanoparticle volume fraction, ambient temperature and initial nanofluid saturation on heat and mass transfer were investigated. Results reveal that the temperature of porous medium is decreased considerably with nanoparticle volume fraction. It has been also found that the heat and mass transfer are dramatically reduced using Water-Alumina nanofluid when compared with pure water.


2005 ◽  
Vol 51 (6-7) ◽  
pp. 69-76 ◽  
Author(s):  
S.R. Smith ◽  
T. Taha ◽  
Z.F. Cui

Tubular membrane ultrafiltration and microfiltration are important industrial separation and concentration processes. Process optimisation requires reduction of membrane build-up. Gas slug introduction has been shown to be a useful approach for flux enhancement. However, process quantification is required for design and optimisation. In this work we employ a non-porous wall CFD model to quantify hydrodynamics in the two-phase slug flow process. Mass transfer is subsequently quantified from wall shear stress, which was determined from the CFD. The mass transfer model is an improved one-dimensional boundary layer model, which empirically incorporates effects of wall suction and analytically includes edge effects for circular conduits. Predicted shear stress profiles are in agreement with experimental results and flux estimates prove more reliable than that from previous models. Previous models ignored suction effects and employed less rigorous fluid property inclusion, which ultimately led to under-predictive flux estimates. The presented model offers reliable process design and optimisation criteria for gas-sparged tubular membrane ultrafiltration.


2001 ◽  
Vol 17 (3) ◽  
pp. 245-250 ◽  
Author(s):  
A. F. Polyakov ◽  
D. L. Reviznikov ◽  
Shen Qing ◽  
Tang Jinrong ◽  
Wei Shuru

1973 ◽  
Vol 16 (2) ◽  
pp. 525-526 ◽  
Author(s):  
Mahendra R. Doshi ◽  
R. Sankarasubramanian ◽  
William N. Gill

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