Experimental investigation of pile characteristics of non-spherical particles mixtures: pile height and angle of repose Putri Mustika Widartiningsih, Muhammad Iqbal Rahmadhan Putra, Dimas Praja, Aufa Rudiawan, Sparisoma Viridi(*)
Granular Physics and Fluids Laboratory
Nuclear Physics and Biophysics Research Division
Faculty of Mathematics and Natural Sciences
Institut Teknologi Bandung
Jalan Ganesha 10, Bandung 40132, Indonesia
*dudung[at]gmail.com
Abstract
Angle of repose is defined as the steepest angle of a conical pile that is naturally formed when a bulk of particulate solid poured onto a flat surface. It has been considered as one of important properties in characterizing granular material due to its effectiveness in determining flowability of granular, pile profile in an opaque container, and granular transportation system. Since the angle of repose is sensitive to the shape of individual particles, investigations through experiments and simulations for various forms of particles have been carried out. However, most of them were performed under homogeneous particle system. While in practical situation, granular mixtures consisting of a variety of particle shapes are commonly employed. This study presents an experimental investigation of angles of repose resulting from a mixture of two types of non-spherical particles. Experiments have been carried out with different compositions and have been repeated five times to ensure their reproducibility. The results show that the angle of repose linearly corresponds to the granular composition, where the coefficient of determination is ~0.93. Consequently, this study has proved the relationship between granular composition and characteristic of bulk granular.
Keywords: angle of repose, granular mixture, granular pile, non-spherical particles
