Extended Data Fig. 5: Particle resuspension critical velocity analysis.
From: Bioinspired capillary force-driven super-adhesive filter
a, Schematic representing forces exerted on particles adhering to filter fiber. Position of particle on filter fiber was postulated that it was repositioned along the rounded surface of fiber by drag forces, as depicted. b, Reynolds numbers corresponding to PM1.0µm, PM2.5µm, and PM10µm plotting as a function of face velocity, with a demarcation at a Reynolds number of 1 to separate Stokes’ region from transition region. c,d, The theoretical computations for critical detachment velocities V(cr) for bare (c) and PRO (d) filters as functions of particle size and face velocity. Points of intersection between media velocity V(m) and critical detachment velocity V(cr) are highlighted in red dots, indicating the onset of particle detachment. Detailed numerical calculation corroborated in Supplementary Information Section 5.
