The Effect of Rotational Speed on Granular Dynamics and Homogenization in a Vertical Bladed Mixer.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F17%3A00469338" target="_blank" >RIV/67985858:_____/17:00469338 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/44555601:13440/16:43888174 RIV/44555601:13430/16:43888174 RIV/60461373:22340/16:43902929

Výsledek na webu

<a href="http://www.springer.com/us/book/9789811019258" target="_blank" >http://www.springer.com/us/book/9789811019258</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-981-10-1926-5_117" target="_blank" >10.1007/978-981-10-1926-5_117</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Rotational Speed on Granular Dynamics and Homogenization in a Vertical Bladed Mixer.

Popis výsledku v původním jazyce

Mixing of granular materials is very widespread operation used in many industrial applications. Nevertheless, at present time the descriptions of homogenizationnmechanisms are still not well explained. Therefore, in this work the mixing process of approximately 42,000 spherical beads differed only by their colors was studied in a vertical mixer with two opposed flat blades with 45° rake angle by using Discrete Element Method (DEM). Generally, it is known for liquids that rotational flow can be divided into two types: primary and secondary motions. Homogenization is especially caused by secondary flow. In case of granular mixing, the situation is not so simple. Even though many investigations deal with the influence of secondary flow in liquids, knowledge about existence of the granular secondary motion is almost negligible. In this work, the methodology for granular secondary flow detection is proposed by averaging radial and axial velocity fields in tangential direction. The main aim of this work is the description of influence of primary and secondary flows on the homogenization process. It has turned out that tangential velocity has significant effect on the homogenization of side-by-side configuration and secondary flow influences especially effectiveness of mixing process for bottom-up initial packing.

Název v anglickém jazyce

The Effect of Rotational Speed on Granular Dynamics and Homogenization in a Vertical Bladed Mixer.

Popis výsledku anglicky

Mixing of granular materials is very widespread operation used in many industrial applications. Nevertheless, at present time the descriptions of homogenizationnmechanisms are still not well explained. Therefore, in this work the mixing process of approximately 42,000 spherical beads differed only by their colors was studied in a vertical mixer with two opposed flat blades with 45° rake angle by using Discrete Element Method (DEM). Generally, it is known for liquids that rotational flow can be divided into two types: primary and secondary motions. Homogenization is especially caused by secondary flow. In case of granular mixing, the situation is not so simple. Even though many investigations deal with the influence of secondary flow in liquids, knowledge about existence of the granular secondary motion is almost negligible. In this work, the methodology for granular secondary flow detection is proposed by averaging radial and axial velocity fields in tangential direction. The main aim of this work is the description of influence of primary and secondary flows on the homogenization process. It has turned out that tangential velocity has significant effect on the homogenization of side-by-side configuration and secondary flow influences especially effectiveness of mixing process for bottom-up initial packing.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/GAP105%2F12%2F0664" target="_blank" >GAP105/12/0664: Hydromechanické interakce v soustavě tuhá fáze - tekutina</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 7th International Conference on Discrete Element Methods

ISBN

978-981-10-1925-8

ISSN

0930-8989

e-ISSN

1867-4941

Počet stran výsledku

9

Strana od-do

1123-1131

Název nakladatele

Springer Science+Business Media

Místo vydání

Singapore

Místo konání akce

Dalian University of Technology, Dalian

Datum konání akce

1. 8. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000416515400117