A coefficient of restitution model for particle-surface collision of particles with a wide range of mechanical characteristics

Autor(es)

Melo, Karla R. B. ^[1] ; de Padua, Thiago F. ^[2] ; Lopes, Gabriela C. ^{[2, 1]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Chem Engn Grad Program, Rod Washington Luiz, Km 235 SP 310, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem Engn, Rod Washington Luiz, Km 235 SP 310, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ADVANCED POWDER TECHNOLOGY; v. 32, n. 12, p. 4723-4733, DEC 2021.
• Citações Web of Science: 0

Resumo

The coefficient of restitution describes the energy dissipation resulting from particle-particle and particle-surface interactions in solid-fluid flows. The energy loss depends on the mechanical characteristics of the solid phase, therefore, to correctly predict the behavior of these systems it is necessary to use reliable coefficient values based on the properties of the particles. This paper investigated the energy dissipation in particle-surface collisions using 7 types of particles with a wide range of mechanical properties (Young's modulus between 1.38 x 10(4) and 2.83 x 10(9) Pa). Three empirical equations have been proposed to calculate the coefficient of restitution based on the impact velocity and the compressional wave velocity. The experimental results presented an inverse relation between the impact velocity and the coefficient of restitution. This effect was more pronounced for less elastic particles. The models presented an accurate fit to the experimental data and statistical analysis showed that the Power model presented the greater capacity to predict the coefficient of restitution from generic data. The experimental results showed the predominant effect of mechanical characteristics on the coefficient of restitution. In addition, the proposed equations are proved to be precise tools for predicting particle coefficients of restitution with a wide range of elasticity modulus at low velocities. (C) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved. (AU)

• Processo FAPESP: 18/20711-2 - Modelagem e análise experimental do escoamento de esferas macias em fluidos viscosos: estudo de colisões partícula-partícula e partícula-superfície e da interação partícula-fluído
• Beneficiário: Karla Raphaela Braga de Melo
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/25146-4 - Efeito de forças hidrodinâmicas em colisões partícula-partícula e partícula-superfície em escoamentos com fluidos viscosos
• Beneficiário: Karla Raphaela Braga de Melo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/16036-8 - Colisões inelásticas e sua influência sobre a dinâmica do escoamento líquido-sólido: um estudo experimental e numérico
• Beneficiário: Gabriela Cantarelli Lopes
• Modalidade de apoio: Auxílio à Pesquisa - Regular