Rheology of un-sieved concentrated domestic slurry
| Autor: | Jules B. van Lier, Adithya Krishnan Thota Radhakrishnan, Francois Clemens |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:Hydraulic engineering
Materials science Rheometer 0208 environmental biotechnology Geography Planning and Development 02 engineering and technology Aquatic Science Biochemistry Tikhonov regularization concentration influence lcsh:Water supply for domestic and industrial purposes Rheology lcsh:TC1-978 Couette inverse problem Composite material concentrated domestic slurry Water Science and Technology Total suspended solids lcsh:TD201-500 020801 environmental engineering Shear rate Particle-size distribution Slurry un-sieved slurry rheology Wide gap |
| Zdroj: | Water, Vol 10, Iss 10, p 1287 (2018) Water Volume 10 Issue 10 Water, 10(10) |
| ISSN: | 2073-4441 |
| Popis: | Information on the rheology of domestic slurries is essential in designing pipeline transportation in novel sanitation systems. As concentrated slurries in their original collected state have wide particle size distribution, with particles up to 2 mm, a wide gap rheometer is used to acquire the rheograms. Rheograms obtained from a wide gap rheometer require a method to convert the rotational velocity to the shear rate, and this method must be robust to noisy data and yield stress in the slurry. For this purpose, a Tikhonov regularisation method is chosen as it suits the criteria the best. Using this, the rheograms are obtained for various total suspended solids (TSS) concentrations of slurries. A Herschel-Bulkley rheological model is used to represent the rheology of the slurries. The influence of the change in concentration of the slurries is represented through its influence on the Herschel-Bulkley parameters. The consistency index K exponentially increases with the concentration. The yield stress &tau y , is 0 at low concentrations, and above 2.0% TSS (wt./wt.) exponentially increases with the concentration. The behaviour index n , is 1 at low concentrations, and above 2.6% TSS (wt./wt.) it decreases in an inverse power law with the concentration to reach a sort of plateau. |
| Databáze: | OpenAIRE |
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