{TAIL ~ The spiral flow} increases {HEAD ~ the rate} of convection and thus increases the cooling capacity of the cooling system 
{ TAIL ~ The spiral flow } increases { HEAD ~ the rate } of convection and thus increases the cooling capacity of the cooling system
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH