Cattaneo-Christov dual diffusive non-Newtonian nanoliquid flow featuring nonlinear convection

Beg, OA; Nasir, M; Waqas, M; Kausar, MS; Zamri, N

Abstract

A theoretical study is presented of the transport characteristics in double diffusive tangent
hyperbolic (non-Newtonian) nanofluid boundary layer flow from a stretching flat surface. The Cattaneo–
Christov (non-Fourier and non-Fickian) double diffusion model is deployed in the formulations for energy
and species conservation, to determine more precisely temperature and concentration distributions with
thermal and solutual relaxation times. Non–linear mixed convection and heat generation/absorption are
included. The nanofluid approach combines Brownian motion and thermophoresis. Suitable
transformations are deployed to render the nonlinear partial differential system into a system of
dimensionless coupled ordinary nonlinear differential equations. The non-dimensional boundary value
problem is then solved with the homotopic analysis method (HAM). The distributions of velocity,
temperature and concentration of nanoparticles are depicted and investigated for the effects of multiple
emerging parameters. Velocity is reduced (and momentum boundary layer thickness elevated) with
increasing power–law index and Weissenberg number whereas velocity is elevated (and momentum
boundary layer thickness reduced) with increment in mixed convection variable. Temperature is suppressed
(and thermal boundary layer thickness depleted) with increasing thermal relaxation variable, heat sink
parameter, Prandtl number whereas temperature is enhanced (and thermal boundary layer thickness
boosted) with greater heat source parameter, Brownian motion parameter and thermophoresis parameter.
Nanoparticle concentration is depleted (and concentration boundary layer thickness reduced) with greater
Schmidt number and Brownian motion parameter whereas the opposite effect is induced with greater
thermophoresis parameter and solutal relaxation time. Skin friction is strongly reduced with increasing
values of nonlinear thermal and concentration convection variables. The simulations are relevant to nano-
polymer coating operations.

Citation

Beg, O., Nasir, M., Waqas, M., Kausar, M., & Zamri, N. (2022). Cattaneo-Christov dual diffusive non-Newtonian nanoliquid flow featuring nonlinear convection. Chinese Journal of Physics, https://doi.org/10.1016/j.cjph.2022.05.005

• Journal Article Type: Article
• Acceptance Date: May 8, 2022
• Online Publication Date: May 14, 2022
• Publication Date: May 14, 2022
• Deposit Date: May 26, 2022
• Publicly Available Date: May 15, 2024
• Journal: Chinese Journal Of Physics
• Print ISSN: 0577-9073
• Publisher: Elsevier
• DOI: https://doi.org/10.1016/j.cjph.2022.05.005
• Publisher URL: https://doi.org/10.1016/j.cjph.2022.05.005
• Related Public URLs: https://www.journals.elsevier.com/chinese-journal-of-physics/