Verification Case 71
PRODUCT: AFT Fathom (with SSL Module)
TITLE: FthVerify71.fth
REFERENCE: Wilson, Addie, Sellgren & Clift, Slurry Transport Using Centrifugal Pumps 3rd Edition, 2006, Publisher Springer, Page 148-149, Case Study 6.2
FLUID: Water/Coal
ASSUMPTIONS: The water temperature is not specified. It was assumed to be 20 deg. C because the viscosity ratio in equation 6.11 in the reference is based on the viscosity at 20 deg. C. The pipe length and inlet pressure were not given. They were assumed to be 100 m and 5 bar, respectively. The choice of pipe length and inlet pressure does not affect the resulting calculations. The calculation was run once to determine the mass flow rate of 1857 m-ton/hr at the minimum Im, then run again with the flow set to this value. In this way, the proper value of SEC was determined for the calculation. Also, while AFT Fathom calculates the expected value of 1.94 m/s for the Settling Velocity, the example in the reference uses a value of 1.90 m/s, so this value was used for the calculations in AFT Fathom as well. Assume M = 1.7.
RESULTS:
|
|
V50 (meters/sec) | Velocity at min Im (meters/sec) | Im (m/m) | SEC (kW-hr/mton-km) |
| Wilson, Addie, Sellgren & Clift | 2.64 | 3.1 | 0.0313 | 0.244 |
| AFT Fathom | 2.65 | 3.1 | 0.0313 | 0.244 |
DISCUSSION:
The results from AFT Fathom match the results from Wilson, Addie, Sellgren, and Clift exactly.
Note this model uses fluid properties from the AFT Standard fluid library. The AFT Standard fluid library was updated in AFT Fathom 12, thus the AFT Fathom results will be slightly different for this verification case when compared to previous versions of AFT Fathom.
