Electro-osmotic effect on the heat and mass transfer of a viscoelastic nanofluid flow in a curved channel

Abstract

For the past two decades, nanofluids have become the interest of researchers and engineers because of their thermo-physical features. The aim of the current investigation is to investigate the thermal behavior of peristaltically supporting viscoelastic tiny particles endorsed by electro-osmotic force. The Debye-Huckel linearization scheme and zero Reynolds assumptions are used to simplify the governing equations. The current formulation deals with the peristaltic motion of nanofluid in a two-dimensional curved channel. The complex arrangement of sinusoidal waves is used to enhance the pumping performance at the boundary walls. In the present analysis, the Buongiorno formulation is used for nanofluids. The Jeffrey fluid model is used in the current study as a viscoelastic fluid due to its both viscous and elastic features. The numerical solution is obtained using the NDsolve procedure. The graphs of flow features, such as stream function, axial velocity, temperature field, mass concentration, and electric potential function are plotted for various rheological parameters. Quantitative results related to the heat transfer coefficient and Sherwood number for different values of flow parameters are also provided. The asymmetry nature is observed in the diagram of axial velocity due to the curved shape of the flow regime. The mass concentration is enhanced (reduced) by aggregating thermal (Brownian) motion parameter. The temperature and mass concentration are enhanced by increasing Prandtl and Eckert numbers. Comparison between Newtonian and viscoelastic model is also argued in the current formulation. This study gives information of biological fluids flow relevance to micro-medical devices, nanoscale devices, electro-osmotic separation devices and complex pumps via peristaltic pumping.