Abstract: A device for distributing flowing media over a flow cross section comprising a distributor plate extending over the flow cross section and having a multiplicity of openings over its entire extent. The device further includes a cover plate having passages distributed over its entire extent and movably arranged relative to the distributor so as to be able to determine the free passage cross section of all the openings of the distributor plate. The device can be arranged advantageously, at the input of a reaction chamber with a catalytic charge, in order to distribute the reactants over the cross section of the catalytic chamber.

Abstract: A static mixer for flowing media is disclosed. More specifically, the mixer comprises a tubular enclosure and guide surfaces which are in the form of multiple-thread screw surfaces which are alternatingly interrupted, overlap each other and extend to and are concentric with the tubular enclosure. A mixer designed in this manner provides a thorough mixing of the flowing media within a short length of the enclosure. Moreover, with the present mixer, little pressure loss occurs and the flowing media is distributed uniformly over the exit cross section.

Abstract: Stationary liquid flow patterns at boundary surfaces are recorded by coating the boundary surface with a layer of lacquer which can be attacked and exposing the boundary surface to a flow of liquid containing a substance which attacks the lacquer layer. In accordance with the preferred embodiments a photo-resist lacquer is sprayed onto the surfaces and etching substance dissolved in a liquid which is caused to flow past the boundary surface making possible a visible recording of the formation of eddies at obstacles.