Because turbulence increases the rate of convection, the turbulent action created by the protrusions in the first row increases {HEAD ~ the rate} of {TAIL ~ convection} of the cooling system 
of
Because turbulence increases the rate of convection , the turbulent action created by the protrusions in the first row increases { HEAD ~ the rate } of { TAIL ~ convection } of the cooling system
OTH OTH OTH OTH OTH OTH 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