scholarly journals Bioconvection in Cross Nano-Materials with Magnetic Dipole Impacted by Activation Energy, Thermal Radiation, and Second Order Slip

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1019
Author(s):  
Zahra Abdelmalek ◽  
Kamel Al-Khaled ◽  
Hassan Waqas ◽  
A. Aldabesh ◽  
Sami Ullah Khan ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Radiation ◽  
Magnetic Dipole ◽  
Second Order ◽  
Nonlinear Thermal Radiation ◽  
Nano Materials ◽  
Flow Equations ◽  
Radiation Activation ◽  
Magnetic Nanomaterial ◽  
Gyrotactic Microorganism

Ferro liquids derive their magneto–viscous behavior from the suspended magnetic nanomaterial that enables tunable changes in temperature, as well as nano-structured fluid characteristics. A theoretical model that depicts the bioconvection flow of cross nanofluid with a magnetic dipole subjected to a cylindrical surface was developed and numerically solved. The model encountered nonlinear thermal radiation, activation energy, and second order slip. The flow equations were reduced and are presented in dimensionless forms, and they were solved numerically using the shooting technique, which is a built-in feature of MatLab. The model encountered symmetrical constraints for predicting velocity, temperature, concentration, and gyrotactic microorganism distribution and profiles. Moreover, the numerical values were computed for local Nusselt number, local Sherwood number, and motile density number against each physical parameter.

A higher order slip flow of generalized Micropolar nanofluid with applications of motile microorganisms, nonlinear thermal radiation and activation energy

2021 ◽  
pp. 2150095
Author(s):  
Usman ◽  
M. Ijaz Khan ◽  
Sami Ullah Khan ◽  
Abuzar Ghaffari ◽  
Yu-Ming Chu ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Radiation ◽  
Micropolar Fluid ◽  
Fluid Model ◽  
Slip Flow ◽  
Higher Order ◽  
Nonlinear Thermal Radiation ◽  
Coupled Equations ◽  
Flow Parameters ◽  
Micropolar Nanofluid

This communication aims to develop the thermal flow model for generalized micropolar nanofluid with insensitive applications of bioconvection, activation energy and nonlinear thermal radiation. The generalized micropolar fluid model is the extension of traditional micropolar fluid model with viscoelastic relations. The viscous nature of non-Newtonian micropolar material can be successfully predicted with help of this model. The motivating idea for considering the motile microorganisms is to control the nanoparticles suspension effectively. The higher order slip relations are incorporated to examine the bio-convective phenomenon. The simplified coupled equations in terms of non-dimensional variables are numerically treated with shooting scheme. The reliable graphical outcomes are presented for flow parameters governed to the transported problem. The flow pattern of each parameter is highlighted in view of viscous nature of micropolar fluid.

scholarly journals Nanomechanical Concepts in Magnetically Guided Systems to Investigate the Magnetic Dipole Effect on Ferromagnetic Flow Past a Vertical Cone Surface

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1129
Author(s):  
Auwalu Hamisu Usman ◽  
Zahir Shah ◽  
Poom Kumam ◽  
Waris Khan ◽  
Usa Wannasingha Humphries
Keyword(s):  
Magnetic Dipole ◽  
Chemical Reaction ◽  
Darcy Law ◽  
Nonlinear Thermal Radiation ◽  
Vertical Cone ◽  
Temperature Changes ◽  
Analysis Technique ◽  
Homotopy Analysis ◽  
Magnetic Nanomaterial ◽  
Cone Surface

Because of the floating magnetic nanomaterial, ferrofluids have magneto-viscous properties, enabling controllable temperature changes as well as nano-structured fluid characteristics. The study’s purpose is to evolve and solve a theoretical model of bioconvection nanofluid flow with a magnetic dipole effect in the presence of Curie temperature and using the Forchheimer-extended Darcy law subjected to a vertical cone surface. The model also includes the nonlinear thermal radiation, heat suction/injection, viscous dissipation, and chemical reaction effects. The developed model problem is transformed into nonlinear ordinary differentials, which have been solved using the homotopy analysis technique. In this problem, the behavior of function profiles are graphically depicted and explained for a variety of key parameters. For a given set of parameters, tables representthe expected numerical values and behaviors of physical quantities. The nanofluid velocity decreases as the ferrohydrodynamic, local inertia, and porosity parameters increase and decrease when the bioconvection Rayleigh number increases. Many key parameters improved the thermal boundary layer and temperature. The concentration is low when the chemical reaction parameter and Schmidt number rises. Furthermore, as the bioconvection constant, Peclet and Lewis numbers rise, so does the density of motile microorganisms.

Bioconvection assessment in Maxwell nanofluid configured by a Riga surface with nonlinear thermal radiation and activation energy

2020 ◽  
Vol 21 ◽  
pp. 100749 ◽  
Author(s):  
Katta Ramesh ◽  
Sami Ullah Khan ◽  
Mohammed Jameel ◽  
M. Ijaz Khan ◽  
Yu-Ming Chu ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Radiation ◽  
Nonlinear Thermal Radiation ◽  
Maxwell Nanofluid

Effects of Nonlinear Thermal Radiation and Thermo-Diffusion on MHD Carreau Fluid Flow Past a Stretching Surface with Slip

2017 ◽  
Vol 11 ◽  
pp. 57-71 ◽  
Author(s):  
Machireddy Gnaneswara Reddy ◽  
M.V.V.N.L. Sudha Rani ◽  
Oluwole Daniel Makinde
Keyword(s):  
Thermal Conductivity ◽  
Thermal Radiation ◽  
Variable Thermal Conductivity ◽  
Heat Transfer Analysis ◽  
Nonlinear Thermal Radiation ◽  
Stretching Surface ◽  
Flow Equations ◽  
Variable Approach ◽  
Opposite Behavior ◽  
Layer Flow

The boundary layer flow of a heat transfer analysis on Carreau hydro magnetic fluid past a convectively nonlinear stretching surface analyzed. The nonlinear radiation, variable thermal conductivity and thermo diffusion effects are included in energy and species governing equations. The set of dimensionless integrated ordinary differential equations under the boundary restrictions obtained with the help of suitable similarity variable approach. The reduced governing flow equations with the boundary conditions are resolved numerically. Comparisons present results with existing literature and yields nice agreement .The description of results has been analyzed for the flow controlling embedded pertinent parameters by utilizing the plots and tables. It is revealed that energy distribution decays for enhancing values of variable thermal conductivity parameter whereas the opposite behavior to the thermal radiation parameter. The non-dimensional concentration boosts with the ascending values of Soret number.

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