English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Capture, selective collection and flight manipulation of airborne particulateare three important functional requirements in various actively growing aerosoltechnology applications. Aerodynamic drag, particle inertia anddielectrophoretic (DEP) force due to externally applied electrostatic forcesinfluence the behavior of micron sized particles significantly, in suchsituations. In this work, we numerically study how a combination of theseforces uniquely influences the behavior of uncharged or mildly charged airborneparticles, distinct from that with their individual influences. Unchargedparticle movements in a numerically fabricated well structured steady vorticalflow between two curved electrode surfaces are analyzed. Vortical aircirculation towards and away from the electrode tip enhances and deteriorateselectrostatic particulate capture on the electrodes, termed as co and counterdirections with respect to the electrostatic force on particles respectively.Particles in counter vortices under an electric field reveals a rich variety ofunique behaviors due to the interplay of drag, inertia and DEP forces.Distortion of the vortex structure due to convexity of electrode surfacesresults in an inverse inertial limit cycle trajectory trapping of particles;with the airborne particles spatially segregated, trapping larger particlesfurther inside the vortex than the smaller particles.Value of a dimensionlessnumber $\xi_v$, the ratio of DEP force and particle inertia, represents thecombination of the operating flow and electric field strengths. Inertialcut-off of particle capture in this configuration abruptly shift to DEP captureat a critical value of $\xi_v\approx 0.2$, as its value increases. Selectivedeposition of particles within a closed range of size and density, emerges dueto the interplay of vortex trapping, inertial expulsion and electrostaticcapture.

Numerical study of airborne particle dynamics in vortices subject to electric field