Microscale Hydrodynamic Cloaking and Shielding via Electro-Osmosis

We demonstrate theoretically and experimentally that injection of momentum in a region surrounding an object microscale flow can yield both “cloaking” conditions, where the field outside cloaking is unaffected by object, “shielding” hydrodynamic forces on are eliminated. Using field-effect electro-osmosis as mechanism for momentum, we present theoretical framework analytical solutions range geometrical shapes, validate these numerically experimentally, ability to dynamically switch between different states.Received 1 December 2020Accepted 24 March 2021DOI:https://doi.org/10.1103/PhysRevLett.126.184502© 2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasElectrokinetic flowsMicrofluidicsPhysical SystemsMicrofluidic devicesTechniquesHele-Shaw cellFluid Dynamics