Combined effect of moisture and electrostatic charges on powder flow
It is well known in industrial applications involving powders and granular materials that the relative air humidity and the presence of electrostatic charges influence drastically the material flowing properties. The relative air humidity induces the formation of capillary bridges and modify the gra...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201714013009 |
| _version_ | 1818583166059806720 |
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| author | Rescaglio Antonella Schockmel Julien Vandewalle Nicolas Lumay Geoffroy |
| author_facet | Rescaglio Antonella Schockmel Julien Vandewalle Nicolas Lumay Geoffroy |
| author_sort | Rescaglio Antonella |
| collection | DOAJ |
| description | It is well known in industrial applications involving powders and granular materials that the relative air humidity and the presence of electrostatic charges influence drastically the material flowing properties. The relative air humidity induces the formation of capillary bridges and modify the grain surface conductivity. The presence of capillary bridges produces cohesive forces. On the other hand, the apparition of electrostatic charges due to the triboelectric effect at the contacts between the grains and at the contacts between the grains and the container produces electrostatic forces. Therefore, in many cases, the powder cohesiveness is the result of the interplay between capillary and electrostatic forces. Unfortunately, the triboelectric effect is still poorly understood, in particular inside a granular material. Moreover, reproducible electrostatic measurements are difficult to perform. We developed an experimental device to measures the ability of a powder to charge electrostatically during a flow in contact with a selected material. Both electrostatic and flow measurements have been performed in different hygrometric conditions. The correlation between the powder electrostatic properties, the hygrometry and the flowing behavior are analyzed. |
| first_indexed | 2024-12-16T08:00:57Z |
| format | Article |
| id | doaj.art-f9fa32af467b4bcfb64f004898c02ec4 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-16T08:00:57Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-f9fa32af467b4bcfb64f004898c02ec42022-12-21T22:38:36ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011401300910.1051/epjconf/201714013009epjconf162066Combined effect of moisture and electrostatic charges on powder flowRescaglio Antonella0Schockmel Julien1Vandewalle Nicolas2Lumay Geoffroy3CESAM-GRASP, University of LiégeCESAM-GRASP, University of LiégeCESAM-GRASP, University of LiégeCESAM-GRASP, University of LiégeIt is well known in industrial applications involving powders and granular materials that the relative air humidity and the presence of electrostatic charges influence drastically the material flowing properties. The relative air humidity induces the formation of capillary bridges and modify the grain surface conductivity. The presence of capillary bridges produces cohesive forces. On the other hand, the apparition of electrostatic charges due to the triboelectric effect at the contacts between the grains and at the contacts between the grains and the container produces electrostatic forces. Therefore, in many cases, the powder cohesiveness is the result of the interplay between capillary and electrostatic forces. Unfortunately, the triboelectric effect is still poorly understood, in particular inside a granular material. Moreover, reproducible electrostatic measurements are difficult to perform. We developed an experimental device to measures the ability of a powder to charge electrostatically during a flow in contact with a selected material. Both electrostatic and flow measurements have been performed in different hygrometric conditions. The correlation between the powder electrostatic properties, the hygrometry and the flowing behavior are analyzed.https://doi.org/10.1051/epjconf/201714013009 |
| spellingShingle | Rescaglio Antonella Schockmel Julien Vandewalle Nicolas Lumay Geoffroy Combined effect of moisture and electrostatic charges on powder flow EPJ Web of Conferences |
| title | Combined effect of moisture and electrostatic charges on powder flow |
| title_full | Combined effect of moisture and electrostatic charges on powder flow |
| title_fullStr | Combined effect of moisture and electrostatic charges on powder flow |
| title_full_unstemmed | Combined effect of moisture and electrostatic charges on powder flow |
| title_short | Combined effect of moisture and electrostatic charges on powder flow |
| title_sort | combined effect of moisture and electrostatic charges on powder flow |
| url | https://doi.org/10.1051/epjconf/201714013009 |
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