Quartic autocatalysis of homogeneous and heterogeneous reactions in the bioconvective flow of radiating micropolar nanofluid between parallel plates

Abstract

This study deals with the quartic autocatalysis of homogeneous–heterogeneous chemical reaction that occurs in the bioconvective flow of micropolar nanofluid between two horizontally parallel plates. The quartic autocatalysis is found to be more effective than cubic autocatalysis since the concentration of the homogeneous species is substantially high. The upper plate is assumed to be in motion and the lower plate is kept stationary. Such a flow of micropolar fluid finds application in the pharmaceutical industry, microbial enhanced oil recovery, hydrodynamical machines, chemical processing, and so forth. The governing equations for this flow are in the form of the partial differential equation and their corresponding similarity transformation is obtained through Lie group analysis. The governing equations are further transformed to coupled nonlinear differential equations that are linearized through the Successive linearization method and are solved using the Chebyshev Collocation method. The effects of various parameters, such as micropolar coupling parameter, spin gradient parameter, reaction rates, and so forth, are analyzed. It is observed that the fluid flows with a greater velocity away from the channel walls, whereas near the channel walls the velocity decreases with an increase in the coupling parameter. Furthermore, the spin parameter increases the spin gradient viscosity that reduces the microrotation of particles that further decreases the microrotation profile.

Quartic autocatalysis on horizontal surfaces with an asymmetric concentration: water-based ternary-hybrid nanofluid carrying titania, copper, and alumina nanoparticles

“…The effects of a Thompson and Troian slip boundary in an SWCNT/MWCNT-water nanofluid flow close to the point of stagnation along an expanding or contracting surface in a Dacry-Forchheimer porous medium combined with quartic autocatalysis chemical reaction was analyzed by Ramzan et al [25]. Additional studies have been referenced in; see [26][27][28][29][30].…”

Applications of bioconvection for tiny particles due to two concentric cylinders when role of Lorentz force is significant

“…Further, Koriko et al [ 20 ] analyzed the process of bio-convection comprising the implosion of microorganisms in a thixotropic nanofluid. Puneeth et al [ 21 ] discussed the homogeneous and heterogeneous chemical reactions with the quartic autocatalysis for the flow of micropolar nanofluid flowing in a channel subjected to thermal radiation for microorganism interference. Azam et al [ 22 ] evaluated the impact of nonlinear radiation in the flow of nanofluid under the influence of motile cells.…”

Impact of bioconvection on the free stream flow of a pseudoplastic nanofluid past a rotating cone

“…Furthermore, Koriko et al 21 analyzed the process of bioconvection thixotropic nanofluid caused by the swimming of motile cells. Puneeth et al 22 discussed the bioconvection process and the quartic autocatalysis chemical reactions in the flow of a micropolar nanofluid in a channel subject to thermal radiation. Azam et al 23 concluded that the radiation enhances the nanofluid temperature in the presence of motile microorganisms.…”