Comparison of GeoDict and Fluent simulations for mechanical and electrostatic filtration efficiency
Validation: FilterDict
For the validation of GeoDict filtration efficiency simulations, the results were compared with corresponding Fluent simulations for a small representative filter structure consisting of 10 fibers, where the 3D structure and a corresponding flow field are visualized in Figure 1. The simulations included both mechanical and electric filtration mechanisms.
Mechanical particle capture was evaluated by considering impaction and interception as well as Brownian diffusion, while the electric contribution included electrostatic attraction and dielectrophoretic effects.
The filtration efficiencies predicted by GeoDict were then compared directly with the Fluent results for the same structure and physical assumptions. Due to the significantly higher computational runtime required by Fluent, the comparison was limited to this relatively small example. Nevertheless, the agreement between the GeoDict and Fluent simulations, shown in Figure 2, provides a validation of the GeoDict approach for predicting combined mechanical and electrostatic filtration efficiency. This validation study was performed as part of the publicly funded ElekSim project.
