scholarly journals On degenerate coupled transport processes in porous media with memory phenomena

2018 ◽  
Vol 98 (6) ◽  
pp. 919-944 ◽  
Author(s):  
Michal Beneš ◽  
Igor Pažanin
Keyword(s):  
Porous Media ◽  
Transport Processes ◽  
Coupled Transport ◽  
Coupled Transport Processes ◽  
With Memory

Surface changes of temperature and matter due to coupled transport processes through porous media

2004 ◽  
Vol 37 (4) ◽  
pp. 1193-1202 ◽  
Author(s):  
I Kirschner ◽  
Cs Mészáros ◽  
Á Bálint ◽  
K Gottschalk ◽  
I Farkas
Keyword(s):  
Porous Media ◽  
Transport Processes ◽  
Coupled Transport ◽  
Coupled Transport Processes ◽  
Surface Changes

scholarly journals Thermodynamically Coupled Mass Transport Processes in a Saturated Clay

1984 ◽  
Vol 44 ◽  
Author(s):  
C. L. Carnahan
Keyword(s):  
Mass Transport ◽  
Solute Concentration ◽  
Transport Processes ◽  
Fluid Composition ◽  
Coupled Transport ◽  
Chemical Osmosis ◽  
Saturated Clay ◽  
Specific Discharge ◽  
Coupled Transport Processes ◽  
Waste Repositories

AbstractGradients of temperature, pressure, and fluid composition in saturated clays give rise to coupled transport processes (thermal and chemical osmosis, thermal diffusion, ultrafiltration) in addition to the direct processes (advection and diffusion). One-dimensional transport of water and a solute in a saturated clay subjected to mild gradients of temperature and pressure was simulated numerically. When full coupling was accounted for, volume flux (specific discharge) was controlled by thermal osmosis and chemical osmosis. The two coupled fluxes were oppositely directed, producing a point of stagnation within the clay column. Solute flows were dominated by diffusion, chemical osmosis, and thermal osmosis. Chemical osmosis produced a significant flux of solute directed against the gradient of solute concentration; this effect reduced solute concentrations relative to the case without coupling. Predictions of mass transport in clays at nuclear waste repositories could be significantly in error if coupled transport processes are not accounted for.

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