Homotopy assessment on the stratified micropolar Carreau–Yasuda bio-inspired radiative copper and gold/blood nanofluid flow on a Riga plate.

Copper Cu\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\left( {{\text{Cu}}} \right)$$\end{document} and gold Au\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\left( {{\text{Au}}} \right)$$\end{document} nanoparticles have been studied for a variety of applications in a base fluid blood including drug delivery is used as a carrier for drugs, allowing for targeted delivery to specific cells or tissues in the body, as a biosensors to detect specific biomolecules and pathogens in blood. These biosensors can be utilized for medical diagnostics, food safety testing and environmental monitoring. Also, copper and gold nanoparticles in blood are utilized for wound healing, cancer therapy, photothermal therapy and imaging, etc. Due to above applications, copper and gold are immersed as solid nanoparticles in blood (pure fluid) in current investigation. This article's main objective is to scrutinize the mixed convective flow of a hybrid (copper and gold/blood) nanoliquid made of micropolar Carreau–Yasuda fluid. The flow at the stagnant point passes by a Riga plate that has been convectively heated. The features of thermal and mass transportation are greatly boosted by including the model of thermal and mass flux proposed by Cattaneo–Christov. The motile microorganism mechanism is also examined on the flow behavior. The consequences of radiant heat, chemical reactions, Brownian motion, and thermal diffusivity are considered. Additionally, the outcomes of thermal and solutal stratification are applied to problem under consideration. The design of the current model uses higher-order partial differential equations (PDEs) that are shifted to ordinary differential equations (ODEs) by employing appropriate variables and then have been evaluated using homotopy analysis approach (HAM). Several flow parameters are employed to determine the variation in various flow patterns. Tables are used to discuss drag forces, heat and mass transport rates in relation to many relevant parameters. The prime outcomes of the work are that improving the estimates of nanoparticles concentration causes the thermal distribution to rise and velocity distribution to retard. The acceleration of the Weissenberg number elevates the velocity distribution. The raising of thermal stratification factor causes the hybrid nanoliquid temperature to reduce. The microorganism’s outline declines against the amplifying estimates of bioconvection Lewis number and microorganism’s stratification factor. The stretching parameter improves the velocity of nanofluid. [ABSTRACT FROM AUTHOR]