Volume 124, Number 6, December 2018
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||08 January 2019|
Effect of anti-Langmuir adsorption on spreading in porous media
1 Université libre de Bruxelles (ULB), Nonlinear Physical Chemistry Unit - 1050 Brussels, Belgium
2 Department of Mathematics, Indian Institute of Technology Ropar - Rupnagar-140001, Punjab, India
3 Department of Chemical Engineering, Indian Institute of Technology Ropar - Rupnagar-140001, Punjab, India
Received: 11 August 2018
Accepted: 13 December 2018
When given solutes are transported in porous media flows, various propagation regimes can be observed depending on the adsorption isotherms. We perform numerical simulations to investigate the influence of an anti-Langmuir adsorption isotherm (overloading isotherm) on the spreading of a miscible solute-rich slice in a porous medium. Selecting the characteristic scaling of the solute concentration appropriately, the dynamics of the anti-Langmuir adsorbed solute is studied in the pure diffusion-convection conditions as well as under the influence of viscous fingering. The similarities and differences between the spreading of Langmuir and anti-Langmuir adsorbed miscible slices are analysed as a function of the parameters of the problem.
PACS: 47.35.-i – Hydrodynamic waves / 47.20.Gv – Viscous and viscoelastic instabilities / 47.10.A- – Mathematical formulations
© EPLA, 2019
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