NETWORK MODELS FOR TWO-PHASE FLOW IN POROUS MEDIA: PART 2; MOTION OF OIL GANGLIA.

• Tipo: Artigo em Revista Científica Internacional
• Data: 1986

Autores

Dias Madalena, M (Autor) FEUP; Payatakes Alkiviades, C (Autor) Outra

Revista

Título: Journal of Fluid Mechanics

Vol. 164

Páginas: 337-358

ISSN: 0022-1120

Editora: Cambridge University Press

Indexação

ISI Web of Knowledge

Scopus - 90 Citações

Outras Informações

ID Authenticus: P-008-P4H

Abstract (EN): The behaviour of non-wetting ganglia undergoing immiscible displacement in a porous medium is studied with the help of a theoretical simulator. The porous medium is represented by a network of randomly sized unit cells of the constricted-tube type. The fluid of a non-wetting ganglion is in contact with the wetting fluid at menisci which are assumed to be spherical cups. The flow in every constricted unit cell occupied by a single fluid is modelled as flow in a sinusoidal tube. The flow in every unit cell that contains a meniscus and portions of both fluids is treated with a combination of a Washburn-type analysis and a lubrication-theory approximation. The flow problem is thus reduced to a system of linear equations the solution of which gives the instantaneous pressures on the nodes, the flowrates through the unit cells, and the velocities of the menisci. The dependence of the average ganglion velocity on ganglion size, capillary number, viscosity ratio and dynamic contact angle is examined for the simple case of motion between straight rows of spheres.

Idioma: Inglês

Tipo (Avaliação Docente): Científica