# calculation problem

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 October 22, 2013, 05:34 calculation problem #1 New Member   Ahmad jibreel Join Date: Oct 2013 Posts: 6 Rep Power: 3 i analyze a flow passage. but the problem is energy at the outel comes greater then energy at inlet please tell me what to do. i gave parameters as velocity inlet 3m/s pressure outlet 20000pa value of inlet pressure calculated is too small that it cannot satisify the bernulli equation. plz help me

 October 23, 2013, 06:08 #2 Member   vidyanand Join Date: Nov 2011 Location: bangalore,india Posts: 66 Rep Power: 8 how did you got this 20000Pa ,is it pressure drop or gauge pressure or absolute pressure?

 November 7, 2013, 07:54 calculation problem #3 New Member   Ahmad jibreel Join Date: Oct 2013 Posts: 6 Rep Power: 3 Actually i want to calculate the energy loss in half symmetic nozzle with a half sphere inserted in flow to produce restriction inlet condtions Din=16m Vin=3m/s Outlet condtion Dout= 6.5m Pressure out=20000pa (just a guess just to see what will be the value of inlet pressure for this outlet pressue but i think is whould be large enough to satisify the conservation of momentum.) i got following results at cerntral axis Vout=18m/s Pressure inlet=186900Pa Plz tell me how to calculate the energy loss due to (friction, flow recirculation etc.)

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