Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session D07: Electrokinetics: General
2:30 PM–4:40 PM,
Sunday, November 18, 2018
Georgia World Congress Center
Room: B212
Chair: William Ristenpart, University of California, Davis
Abstract ID: BAPS.2018.DFD.D07.2
Abstract: D07.00002 : Assessment of a reduced-order model for electroconvective flows and applications in optimization*
2:43 PM–2:56 PM
Presenter:
Arunraj Balaji
(Stanford University)
Authors:
Arunraj Balaji
(Stanford University)
Ali Mani
(Stanford University)
Electroconvection (EC) is a hydrodynamic instability that arises in a wide range of electrochemical applications involving voltage-driven transport of ions through an ion-selective surface. In most applications, such as desalination, EC leads to enhanced transport rate and faster product throughput. Simulation of EC requires direct numerical solution (DNS) of the coupled Poisson-Nernst-Planck and Navier-Stokes equations, which can be extremely expensive since most practical regimes demand high spatial and temporal resolutions. We present the assessment of a reduced-order model for EC flows in which the velocity field is constrained to have a prescribed, smooth, periodic profile, and the charge transport is modeled via quasi-electroneutral approximation. Instead of as a solution to the Navier-Stokes equation, the velocity magnitude is determined by a balance between input mechanical power from the local electrostatic forces and viscous dissipation. We present results from this model and discuss its application in estimating bounds of opportunity for optimization of EC flows.
*Supported by Stanford Graduate Fellowship (SGF) and the Precourt Institute for Energy
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.D07.2
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