each element thereby providing a number of adjacent pointwise boundary layer interruptions corresponding to {HEAD ~ the number} of {TAIL ~ blade} like members thereof, 
of
each element thereby providing a number of adjacent pointwise boundary layer interruptions corresponding to { HEAD ~ the number } of { TAIL ~ blade } like members thereof ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH