Abstract
The concentration of domestic slurry has two advantages, it promotes resource recovery (nutrients and biomass) and saves water. But the design of a relevant sewerage requires a clear understanding of the frictional losses incurred during the transport of the slurry. This abstracts describes numerical & CFD-based methods to estimate losses while the concentrated slurry flows through circular pipes in a fully-turbulent flow. To model turbulent flows through circular pipes, one can rely on either the Newtonian Moody Charts appropriate for engineering applications or a computational fluid dynamics (CFD)-based analysis, made possible through the Newtonian universal law of the wall. However, our studies reveal that concentrated domestic slurry behaves like a non-Newtonian fluid, of the Herschel-Bulkley type. Therefore, the analysis of such a slurry would require modifications to both, existing engineering models and CFD methods. This abstract summarises a modified law of the wall suitable for Herschel-Bulkley fluids, which has been validated against experiments on concentrated domestic slurry. It further details possible non-Newtonian numerical engineering models that could be modified to assess frictional losses incurred by Herschel-Bulkley fluids. The latter will be a quicker and perhaps reliable alternative to computationally expensive CFD-analyses.
Original language | English |
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Title of host publication | New Trends in Urban Drainage Modelling - UDM 2018 |
Editors | Giorgio Mannina |
Publisher | Springer |
Pages | 528-532 |
Number of pages | 5 |
ISBN (Print) | 9783319998664 |
DOIs | |
Publication status | Published - 2019 |
Event | 11th International Conference on Urban Drainage Modelling, UDM 2018 - Palermo, Italy Duration: 23 Sept 2018 → 26 Sept 2018 |
Publication series
Name | Green Energy and Technology |
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Conference
Conference | 11th International Conference on Urban Drainage Modelling, UDM 2018 |
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Country/Territory | Italy |
City | Palermo |
Period | 23/09/18 → 26/09/18 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Keywords
- Computational fluid dynamics
- Concentrated domestic slurry
- Herschel-Bulkley fluid
- Non-Newtonian flow
- Turbulence
- Urban drainage