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Old   October 22, 2013, 05:34
Default calculation problem
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Ahmad jibreel
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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
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Old   October 23, 2013, 06:08
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vidyanand
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how did you got this 20000Pa ,is it pressure drop or gauge pressure or absolute pressure?
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Old   November 7, 2013, 07:54
Default calculation problem
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Ahmad jibreel
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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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