Foam fractionation is a well-developed technology used to separate surface-active
compounds from solution by exploiting their affinity for the air–water interface. The …

Aqueous foams are complex fluids composed of gas bubbles tightly packed in a surfactant
solution. Even though they generally consist only of Newtonian fluids, foam flow obeys …

A systemized version of the tanh method is used to solve particular evolution and wave
equations. If one deals with conservative systems, one seeks travelling wave solutions in the …

This review covers recent advances in the study of foam drainage and coarsening, focusing
especially on the effective role of the foam chemical components on those aging processes …

The tanh (or hyperbolic tangent) method is a powerful technique to search for travelling
waves coming out from one-dimensional nonlinear wave and evolution equations. In …

This monograph has grown out of research we started in 1987, although the foun dations
were laid in the 1970's when both of us were working on our doctoral theses, trying to …

The drainage of liquid in a foam may be described in terms of a nonlinear partial differential
equation for the foam density as a function of time and vertical position. We review the …

The word foam may be applied to any material whose structure consists of cells, but in this
chapter it may be taken to mean the familiar soap froth, or any of the many liquid-gas …

A generalization of the Korteweg-de Vries equation (KdVE) is considered in which additional
terms belonging to the Kuramoto-Sivashinsky equation (KSE) are incorporated to account …

Both liquid and solid foams, together with analogous cellular materials, have distinctive
mechanical or rheological properties which find many applications. This review concentrates …