At {TAIL ~ the temperatures} and pressures used in coal liquefaction preheaters the coal oil slurry and hydrogen containing {HEAD ~ gas stream} behaves essentially as a Newtonian fluid at shear rates in excess of 150 sec.sup 
At { TAIL ~ the temperatures } and pressures used in coal liquefaction preheaters the coal oil slurry and hydrogen containing { HEAD ~ gas stream } behaves essentially as a Newtonian fluid at shear rates in excess of 150 sec.sup
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH 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