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Miscible Displacement: III. Theoretical Considerations¹

ABSTRACT

Several theoretical models are examined as to their usefulness in describing miscible displacement in porous materials. These descriptions are discussed for glass beads, sieved aggregates and soils at several water contents and for several flow velocities. It is shown that mathematical descriptions which do not include individual mechanisms are unsatisfactory. The mechanisms that must be considered are discussed with specific reference to experimental data.

¹ Contribution from the Department of Irrigation, University of California, Davis.

² Assistant Professor and Assistant Irrigationist, respectively.

Received for publication July 8, 1961. Accepted for publication October 13, 1961.