Experimental determination of particle-particle restitution coefficient via double pendulum method

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27730%2F18%3A10238919" target="_blank" >RIV/61989100:27730/18:10238919 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0263876218302478" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263876218302478</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cherd.2018.05.016" target="_blank" >10.1016/j.cherd.2018.05.016</a>

Result language

angličtina

Original language name

Experimental determination of particle-particle restitution coefficient via double pendulum method

Original language description

The coefficient of restitution e is determined as the ratio of the final to the initial relative velocity between two moving objects after their collision. It is also one of the basic features and parameters for contact models of the discrete element method (DEM). The virtual simulation of industrial processes using DEM modelling is currently undergoing a great development both in the ways of application and in the complexity of the individual models. Therefore, input values need to be constantly refined to ensure the quality outputs of these numerical models. This article describes an experimental method of measuring the coefficient of restitution of two particles by means of a double pendulum, which presents a number of problems especially for non-spherical particles. At the same time, this article presents three options for evaluating the proposed experiment, including their comparison and description of their pros and cons. A series of experiments with particles of different sizes, shapes and materials was performed and their coefficients of restitution were determined. The presented method allows to be used on a broad scale especially for spherical particles of &gt; 5 mm, the coefficient of restitution can be determined very accurately. To some degree, this applies to non-spherical particles of mass in tens of grams and of different materials as well. Their initial coefficient of restitution can be determined with a high degree of precision, which is important for using in contact models definition. The accuracy of the contact model is dependent on accurate specification of restitution coefficient. In this study, values of the coefficients of restitution of various shapes such as wood particles, particles of maize, spruce cylindrical pellets and coal were experimentally determined.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

<a href="/en/project/ED2.1.00%2F19.0389" target="_blank" >ED2.1.00/19.0389: Research Infrastructure Development of the CENET</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemical Engineering Research and Design

ISSN

0263-8762

e-ISSN

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Volume of the periodical

135C

Issue of the periodical within the volume

2018

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

222-233

UT code for WoS article

000439673000020

EID of the result in the Scopus database

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