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Apparatus for measuring friction inside granular materials : granular friction analyzer
ID
Bek, Marko
(
Author
),
ID
Gonzalez-Gutierrez, Joamin
(
Author
),
ID
Moreno López, Jesús Alejandro
(
Author
),
ID
Bregant, Dušan
(
Author
),
ID
Emri, Igor
(
Author
)
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https://www.sciencedirect.com/science/article/pii/S0032591015301571?via%3Dihub
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Abstract
Flow of granular materials is a complex process but it is important to measure, because the flow of granular material during processing, handling and transportation strongly influences the quality of the final product and its cost. Flowability of granular materials depends on the characteristics of the material and on the conditions at which flow is occurring. Existing methods of measuring flowability of powders are described in this paper, and a new methodology is introduced to measure friction between granular materials under pressure induced with uniaxial compression. Apparatus also allows analysis of conditions at which granular material starts to flow when exposed to uniaxial compressive load, i.e., zero-rate flowability. We call the apparatus the Granular Friction Analyzer (GFA). The concept of the GFA was tested by measuring four different materials with different average particle sizes. It was observed that as the particle size decreases so does its zero-rate flowability. This is in agreement with powder literature. Therefore, it can be concluded that in general the GFA method can be a very useful tool to study friction between granular materials and conditions at which the granular material flow initiates, i.e. zero-rate flowability of powders under pressure. However, further improvements are required to increase its sensitivity and accuracy.
Language:
English
Keywords:
granular materials
,
inherent friction
,
zero-rate flowability
,
granular flow
,
metal powders
,
uniaxial compression
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Publication status:
Published
Publication version:
Author Accepted Manuscript
Year:
2016
Number of pages:
Str. 255-265
Numbering:
Vol. 288
PID:
20.500.12556/RUL-105549
UDC:
620.1:62-492-026.772(045)
ISSN on article:
0032-5910
DOI:
10.1016/j.powtec.2015.11.014
COBISS.SI-ID:
14351899
Publication date in RUL:
05.12.2018
Views:
1497
Downloads:
561
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Record is a part of a journal
Title:
Powder technology
Shortened title:
Powder technol.
Publisher:
Elsevier Sequoia
ISSN:
0032-5910
COBISS.SI-ID:
6576645
Secondary language
Language:
Slovenian
Keywords:
granulirani materiali
,
kovinski prah
,
enoosna kompresija
,
pretočnost
,
inherentno trenje
,
pretočnost granuliranih materialov
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0264; P-MR-10/148
Name:
Trajnostni Polimerni materiali in Tehnologije; Absorberji vibracij in hrupa železniških tirov
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