Dry separation technology is a sustainable alternative to conventional wet separation technology for production of food ingredients. This paper is concerned with the exploration of a new driving force for dry separation, i.e. triboelectrification. To investigate the possibilities of this driving force, we modified our in-house DEM-CFD code to model a learning system where powder is tribo-electrically charged by conveying it pneumatically through a squared tube. The charged particles will electrostatically interact with both other charged particles, as well as their induced charges on the conducting walls. We show that the amount of acquired charge depends on the electrostatic interaction between particles and walls and show the corresponding spatial distribution of the particles. They depend both highly on the (mean) charge of the particles. We observed a critical charge per particle after which particles charged rapidly to their saturation charge. This critical charge is delicate and lower than expected from first order derivations.
|Title of host publication||Conference proceeding of the 2013 Annual Meeting of the Electrostatics Society of America, 11-13 June 2013, Cocoa Beach, Florida|
|Publication status||Published - 2013|
|Event||conference; 2013 Annual Meeting of the Electrostatics Society of America; 2013-06-11; 2013-06-13 - |
Duration: 11 Jun 2013 → 13 Jun 2013
|Conference||conference; 2013 Annual Meeting of the Electrostatics Society of America; 2013-06-11; 2013-06-13|
|Period||11/06/13 → 13/06/13|
|Other||2013 Annual Meeting of the Electrostatics Society of America|