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