The upstream volume 66 is in direct fluid communication with the coolant inlet 40, and {HEAD ~ the downstream volume} 68 is in {TAIL ~ direct fluid communication} with the coolant outlet 42 
is in
The upstream volume 66 is in direct fluid communication with the coolant inlet 40 , and { HEAD ~ the downstream volume } 68 is in { TAIL ~ direct fluid communication } with the coolant outlet 42
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH