Verification Case 3
PRODUCT: AFT Fathom
TITLE: FthVerify3.fth
REFERENCE: D.S. Miller, Internal Flow Systems, 2nd Ed., 1990, Gulf Publishing Co., Page 28-29
FLUID: Water
ASSUMPTIONS: Size pump for given flow
RESULTS:
| Parameter | Miller | AFT Fathom |
| System head loss (meters) | 21.6 | 21.51 |
| Required pump head rise (meters) | 28.6 | 28.51 |
| Requred pump pressure rise (bar) | 2.8 | 2.796 |
DISCUSSION:
The reflux valve K value of 0.5 was lumped into pipe 2 as a fitting and loss value.
The overall system head loss in AFT Fathom is obtained by subtracting the discharge EGL (1.5 m) from the supply EGL (8.5 m), then subtracting this difference from the pump head rise (28.51 m).
The pump head rise and pressure rise in AFT Fathom is given in the pump summary at the top of the Output window, and also in the junction output table in the lower part of the window.
There is some slight disagreement with Miller due to round-off errors.
