scholarly journals HESS Opinions: Unsaturated infiltration – the need for a reconsideration of historical misconceptions

2021 ◽  
Vol 25 (2) ◽  
pp. 1097-1101
Author(s):  
Peter F. Germann
Keyword(s):  
Preferential Flow ◽  
Film Flow ◽  
Capillary Flow ◽  
Equilibrium Flow ◽  
Macropore Flow ◽  
Viscous Film ◽  
Viscous Film Flow ◽  
Alternative Approach ◽  
Non Equilibrium

Abstract. Briggs (1897) deduced capillary flow from deviation of the equilibrium between capillarity and gravity. Richards (1931) raised capillary flow to an unproven soil hydrological dogma. Attempts to correct the dogma led to concepts of non-equilibrium flow, macropore flow, and preferential flow during infiltration. Viscous film flow is proposed as an alternative approach to capillarity-driven flow during unsaturated infiltration.

scholarly journals HESS Opinions: Unsaturated infiltration: from unproven capillary flow to viscous flow

2020 ◽  
Author(s):  
Peter Germann
Keyword(s):  
Viscous Flow ◽  
Preferential Flow ◽  
Capillary Flow ◽  
Equilibrium Flow ◽  
Macropore Flow ◽  
Non Equilibrium

Abstract. Briggs (1897) deduced capillary flow from deviation of the equilibrium between capillarity and gravity. Richards (1931) raised capillary flow to an unproven soil hydrological dogma. Apparent corrections of the dogma led to non-equilibrium flow, macropore flow, and preferential flow during infiltration. Viscous flow is proposed as alternative to capillary flow during unsaturated infiltration.

Non-linear waves in electrified viscous film flow down a vertical cylinder

2012 ◽  
Vol 77 (3) ◽  
pp. 430-440 ◽  
Author(s):  
A. W. Wray ◽  
O. Matar ◽  
D. T. Papageorgiou
Keyword(s):  
Film Flow ◽  
Vertical Cylinder ◽  
Viscous Film ◽  
Viscous Film Flow ◽  
Linear Waves ◽  
Non Linear

scholarly journals Resonance in viscous film flow over topography

PAMM ◽  
2007 ◽  
Vol 7 (1) ◽  
pp. 3020001-3020002
Author(s):  
Christian Heining ◽  
Andreas Wierschem ◽  
Vasilis Bontozoglou ◽  
Nuri Aksel ◽  
Hannes Uecker
Keyword(s):  
Film Flow ◽  
Viscous Film ◽  
Viscous Film Flow ◽  
Flow Over Topography

Viscous film flow in the stagnation region of the jet impinging on planar surface

AIChE Journal ◽  
1994 ◽  
Vol 40 (10) ◽  
pp. 1611-1617 ◽  
Author(s):  
Andrew Yeckel ◽  
Lisa Strong ◽  
Stanley Middleman
Keyword(s):  
Film Flow ◽  
Planar Surface ◽  
Stagnation Region ◽  
Viscous Film ◽  
Viscous Film Flow

scholarly journals Resonance in viscous film flow over topography

PAMM ◽  
2007 ◽  
Vol 7 (1) ◽  
pp. 4100025-4100026
Author(s):  
Christian Heining ◽  
Andreas Wierschem ◽  
Vasilis Bontozoglou ◽  
Nuri Aksel ◽  
Hannes Uecker
Keyword(s):  
Film Flow ◽  
Viscous Film ◽  
Viscous Film Flow ◽  
Flow Over Topography
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