Yapa Mudiyanselage, Chehan L.K.Y., Sharma, Atul ORCID: https://orcid.org/0000-0002-6756-4148 and Bradley, Michael (2024) An investigation into pneumatic conveying characteristics of carbon granules in low velocity slug flow. In: Proceedings of the 11th International Conference on Conveying and Handling of Particulate Solids. CHoPS 2024 Conference, Edinburgh, UK, pp. 69-70. (doi:10.5281/zenodo.14034595)

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Abstract

Low velocity slug flow is an important pneumatic conveying application due to its reduced particle degradation and pipeline wear. This study examines the low velocity slug flow behaviour of two types of carbon granules (2–3 mm and 3–8 mm). Data was obtained from 30 conveying trials using an industry-scale pneumatic test rig at the Wolfson Centre in the University of Greenwich. During the experiments, a transparent pipe section enabled the observation of flow patterns and the estimation of slug velocity through videography analysis. Particle size distribution analysis was conducted after each test run to assess degradation using particle size distribution data of the conveyed material, with samples obtained using a full-stream cross-cut sampler. The analysis part focused on pressure drop across straight sections and bends, considering superficial air velocity, particle diameter (D50), solid loading ratio, and throughput. Videography-derived slug velocity was compared against predictions from the Legel and Schwedes (1984) equation to evaluate model accuracy. Additionally, the study also examined trends in particle degradation and their impact on pipeline pressure drop. Experimental data was used to evaluate the predictions of existing low velocity slug flow models developed by Kofu and Ochi (2008), Mi and Wypych (1994), and Pan and Wypych (1997). It was concluded that Kofu and Ochi’s model aligns relatively better with experimental data, although none of the models’ predictions are sufficiently reliable for real-world applications.

Item Type:	Conference Proceedings
Title of Proceedings:	Proceedings of the 11th International Conference on Conveying and Handling of Particulate Solids
Uncontrolled Keywords:	pneumatic conveying, low velocity slug flow, carbon granules, pressure drop, dense phase conveying
Subjects:	Q Science > Q Science (General) T Technology > T Technology (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Related URLs:	Organisation
Last Modified:	16 Mar 2026 15:16
URI:	https://gala.gre.ac.uk/id/eprint/52662

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