Numerical study of rectified electroosmotic flow in nanofluidics: Influence of surface charge and geometrical asymmetry

The transport of ions in nanofluidic systems, specifically the rectified ion or ionic diode phenomenon occurring presence asymmetrical geometry and/or charge distribution, has drawn considerable attention due to its relevance energy conversion and biosensing applications. However, previous numerical research frequently overlooked concurrent liquid flow within these even though multiple experimental studies have highlighted intriguing patterns configurations. In present study, we employ comprehensive simulations probe influence geometrical asymmetry a system on electroosmotic transport. These Poisson–Nernst–Planck equation conjunction with Navier–Stokes equation. Our findings reveal that when current rectification trend is consistent between conical straight nanopores, geometric can generate significant variations effects flow. Furthermore, our indicates direction be independently manipulated by utilizing asymmetry, thereby facilitating advanced control flows systems. Collectively, contribute more profound understanding mechanisms underlying osmotic propose novel approach for developing efficient