Computation of melting dissipative magnetohydrodynamic nanofluid bioconvection with second order slip and variable thermophysical properties

Amirsom, NA; Uddin, MJ; Basir, MFM; Kadir, A; Beg, OA; Ismail, AIM

Abstract

This paper studies the combined effects of viscous dissipation, first and second order slip
and variable transport properties on phase-change hydromagnetic bio-nanofluid convection flow from a
stretching sheet. Nanoscale materials possess a much larger surface to volume ratio than bulk
materials which significantly modifies their thermodynamic and thermal properties and lowers
substantially the melting point. Gyrotactic non-magnetic micro-organisms are present in the
nanofluid. The transport properties are assumed to be dependent on the concentration and
temperature. Via appropriate similarity variables, the governing equation with boundary
conditions are converted to nonlinear ordinary differential equations and are solved using the
BVP4C subroutine in the symbolic software Matlab. The non-dimensional boundary value features
a melting (phase change) parameter, temperature-dependent thermal conductive parameter, first as
well as second order slip parameters, mass diffusivity parameter, Schmidt number, microorganism
diffusivity parameter, bioconvection Schmidt number, magnetic body force parameter, Brownian
motion and thermophoresis parameter. Extensive computations are visualized for the influence of
these parameters. The present simulation is of relevance in the fabrication of bio-nanomaterials for
bio-inspired fuel cells.

• Journal Article Type: Article
• Acceptance Date: Apr 1, 2019
• Online Publication Date: Jun 19, 2019
• Publication Date: Jun 19, 2019
• Deposit Date: Apr 2, 2019
• Publicly Available Date: Jul 11, 2019
• Journal: Applied Sciences
• Electronic ISSN: 2076-3417
• Publisher: MDPI
• Volume: 9
• Issue: 12
• Pages: 2493
• DOI: https://doi.org/10.3390/app9122493
• Publisher URL: https://doi.org/10.3390/app9122493
• Related Public URLs: https://www.mdpi.com/journal/applsci
• Additional Information: Funders : Universiti Sains Malaysia; Projects : Simulation of phase change magnetic nano-bio-coatings; Grant Number: 1001/PMATHS/8011013