The present paper examines the temperature-dependent viscosity and thermal conductivity of a micropolar silver (

Thermal properties of most base fluids used in industry are low and do not address the needs of recent technology. Nowadays, effective active heat transfer methods like ultrasonic vibration have been explored by Delouei et al. [

Nanoparticles such as

The behaviour of a hybrid nanofluid composed of

It is known that many of the industrially and technologically important fluids are non-Newtonian fluids. In this article, a non-Newtonian micropolar fluid is considered. The most common type of non-Newtonian micropolar fluid is a fluid with a micro-structure that may consist of rigid, randomly oriented particles suspended in a viscous medium.

Motivated by the aforementioned works, the present study extends the work of Malik et al. [

Consider an inverted isothermal rotating cone with a semi-vertical angle of

Property | _{p} |
^{2}/s) |
||||
---|---|---|---|---|---|---|

H_{2}O |
4179 | 0.613 | 997.1 | 21 | 5.5 × |
1.47 × |

Ag | 235 | 429 | 10,500 | 5.4 | 8.1 × 10 |
147 × 10 |

MgO | 879 | 30 | 3970 | 3.36 | 8 × 10 |
95.3 × 10 |

According to Khan et al. [

Using

The nondimensional boundary conditions take the form:

The skin friction coefficient and local Nusselt number are defined as:

The corresponding non-dimensional form for

Numerical solutions to the non-dimensionalized system of

Using the

As mentioned earlier, the essence of the overlapping grid multidomain spectral quasilinearization is the slicing of the physical domain into a finite number of overlapping subintervals, the non-dimensional boundary conditions then become as written in

The linearized system of

The system of

Applying the pseudospectral method at the boundaries gives:

The

To begin the iterative search for approximate solutions, the following functions:

To check the validity of the current numerical scheme, a comparison of the present values of skin friction and Nusselt number with those published in the literature by Malik et al. [

Malik et al. [ |
Chamkha et al. [ |
Present | ||
---|---|---|---|---|

Pr | ||||

0.7 | 0 | 1.0253 | 1.0255 | 1.0254 |

0.7 | 1 | 2.2007 | 2012 | 2.2009 |

0.7 | 10 | 8.5041 | 8.5041 | 8.5042 |

0.7 | 0 | 0.4295 | 0.4299 | 0.4297 |

0.7 | 1 | 0.6121 | 0.6120 | 0.6121 |

0.7 | 10 | 1.0097 | 1.0097 | 1.0098 |

In

Rd | M | Ag/water | MgO/water | Ag-MgO/water |
---|---|---|---|---|

0 | 0.5 | 1.50654604 | 1.39400943 | 1.51055932 |

0.5 | 1.58714921 | 1.46925102 | 1.59134563 | |

1 | 1.64957488 | 1.52745004 | 1.65391613 | |

2 | 1.74335788 | 1.61476788 | 1.74792167 | |

0.7 | 0 | 1.58532802 | 1.45480453 | 1.58940010 |

0.5 | 1.62023049 | 1.48181063 | 1.61808768 | |

0.7 | 1.62688155 | 1.49413268 | 1.63123346 | |

1 | 1.64843646 | 1.51443667 | 1.65295380 |

Rd | M | Ag/water | MgO/water | Ag-MgO/water |
---|---|---|---|---|

0 | 0.5 | 1.59553867 | 1.59859185 | 1.59842638 |

0.5 | 2.17847585 | 2.16923979 | 2.18031405 | |

1 | 2.68706423 | 2.66710340 | 2.68806367 | |

2 | 3.56651381 | 3.52816566 | 3.56619957 | |

0.7 | 0 | 2.37393855 | 2.35357564 | 2.37532767 |

0.5 | 2.39255625 | 2.36863805 | 2.39063920 | |

0.7 | 2.39608230 | 2.37547258 | 2.39761170 | |

1 | 2.40746545 | 2.38668655 | 2.40907652 |

A numerical investigation for unsteady magneto micropolar

Micropolar fluid assists the secondary flow and diminishes the main flow. The water hybrid nanofluid,

The rotational effect for the hybrid nanofluid near the boundary is greater than that of the mono-nanofluid.

For the water hybrid nanofluid,

The variable viscosity parameter reduces the temperature for the hybrid nanofluid,

The porosity parameter decreases the main flow; however, the inclusion of the hybrid nanofluid

The authors would like to thank the anonymous reviewers for their valuable comments.

The authors received no specific funding for this study.

The authors confirm contribution to the paper as follows: conceptualisation: Mekonnen S. Ayano; writing original draft: Mekonnen S. Ayano; methodology, code writing: Thokozani N. Khumalo, Stephen T. Sikwila; Matlab code creation and validation: Mekonnen S. Ayano, Thokozani N. Khumalo, Stephen T. Sikwila; analysis and interpretation of results: Mekonnen S. Ayano, Stanford Shateyi; final manuscript preparation: Mekonnen S. Ayano, Stephen T. Sikwila; validation of results: Mekonnen S. Ayano, Stanford Shateyi. All authors reviewed the results and approved the final version of the manuscript.

The readers can contact the corresponding author and request the Matlab codes used to generate the data.

The authors declare that they have no conflicts of interest to report regarding the present study.

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