Head losses associated with slurry flows
Fragment książki (Rozdział w monografii)
MNiSW
20
Poziom I
| Status: | |
| Autorzy: | Singh Jashanpreet, Singh Jatinder Pal, Kumar Virinder, Szala Mirosław |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Strony: | 1 - 19 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Pumping solid–liquid mixtures through pipelines is widely adopted in industries due to its operational efficiency and environmental benefits. However, predicting head loss, primarily through pipe bends, remains a significant challenge due to the complex flow behaviour of multi-particulate suspensions. This chapter provides an in-depth review and experimental and numerical analyses focused on the head loss behaviour of coal, bottom ash, and fly ash slurries. A detailed analysis of existing experimental and computational studies highlights key gaps, notably the limited data on slurry flow through 90° bends, the lack of generalised predictive models, and the minimal exploration of additive effects on flow resistance. The experimental part of the study involved rheological characterisation and head loss measurement across different slurry concentrations, both with and without the inclusion of additives. The collected data facilitated the assessment of parameters such as settling velocity, bend loss coefficients, and specific energy consumption. The study was also analysed numerically with ANSYS-Fluent because of the confinements involved in pilot-scale studies. The Eulerian multiphase model coupled with the SST k-omega turbulence model was validated on experimental results, and this was subsequently applied in the study of the influence of different r/D on the hydraulic behaviour of pipeline bends. The study confirms that head loss increases with higher solid concentrations and flow velocities; however, it can be reduced by effectively applying bottom ash and suitable additives. Numerical simulations offer reliable design insights, enabling optimisation of pipe bend geometries for efficient slurry transport. This integrated approach addresses current gaps in the literature and provides a robust framework for industrial slurry pipeline design and analysis. |
