Numerical simulation of an air extraction system (dirty air domain, filter media and clean air domain) for abrasive dust.

E. Dongmo*, N. Frank, Keller Lufttechnik GmbH + Co. KG, Germany

"Keller Lufttechnikā€¯ has been a leader in industrial filtration technology for decades, with new process technologies from their research and development in addition to their longstanding expertise in providing suitable extraction solutions for most manufacturing processes.
In the past, the principle of "trial and error" prevailed; meaning the development and process optimization of extraction systems was achieved with strenuous and expensive experiments. For this reason, "Keller Lufttechnikā€¯ introduces the numerical simulation for the virtual development and analysis of complex systems.

Computational fluid dynamics were used in this paper to analyze the complete filtration system (dirty air, pre-separator and clean air represent the "fluid domain", filter media as the "Porous Domain", industrial dust as "dispersed particles", ...). The aim of this simulation was to obtain a solution to the abrasion of the filter medium by abrasive dust during extraction.

The analysis of the parameters such as porosity, permeability and the "viscous resistance" for the simulation of the realistic pressure loss in porous media is a very complex task. Various empirical pressure loss models such as Darcy, Carman-Kozeny and Ergun were analyzed and implemented in the simulation model for this study.
The simulation results of the pressure and velocity distribution inside the filtration system (dirty air, pre-separator, filter media and clean air) as well as the representative particle trajectories are presented in this paper.

Furthermore these simulation results have been successfully applied to optimize the filter system as well as to prevent the impact of abrasive particles on the filter surface area...

Session: G8 - Modelling and Simulation I
Day: 12 October 2016
Time: 10:45 - 12:00 h