ANALYSIS OF STATIC ANGLE OF REPOSE WITH RESPECT TO POWDER MATERIAL PROPERTIES

Authors

  • Oliver Macho Institute of Process Engineering, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava Námestie Slobody 17 81231 Bratislava Slovakia
  • Karin Demková High School of Jur Hronec Novohradská 3 82109 Bratislava Slovakia
  • Ľudmila Gabrišová Institute of Process Engineering, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava Námestie Slobody 17 81231 Bratislava Slovakia
  • Matúš Čierny Institute of Process Engineering, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava Námestie Slobody 17 81231 Bratislava Slovakia
  • Jitka Mužíková Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University Ak. Heyrovského 1203 50005 Hradec Králové Czech Republic
  • Paulína Galbavá Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava Ilkovicova 6 - Mlynská dolina 84215 Bratislava Slovakia
  • Žofia Nižnanská Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava Ilkovicova 6 - Mlynská dolina 84215 Bratislava Slovakia
  • Jaroslav Blaško Institute of Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava Ilkovicova 6 - Mlynská dolina 84215 Bratislava Slovakia
  • Peter Peciar Institute of Process Engineering, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava Námestie Slobody 17 81231 Bratislava Slovakia
  • Roman Fekete Institute of Process Engineering, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava Námestie Slobody 17 81231 Bratislava Slovakia
  • Marián Peciar Institute of Process Engineering, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava Námestie Slobody 17 81231 Bratislava Slovakia

DOI:

https://doi.org/10.14311/AP.2020.60.0073

Keywords:

Angle of repose, cohesion, powders, angle of internal friction, bulk density.

Abstract

This paper investigates the Angle of Repose (AoR) of powder materials with respect to their morphological and rheological properties. Glass beads, sand, flour and semolina of different particle sizes were used as the experimental materials. The investigated material was analysed with respect to particle shape and size. The rheological properties of the material were obtained by a shear cell test. The AoR was analysed in terms of cohesion, bulk density, particle size and circularity. More cohesive materials such as the flour samples exhibited the largest AoR > 40°, indicating their poor flowability. Glass bead samples with a high circularity value had significantly lower AoR than the flour. The Angle of Internal Friction values were not dependent on those of the AoR. Using a dimensional analysis, a mathematical model was developed to determine the AoR values based on the material properties. By the application of this model, highly accurate calculation of the value of AoR is made possible.

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Published

2020-03-02

Issue

Vol. 60 No. 1 (2020)

Section

Articles

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How to Cite

Macho, O., Demková, K., Gabrišová, Ľudmila, Čierny, M., Mužíková, J., Galbavá, P., Nižnanská, Žofia, Blaško, J., Peciar, P., Fekete, R., & Peciar, M. (2020). ANALYSIS OF STATIC ANGLE OF REPOSE WITH RESPECT TO POWDER MATERIAL PROPERTIES. Acta Polytechnica, 60(1), 73-80. https://doi.org/10.14311/AP.2020.60.0073