Negative absolute pressure -- CFD Online Discussion Forums

December 11, 2014, 08:04	Negative absolute pressure	#1
shahid nadeem Member Nazim Join Date: Oct 2013 Posts: 93 Rep Power: 12	Dear Friends, I Would Like to share my experience regarding negative pressure. i am solving a Perforated Pipe Distributor, the flow enters at atmospheric pressure and exits through the holes to the vaccum vessel maintained at 1 Pa. The inlet area is 1500 mm and at the outlet there are 16600 number of holes of 10 mm diameter each. After post processing i am getting a negative absolute pressure of -1358 Pa i am wondering how can there be a negative absolute pressure. WHether it is possible in vaccum conditions or is there any error in solving, if you have any idea please help me. The Gas is Incompressiblel air at 333 Inlet: 33.33 Kg/s Outlet 1 Pa

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