Transport Control of Eyring-Fluids along a Transversely-Corrugated Nanoannulus

TL;DR

This paper analytically investigates how wavy-roughness and phase shifts in nanoannuli influence the flow of Eyring-fluids, revealing mechanisms for flow enhancement and control in nanofluidic systems.

Contribution

It provides an analytical model for Eyring-fluid flow in wavy-rough nanoannuli, highlighting the effects of surface roughness and phase shifts on flow direction and rate.

Findings

Wavy-roughness enhances flow rate, especially at lower forcing.

Phase shift can reverse or tune flow direction.

Flow control mechanisms are identified for nanofluidic applications.

Abstract

The volume flow rates of Eyring-fluids inside the wavy-rough nanoannulus were obtained analytically (up to the second order) by using the verified model and boundary perturbation method. Our results show that the wavy-roughness could enhance the flow rate especially for smaller forcing due to the larger surface-to-volume ratio and slip-velocity effect. Meanwhile, the phase shift between the outer and inner walls of nanoannuli could tune the transport of Eyring-fluids either forward or backward when the wavy-roughness of a nanoannulus is larger enough. Our results could be applied to the flow control in nanofluidics as well as biofluidics.