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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/ED2.1.00%2F19.0389" target="_blank" >ED2.1.00/19.0389: Rozvoj výzkumné infrastruktury Centra ENET</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Research and Design

ISSN

0263-8762

e-ISSN

—

Svazek periodika

135C

Číslo periodika v rámci svazku

2018

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

222-233

Kód UT WoS článku

000439673000020

EID výsledku v databázi Scopus

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