By observing the changing values of void fraction and {HEAD ~ liquid density}, an operator may observe effects of {TAIL ~ transient or abrupt changes} in the fluid flow 
By observing the changing values of void fraction and { HEAD ~ liquid density } , an operator may observe effects of { TAIL ~ transient or abrupt changes } in the fluid flow
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH