Abstract: A device for generating special turbulence patterns in fluids flowing in pipes, such as for mixing, promoting chemical reactions, or accelerating the transfer of heat to or from the fluid through the pipe wall. Two or more sets of flow dividers are mounted in the pipe, each set including a first and second flow divider with septum panel elements that overlap longitudinally of the pipe. The first flow divider septum elements mutually diverge downstream in a selected longitudinal plane in longitudinally overlapping relationship with septum elements of the second flow divider mutually diverging upstream in a different longitudinal plane so as to divert the fluid in such manner that the flow regions adjoining the pipe wall are caused to exchange positions with flow regions in the vicinity of the pipe axis.