Verification Case 6

View Model     Problem Statement

PRODUCT: AFT Fathom

TITLE: FthVerify6.fth

REFERENCE: Ernest Brater, Horace Williams, James Lindell, C.Y. Wei, Handbook of Hydraulics, 7th Ed., 1996, McGraw-Hill, Page 6.30, Example 6.1a

FLUID: Water

ASSUMPTIONS: N/A

RESULTS:

Parameter	Handbook	AFT Fathom
Head loss (meters)	1.53	1.614

DISCUSSION:

The velocity and diameter are specified. For use in AFT Fathom, this is converted to a flow rate, obtaining 0.5655 m3/s.

The answers differ slightly because the handbook authors read the friction factor (0.015) off of a chart, whereas AFT Fathom solves for the friction factor using the Colebrook-White equation (obtaining 0.01583, 5.5% higher).

If the pipe is modeled as an explicit friction factor at 0.015, the exact same answer as the handbook is obtained.

No pressure boundary conditions are specified. In determining pressure drop, the boundary pressure plays no role. Therefore any value is suitable. The model assumes 1 MPa at the inlet.

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