FluidFlow provides multiple methods for modeling slurry systems in inclined pipes. While the WASC (Wilson-Addie-Sellgren-Clift) method is recommended as it inherently accounts for pipe inclination, users can also apply inclination correction factors when using the Durand method.
For angles between -20 and 80 degrees, FluidFlow allows application of inclination corrections. Outside this range, the software applies the Worster & Denny method, modified to account for solids effects in vertical pipes.
For detailed information on slurry transport in inclined pipes, refer to "Slurry Transport Using Centrifugal Pumps" by Wilson, Addie, Sellgren, and Clift.