Validate Simulation of Filter Efficiency versus Single Fiber Experiment

The validation setup reproduced the flow around a single fiber with a diameter of 30 µm by solving the Navier–Stokes equations for a range of Stokes numbers. Based on the computed flow field, the capture efficiency was determined for particles with a diameter of 1.77 µm. Particle–fiber interactions were modeled using the Hamaker collision model with a Hamaker constant of H = 1 × 10⁻¹⁸ and an interaction parameter R = 0.46. 

The agreement between the simulated capture efficiencies and the experimental reference data, shown in Figure 1, provides a validation of the GeoDict approach for predicting single-fiber filtration performance under the investigated conditions. Figure 2 shows a visualization of the simulated flow fields for two different stokes numbers.