Numerical and machine learning analyses of entropy generation in an unsteady squeezing flow of copper/aluminum oxide/water hybrid nanofluid

Heat Transfer ◽  
2021 ◽  
Author(s):  
Shina D. Oloniiju ◽  
Ibukun S. Oyelakin ◽  
Sicelo P. Goqo ◽  
Precious Sibanda
Keyword(s):  
Machine Learning ◽  
Aluminum Oxide ◽  
Entropy Generation ◽  
Squeezing Flow ◽  
Hybrid Nanofluid ◽  
Copper Aluminum Oxide ◽  
Copper Aluminum

Computational analysis of nanofluid and hybrid nanofluid in Darcy’s squeezing flow with entropy optimization

2019 ◽  
Vol 29 (9) ◽  
pp. 3394-3416 ◽  
Author(s):  
Muhammad Ijaz Khan ◽  
Ahmed Alsaedi ◽  
Salman Ahmad ◽  
Tasawar Hayat
Keyword(s):  
Skin Friction ◽  
Entropy Generation ◽  
Variable Temperature ◽  
Entropy Generation Rate ◽  
Squeezing Flow ◽  
Hybrid Nanofluid ◽  
Bejan Number ◽  
Porous Space ◽  
Suction Parameter ◽  
Content Type

Purpose This paper aims to examine squeezing flow of hybrid nanofluid inside the two parallel rotating sheets. The upper sheet squeezes downward, whereas the lower sheet stretches. Darcy’s relation describes porous space. Hybrid nanofluid consists of copper (Cu) and titanium oxide (TiO2) nanoparticles and water (H2O). Viscous dissipation and thermal radiation in modeling are entertained. Entropy generation analysis is examined. Design/methodology/approach Transformation procedure is implemented for conversion of partial differential systems into an ordinary one. The shooting scheme computes numerical solution. Findings Velocity, temperature, Bejan number, entropy generation rate, skin friction and Nusselt number are discussed. Key results are mentioned. Velocity field increases vs higher estimations of squeezing parameter, while it declines via larger porosity variable. Temperature of liquid particles enhances vs larger Eckert number. It is also examined that temperature field dominates for TiO2-H2O, Cu-H2O and Cu-TiO2-H2O. Magnitude of heat transfer rate and skin friction coefficient increase against higher squeezing parameter, radiative parameter, porosity variable and suction parameter. Originality/value The originality of this paper is investigation of three-dimensional time-dependent squeezing flow of hybrid nanomaterial between two parallel sheets. To the best of the authors’ knowledge, no such consideration has been carried out in the literature.

p-Type copper aluminum oxide thin films for gas-sensing applications

2015 ◽  
Vol 209 ◽  
pp. 287-296 ◽  
Author(s):  
C. Baratto ◽  
R. Kumar ◽  
G. Faglia ◽  
K. Vojisavljević ◽  
B. Malič
Keyword(s):  
Thin Films ◽  
Aluminum Oxide ◽  
Gas Sensing ◽  
Oxide Thin Films ◽  
Sensing Applications ◽  
Copper Aluminum Oxide ◽  
Copper Aluminum ◽  
P Type
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