Significance of non-Fourier heat flux and radiation on PEG – Water based hybrid Nanofluid flow among revolving disks with chemical reaction and entropy generation optimization

The present study reveals the behavior of shear-thickening and shear-thinning fluids in magnetohydrodynamic flow comprising the significant impact of a hybrid nanofluid over a porous radially shrinking/stretching disc. The features of physical properties of water-based Ag/TiO2 hybrid nanofluid are examined. The leading flow problem is formulated initially in the requisite form of PDEs (partial differential equations) and then altered into a system of dimensionless ODEs (ordinary differential equations) by employing suitable variables. The renovated dimensionless ODEs are numerically resolved using the package of boundary value problem of fourth-order (bvp4c) available in the MATLAB software. The non-uniqueness of the results for the various pertaining parameters is discussed. There is a significant enhancement in the rate of heat transfer, approximately 13.2%, when the impact of suction governs about 10% in the boundary layer. Therefore, the heat transport rate and the thermal conductivity are greater for the new type of hybrid nanofluid compared with ordinary fluid. The bifurcation of the solutions takes place in the problem only for the shrinking case. Moreover, the sketches show that the nanoparticle volume fractions and the magnetic field delay the separation of the boundarylayer.

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Effect of Cattaneo – Christov heat flux on heat and mass transfer characteristics of Maxwell hybrid nanofluid flow over stretching/shrinking sheet

Physica Scripta ◽

10.1088/1402-4896/ac2f7d ◽

2021 ◽

Author(s):

P. Sudarsana Reddy ◽

P Sreedevi

Keyword(s):

Mass Transfer ◽

Heat Flux ◽

Heat And Mass Transfer ◽

Shrinking Sheet ◽

Hybrid Nanofluid ◽

Nanofluid Flow ◽

Transfer Characteristics

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Impact of heated obstacle position on magneto-hybrid nanofluid flow in a lid-driven porous cavity with Cattaneo-Christov heat flux pattern

Alexandria Engineering Journal ◽

10.1016/j.aej.2020.10.011 ◽

2021 ◽

Vol 60 (1) ◽

pp. 821-835

Author(s):

Shaik Jakeer ◽

P. BalaAnki Reddy ◽

A.M. Rashad ◽

Hossam A. Nabwey

Keyword(s):

Heat Flux ◽

Hybrid Nanofluid ◽

Nanofluid Flow ◽

Porous Cavity

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Hybrid nanofluid flow and heat transfer past a vertical thin needle with prescribed surface heat flux

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-04-2019-0277 ◽

2019 ◽

Vol 29 (12) ◽

pp. 4875-4894 ◽

Cited By ~ 23

Author(s):

Iskandar Waini ◽

Anuar Ishak ◽

Ioan Pop

Keyword(s):

Heat Transfer ◽

Heat Flux ◽

Surface Heat Flux ◽

Surface Heat ◽

Dual Solutions ◽

Hybrid Nanofluid ◽

Nanofluid Flow ◽

Needle Size ◽

Content Type ◽

Flow And Heat Transfer

Purpose The purpose of this paper is to study the steady mixed convection hybrid nanofluid flow and heat transfer past a vertical thin needle with prescribed surface heat flux. Design/methodology/approach The governing partial differential equations are transformed into a set of ordinary differential equations by using a similarity transformation. The transformed equations are then solved numerically using the boundary value problem solver (bvp4c) in Matlab software. The features of the skin friction coefficient and the local Nusselt number as well as the velocity and temperature profiles for different values of the governing parameters are analyzed and discussed. Findings It is found that dual solutions exist for a certain range of the mixed convection parameter where its critical values decrease with the increasing of the copper (Cu) nanoparticle volume fractions and for the smaller needle size. It is also observed that the increasing of the copper (Cu) nanoparticle volume fractions and the decreasing of the needle size tend to enhance the skin friction coefficient and the local Nusselt number on the needle surface. A temporal stability analysis is performed to determine the stability of the dual solutions in the long run, and it is revealed that only one of them is stable, while the other is unstable. Originality/value The problem of hybrid nanofluid flow and heat transfer past a vertical thin needle with prescribed surface heat flux is the important originality of the present study where the dual solutions for the opposing flow are obtained.

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Influence of heat generation/absorption and stagnation point on polystyrene–TiO2/H2O hybrid nanofluid flow

Scientific Reports ◽

10.1038/s41598-021-01747-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Sadaf Masood ◽

Muhammad Farooq ◽

Aisha Anjum

Keyword(s):

Heat Transfer ◽

Differential Equations ◽

Stagnation Point ◽

Entropy Generation ◽

Heat Generation ◽

Velocity Ratio ◽

Hybrid Nanofluid ◽

Engineering System ◽

Nanofluid Flow ◽

Homotopy Analysis

AbstractThis article focuses on hybrid nanofluid flow induced by stretched surface. The present context covers stagnation point flow of a hybrid nanofluid with the effect of heat generation/absorption. Currently most famous class of nanofluids is Hybrid nanofluid. It contains polystyrene and titanium oxide as a nanoparticles and water as a base fluid. First time attributes of heat transfer are evaluated by utilizing polystyrene–TiO2/H2O hybrid nanofluid with heat generation/absorption. Partial differential equations are converted into ordinary differential equation by using appropriate transformations for heat and velocity. Homotopy analysis method is operated for solution of ordinary differential equations. Flow and heat are disclosed graphically for unlike parameters. Resistive force and heat transfer rate is deliberated mathematically and graphically. It is deduced that velocity field enhanced for velocity ratio parameter whereas temperature field grows for heat generation/absorption coefficient. To judge the production of any engineering system entropy generation is also calculated. It is noticed that entropy generation grows for Prandtl number and Eckert number while it shows opposite behavior for temperature difference parameter.

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