Verification Case 34
PRODUCT: AFT Fathom
TITLE: FthVerify34.fth
REFERENCE: Crane Co., Flow of Fluids Through Valves, Fittings, and Pipe, Technical Paper No. 410, Crane Co., Joliet, IL, 1988, Page 4-7, Example 4-13
FLUID: Fuel Oil
ASSUMPTIONS: Inlet pressure is 2 bars
RESULTS:
| Parameter | Crane | AFT Fathom |
| Head loss (meters) | 8.95 | 8.91 |
| Pressure drop (kg/cm2) | 0.729 | 0.7262 |
| Pressure drop (bar) | 0.715 | 0.7121 |
| Pressure drop (MPa) | 0.0715 | 0.07121 |
DISCUSSION:
The viscosity is given as kinematic. Converting to dynamic viscosity yields 2.20E-03 kg/m-s.
The head loss in AFT Fathom can be found in three places. First, it is given in the pipe output table. Second, it can be obtained by subtracting the discharge EGL from the supply. Third, it can be viewed in the Junction Deltas summary at the top of the Output window. The junction delta was setup in the Output Control window.
The pressure loss in AFT Fathom can be found in the same three places. Note that three junction deltas are setup for pressure, with different units for each. This allows a more straightforward comparison with the Crane results.
