Journal article

Impact of three-dimensional sphericity and roundness on heat transfer in granular materials

W Fei, GA Narsilio, MM Disfani

Powder Technology | Elsevier BV | Published : 2019


Knowledge of particle morphology is vital to understand the behaviour of natural geomaterials including heat transfer. The effects of particle shape on heat transfer have been mostly quantified with two-dimensional (2D) particle descriptors or at most with a single three-dimensional (3D) descriptor. However, these particle shape descriptors may fail to capture the shape of all irregular particles. To redress this issue, we developed a method to reconstruct particles from micro-computed tomographic (μCT) images and to extract 3D sphericity and roundness of individual particles in the assembly. Sphericity and roundness of five real sand packings are calculated using the new proposed method. Fu..

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Funding Acknowledgements

The authors acknowledge Yu Zhou for taking micro-photos of the sands. The CT images were obtained using the Imaging and Medical Beam Line (IMBL) at the Australian Synchrotron, Victoria, Australia. We acknowledge Dr. Anton Maksimenko and the other beam scientists at Australian Synchrotron for their support during our experiments. This work is supported by the Melbourne Research Scholarship from The University of Melbourne.