5 citations · 17 across the 10 of their papers we have counts for
11 papers
Effect of Reynolds number on triboelectric particle charging in turbulent channel flow
Christoph Wilms, Holger Grosshans
Triboelectric charging in particle-laden flows is a complex interplay of fluid and particle dynamics, collision mechanics, and electrostatics. In this study, we introduce triboFoam…
Divergent Impact Charging of Polymer Particles
Simon Jantač, Holger Grosshans
When a particle contacts a surface of another material, it is commonly believed that the particle acquires an impact charge that scales inversely with its pre-impact charge and who…
The effect of discontinuous injection on particle back-flow in pneumatic conveying systems
Otome Obukohwo, Andrew Sowinski, Poupak Mehrani +1
Pneumatic conveying is used in many process industries to transport dry, granular, and powdered solids. The triboelectrification of particles during conveying causes particle agglo…
ML enhanced measurement of the electrostatic charge distribution of powder conveyed through a duct
Christoph Wilms, Wenchao Xu, Gizem Ozler +3
The electrostatic charge acquired by powders during transport through ducts can cause devastating dust explosions. Our recently developed laser-optical measurement technique can re…
Secondary flows drive triboelectric powder charging in pneumatic conveying
Gizem Ozler, Holger Grosshans
Highly resolved simulations reveal the fundamental influence of a carrier fluid's flow dynamics on triboelectric powder charging. We found that particles transported through a squa…
A Novel Apparatus For Particle-Particle Single Contact Electrification Experiments
Otome Obukohwo, Simon Jantač, Andrew Sowinski +2
The experiment of a single contact between two sub-centimeter high-speed particles is often difficult to execute, especially if the collision must be physically and electrically is…
Unifying same- and different-material particle charging through stochastic scaling
Holger Grosshans, Gizem Ozler, Simon Jantač
Triboelectric charging of insulating particles through contact is critical in diverse physical and engineering processes, from dust storms and volcanic eruptions to industrial powd…
Influence of the particle distribution on dust explosions in the 20 L sphere
Kasun Weerasekara, Stefan H. Spitzer, Sabine Zakel +1
It is essential to standardize the safety characteristics of dust explosions to mitigate their impact on the process industries. The 20 L sphere primarily investigates the safety c…
Unmasking hidden ignition sources: A new approach to finding extreme charge peaks in powder processing
Holger Grosshans, Wenchao Xu, Simon Jantač +1
Powders acquire a high electrostatic charge during transport and processing. Consequently, in the aftermath of dust explosions, electrostatic discharge is often suspected to be the…
Influence of the Reynolds number from to on size-dependent bipolar charging
Simon Jantač, Holger Grosshans
We recently found wall-bounded turbulence to suppress and control bipolar triboelectric charging of particles of identical material. This control is due to fluid modifying the moti…
Polarity switch of PMMA powder transported through a PMMA duct
Wenchao Xu, Holger Grosshans
During pneumatic conveying, powder electrifies rapidly due to the high flow velocities. In our experiments, the particles even charge if the conveying duct is made of the same mate…