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