Shape classifier, physical meaning

Texture. Foam texture is an important parameter that affects the rheology of the foam fluid. Texture of a foam is a means of classifying a foam according to its bubble size, shape, and distribution within the foam matrix. Texture is a description of the manner in which the gas bubbles are distributed throughout the liquid phase of the foam. This property not only influences the foam s rheology but also its fluid loss, proppant transport, and cleanup properties. The texture of a foam is a qualitative rather than a quantitative value, and therefore a number cannot be used to describe it a physical description will be used. Factors that effect the texture of foams are quality, pressure, foam generating technique, and chemical composition. 

In 1977 another expression rolls machine known as the Elephant emerged. This adopted a new ceramic extrusion method utilizing electrophoresis following the Elephant principle. It cannot be formally classified as an extruder, rather being a machine for shaping by means of precipitating slurry in an electric field (electrophoresis) , yet the unusual features of this special process do in fact fulfil the requirements of column extrusion. The process could also be termed the extrusion of slurry The physical phenomenon of electrophoresis has been known since the 19 century, when Reuss discovered that particles suspended in water... 

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