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Drop pressure - divergence in analytic calculus

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Old   May 3, 2017, 12:07
Default Drop pressure - divergence in analytic calculus
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Rodrigo Raggiotti
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Precious sirs, good days!

I have a question about drop pressure in fluent.
I made a simulation with two nozzles with characteristcs:
- D.I. 203mm x 560mm length;
- D.I. 102mm x 560mm length;

The drop pressure data and inlet data are attached.

The question is:
These drop pressure results are incoherent with general equation of drop pressure:

hf=(f*l&w^2)/(2*g*D)
hf=89.6 Pa (D.I. 203mm)

And are incoherent with equation according to VDI Heat Atlas, p. 1057.
p=77 Pa (D.I. 203mm)

Can anyone help me in this question?
Attached Files
File Type: txt drop-pressure - bicos individuais.txt (536 Bytes, 0 views)
File Type: txt report-b.txt (6.6 KB, 0 views)

Last edited by raggiotti; May 3, 2017 at 12:10. Reason: Forgot the attachments
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