Verification Case 19
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.
