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pro vyhledávání: '"Grosshans, Holger"'
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 ignition source. However, definite proof is usually lacking since the
Externí odkaz:
http://arxiv.org/abs/2410.03547
Autor:
Jantač, Simon, Grosshans, Holger
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 motion of light particles. Thus, the particles' charge distribution depend
Externí odkaz:
http://arxiv.org/abs/2401.17071
This article reports on measurements of the electrostatic charge of particles in a turbulent duct flow. In contrast to previous charge measurements, which do not apply to turbulent flows or give only the sum of all particles' charges, the new method
Externí odkaz:
http://arxiv.org/abs/2306.06970
Autor:
Ozler, Gizem, Grosshans, Holger
The globally supported social distancing rules to prevent airborne transmission of COVID-19 assume small saliva droplets evaporate fast and large ones, which contain most viral copies, fall fast to the ground. However, during evaporation, solutes dis
Externí odkaz:
http://arxiv.org/abs/2305.04667
Tribocharging increases due to deformation and penetration of surface asperities, enlarging the real contact area. These experimental results translate into a theoretical description of particle charging that resolves the surface topology. Based on t
Externí odkaz:
http://arxiv.org/abs/2304.13441
Autor:
Jantač, Simon, Grosshans, Holger
Current models predict particles of the same material but different sizes to charge bipolar upon contacts; the resulting charge peaks endanger process safety. However, we found wall-bounded turbulence to suppress the powder's electrostatic charging.
Externí odkaz:
http://arxiv.org/abs/2303.13882
Publikováno v:
Ozler, G., Demircioglu, M., & Grosshans, H. (2023). Effect of drag force modeling on the flow of electrostatically charged particles. Advanced Powder Technology, 34(2), 103951
In CFD simulations of two-phase flows, accurate drag force modeling is essential for predicting particle dynamics. However, a generally valid formulation is lacking, as all available drag force correlations have been established for specific flow sit
Externí odkaz:
http://arxiv.org/abs/2302.03450
Autor:
Grosshans, Holger
The dynamics of the transported powder determines the functionality and safety of pneumatic conveying systems. The relation between the carrier gas flow, induced by the flown-through geometry, and the powder flow pattern is not clear yet for electros
Externí odkaz:
http://arxiv.org/abs/2212.04956
Autor:
Grosshans, Holger, Jantač, Simon
Thus far, Computational Fluid Dynamics (CFD) simulations fail to predict the electrostatic charging of particle-gas flows reliably. The lack of a predictive tool leads to powder operations prone to deposits and discharges, making chemical plants unsu
Externí odkaz:
http://arxiv.org/abs/2212.04915
Autor:
Xu, Wenchao, Grosshans, Holger
Electrostatic charge on powders arises during pneumatic transport due to particle-particle and particle-surface interactions via triboelectrification. This is a potential threat to the safety of industrial productions and the source of numerous fires
Externí odkaz:
http://arxiv.org/abs/2206.04345