{HEAD ~ The apparatus} is provided with an interrupter structure for disrupting {TAIL ~ the fluid boundary layers} at the walls of the apparatus and promoting mixing of the separated boundary layers with the adjacent core layers 
{ HEAD ~ The apparatus } is provided with an interrupter structure for disrupting { TAIL ~ the fluid boundary layers } at the walls of the apparatus and promoting mixing of the separated boundary layers with the adjacent core layers
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH