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