View Model     Problem Statement

PRODUCT: AFT Fathom

TITLE: FthVerify19.fth

REFERENCE: Igor Karassik, William Krutzsch, Warren Fraser, Joseph Messina, Pump Handbook, 2nd Ed., 1986, McGraw-Hill, Page 8.35-37, Example 6

FLUID: Water at 109 deg. F

ASSUMPTIONS: N/A

RESULTS:

Parameter	Handbook	AFT Fathom
Head loss (feet)	1.82	1.874

DISCUSSION:

The handbook uses a chart to obtain the friction factor of 0.012. AFT Fathom uses a more accurate correlation based on Colebrook-White to obtain a friction factor of 0.1235, which is 3% higher. This is the reason the AFT Fathom head loss calculation differs slightly from the handbook. The AFT Fathom calculation is more accurate because of the higher accuracy friction factor.

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