The melting of unsaturated capillary condensate

Langmuir ◽  
1993 ◽  
Vol 9 (4) ◽  
pp. 1040-1045 ◽  
Author(s):  
Mark Lysek ◽  
Marissa LaMadrid ◽  
Peter Day ◽  
David Goodstein
Keyword(s):  
Capillary Condensate

Transport of capillary condensate

1975 ◽  
Vol 52 (1) ◽  
pp. 174-181 ◽  
Author(s):  
Hannong Rhim ◽  
Sun-tak Hwang
Keyword(s):  
Capillary Condensate

Effect of capillary condensate of methane on electrophysical and strength properties of coal

1992 ◽  
Vol 28 (3) ◽  
pp. 231-234
Author(s):  
A. V. Astakhov ◽  
S. P. Khazov ◽  
L. N. �konomova
Keyword(s):  
Strength Properties ◽  
Capillary Condensate

Diffusion and flow of gases and vapours through micropores IV. Flow of capillary condensate

1952 ◽  
Vol 211 (1107) ◽  
pp. 526-535 ◽  
Keyword(s):  
Pressure Difference ◽  
Capillary Condensation ◽  
Pore Space ◽  
Degree Of Saturation ◽  
Porous Plug ◽  
Bulk Liquid ◽  
Adsorbed Films ◽  
Adsorbed Gas ◽  
Mean Pressure ◽  
Capillary Condensate

If capillary condensation occurs in a porous plug and a steady pressure difference of an adsorbed gas is maintained across the plug, capillary condensate behaves as if it were bulk liquid in viscous flow through the pore-space. The driving force producing flow is not the pressure difference of the gas, but a very much larger difference of capillary pressure resulting from this pressure difference, presumably due to action of surface tension at curved menisci in the pores. The mechanism contrasts sharply with flow in adsorbed films, which has earlier been shown to conform to a process of surface diffusion. In a saturated plug, observed permeabilities agree very well with calculated values, assuming capillary condensate has the viscosity and density of bulk liquid. Apart from confirming the mechanism of flow, this suggests that liquid properties are not much altered in capillaries of radii down to at least 20 Å. At a given mean pressure of gaseous adsorbate, the permeability has a very different value if the pressure is approached by desorption from a saturated plug from that when the pressure is approached by adsorption from a degassed plug. This is because, due to adsorption hysteresis, the saturation of the plug is different in the two experiments. For a given degree of saturation, the permeability is the same in both adsorption and desorption runs.

Liquid Mediated Adhesion of Ultra-Flat Solid Surfaces

1988 ◽  
Vol 119 ◽  
Author(s):  
M. J. Matthewson ◽  
H. J. Mamin
Keyword(s):  
Surface Roughness ◽  
Liquid Film ◽  
Tangential Direction ◽  
Solid Surfaces ◽  
Loading Conditions ◽  
Flat Surfaces ◽  
Separation Rate ◽  
Capillary Condensate

AbstractThe presence of a liquid film between contacting ultra-flat surfaces can produce high levels of adhesion. The liquid film may be a pre-existing film of lubricant or may be a capillary condensate. This paper considers the meniscus and viscous components to the adhesion. Different regimes are identified which are distinguished by differing quantities of liquid in the gap between the surfaces. The role of surface roughness is also evaluated. The force required to separate the surfaces in the tangential direction is considered. The magnitude of this force is dependent not only on the adhesion but also on the separation rate and loading conditions.

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