Titre du document / Document title

Force stability of pore-scale fluid bridges and ganglia in axisymmetric and non-axisymmetric configurations

Auteur(s) / Author(s)

NIVEN Robert K. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ School of Aerospace, Civil and Mechanical Engineering, The University of New South Wales at ADFA, Northcott Drive, Canberra, ACT, 2600, AUSTRALIE

Résumé / Abstract

The force stability of isolated zero-gravity fluid bodies (bridges and ganglia) in porous media, both axisymmetric and non-axisymmetric, is examined, with particular attention to the capillary repulsive force of Orr et al. [Orr, F.M., Scriven, L.E., Rivas, A.P., 1975a. Pendular rings between solids: meniscus properties and capillary force. J. Fluid Mech. 67 (4), 723-742.] and Rivas et al. [Rivas, A.P., Orr, F.M., Scriven, L.E., 1975. Capillary attraction and capillary repulsion. Lat. Am. J. Chem. Eng. Appl. Chem. 5 (1), 93-99.]. By consideration of the Young-Laplace solution set, force stability analyses and experiments, it is shown that fluid bridges and ganglia must adopt a geometry in which the net force exerted on their contacting solids is attractive or zero. Fluid bridges under repulsion - including axisymmetric (outer nodoid) and asymmetric ("pseudo-nodoid") forms - are mechanically unstable and not physically realized. The role of wettability is critical: non-wetting fluids tend to cause capillary repulsion rather than attraction. Non-wetting fluid ganglia are therefore subject to a maximum volume condition, defined by the zero-force geometry; for axisymmetric and periodically symmetric (i.e. symmetric by rotation) configurations this constitutes the zone of a sphere. The analysis provides an explanation for the observed pseudo-spherical forms of non-wetting fluid ganglia. A modified Haines in-sphere method is presented for calculating the volumes of isolated spherical ganglia, including the effect of contact angle. The periodically symmetric solution set to the Young-Laplace equation is also examined, by analogy with the axisymmetric case.

Revue / Journal Title

Journal of petroleum science & engineering   ISSN 0920-4105   CODEN JPSEE6 

Source / Source

Congrès
International Symposium on Reservoir Wettability N^o8, Houston, TX , ETATS-UNIS (16/05/2004)
2006, vol. 52, n^o 1-4 (331 p.)  [Document : 18 p.] (2 p.1/4), [Notes: Selected papers], pp. 1-18 [18 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Elsevier Science, Amsterdam, PAYS-BAS  (1987) (Revue)

Mots-clés anglais / English Keywords

Capillary pressure ; Contact angle ; Rotation ; Wettability ; Gravity ;

Mots-clés français / French Keywords

Pression capillaire ; Angle contact ; Rotation ; Mouillabilité ; Gravité ;

Mots-clés espagnols / Spanish Keywords

Presión capilar ; Angulo contacto ; Rotación ; Remojabilidad ; Gravedad ;

Mots-clés d'auteur / Author Keywords

Liquid bridge ; Meniscus ; Axisymmetric ; Non-axisymmetric ; Capillary pressure ; NAPL ; Ganglia ;

Localisation / Location

INIST-CNRS, Cote INIST : 21158, 35400014247739.0010