Verification Case 41
PRODUCT: AFT Fathom
TITLE: FthVerify41.fth
REFERENCE: Robert W. Fox and Alan T. McDonald, Introduction to Fluid Mechanics, 3rd Ed., 1985, John Wiley & Sons, Page 385-389, example 8.11
FLUID: Water at 60 deg. F
ASSUMPTIONS: N/A
RESULTS:
| Parameter | Fox & McDonald | AFT Fathom |
| Flow rate to Branch 1 (gal/min) | 493 | 493.48 |
| Flow rate to Branch 2 (gal/min) | 557 | 557.44 |
| Flow rate to Branch 3 (gal/min) | 449 | 449.09 |
| Pressure at inlet (psig) | 91.2 | 91.52 |
DISCUSSION:
Fox and McDonald use equivalent lengths to model the elbows. These were converted to K factors of 0.4 in AFT Fathom. The loss factors at the three sprays (modeled as assigned pressure junctions) were specified as 16. This allows for the area ratio of 2 to the 4th power to account for the energy lost at the discharge.
