Experimental, numerical and analytical investigation of electro-hydrodynamic flow in point-to-ring corona discharge

POSTER

Abstract

An electrohydrodynamic (EHD) flow in a point-to-ring corona configuration is investigated experimentally and via multiphysics mathematical and computational model. The mathematical model couples the ion transport equation and the Navier-Stokes equations (NSE) to solve for the spatial distribution of electric field, flow field, and charge density. The numerical model includes temporal resolution and charge diffusion. Modeling results are validated against experimental measurements of the cathode voltage, ion concentration, and velocity profiles. The maximum flow velocity is at the centerline, and it decays rapidly with radial distance due to the viscous and electric forces acting on the partially-ionized gas. To understand this coupling, a nondimensional parameter, X, is formulated as the ratio of the local electric force to the inertial term in the NSE. The approach allows the model to be used for the entire EHD domain, providing insights into the near-field flow in the corona region.

*This research was supported by the DHS Science and Technology Directorate, Homeland Security Advanced Research Projects Agency, Explosives Division, and UK Home Office; grant no. HSHQDC-15-531 C-B0033

Presenters

  • Igor Novosselov

    • University of Washington
    • Mechanical Engineering, University of Washington
    • Department of Mechanical Engineering, University of Washington

Authors

  • Igor Novosselov

    • University of Washington
    • Mechanical Engineering, University of Washington
    • Department of Mechanical Engineering, University of Washington

  • Yifei Guan

    • University of Washington
    • Mechanical Engineering, University of Washington
    • Department of Mechanical Engineering, University of Washington

  • Ravi Sankar Vaddi

    • Mechanical Engineering, University of Washington
    • Department of Mechanical Engineering, University of Washington

  • Alberto Osuna Aliseda

    • University of Washington
    • Department of Mechanical Engineering, University of Washington
    • Department of Mechanical Engineering, University of Washington, Seattle, WA, USA, Department of Neurological Surgery, University of Washington, Seattle, WA, USA
    • Mechanical Engineering Department, University of Washington
    • Department of Mechanical Engineering, University of Washington, Seattle, WA, USA
    • Mechanical Engineering, University of Washington, Seattle, USA