View Model     Problem Statement

PRODUCT: AFT Fathom

TITLE: FthVerify20.fth

REFERENCE: Igor Karassik, William Krutzsch, Warren Fraser, Joseph Messina, Pump Handbook, 2nd Ed., 1986, McGraw-Hill, Page 8.38, Example 8

FLUID: Water at 60 deg. F

ASSUMPTIONS: N/A

RESULTS:

Parameter	Handbook	AFT Fathom
Head loss (feet)	1.97	1.937

DISCUSSION:

The handbook uses a chart to obtain the Reynolds number of 1.8x10^6 and friction factor of 0.013. AFT Fathom solves for the Reynolds number and uses a more accurate correlation based on Colebrook-White to obtain a friction factor of 0.1277, which is 2% lower. 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 Reynolds number and friction factor.

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