Reboundtukkoisuus

Reboundtukkoisuus refers to a phenomenon where a material, particularly a porous one like certain types of insulation or filters, experiences a temporary increase in its resistance to fluid flow after a period of operation. This increase is typically observed after the material has been exposed to a fluid and then allowed to dry or rest. The term combines "rebound," suggesting a return to a higher state, and "tukkoisuus," the Finnish word for blockage or clogging.

The underlying mechanism of reboundtukkoisuus is not fully understood and can vary depending on the material and the fluid involved. One proposed explanation involves changes in pore structure. When a porous material is wetted, the liquid can fill the pores and potentially cause some slight deformation or rearrangement of the material's structure. Upon drying, these pores may not return to their original, open state, leading to a reduced effective pore size and thus increased flow resistance. Another factor could be the interaction of fluid components with the material surface, leading to a temporary increase in adhesion or surface tension effects that impede flow.

This phenomenon is most relevant in applications where materials are cycled through wetting and drying phases, such as in certain types of air filters, water purification systems, or even in natural porous media like soils. Understanding and mitigating reboundtukkoisuus is important for ensuring consistent performance and longevity of these materials in their intended applications. Research in this area focuses on material science, fluid dynamics, and the properties of porous media.