Comment on the paper “Entropy generation in nanofluid flow of Walters‐B fluid with homogeneous‐heterogeneous reactions, Sumaira Qayyum, Tasawar Hayat, Sumaira Jabeen, Ahmed Alsaedi, Mathematical Methods in the Applied Sciences 2020, 43: 5657–5672”

2020 ◽  
Author(s):  
Asterios Pantokratoras
Keyword(s):  
Applied Sciences ◽  
Entropy Generation ◽  
Heterogeneous Reactions ◽  
Mathematical Methods ◽  
Nanofluid Flow ◽  
Walters B Fluid

Entropy generation in nanofluid flow of Walters‐B fluid with homogeneous‐heterogeneous reactions

2020 ◽  
Vol 43 (9) ◽  
pp. 5657-5672 ◽  
Author(s):  
Sumaira Qayyum ◽  
Tasawar Hayat ◽  
Sumaira Jabeen ◽  
Ahmed Alsaedi
Keyword(s):  
Entropy Generation ◽  
Heterogeneous Reactions ◽  
Nanofluid Flow ◽  
Walters B Fluid

Hybrid nanofluid flow over a stretched cylinder with the impact of homogeneous–heterogeneous reactions and Cattaneo–Christov heat flux: Series solution and numerical simulation

Heat Transfer ◽  
2021 ◽  
Author(s):  
Anthonysamy John Christopher ◽  
Nanjundan Magesh ◽  
Ramanahalli Jayadevamurthy Punith Gowda ◽  
Rangaswamy Naveen Kumar ◽  
Ravikumar Shashikala Varun Kumar
Keyword(s):  
Numerical Simulation ◽  
Heat Flux ◽  
Series Solution ◽  
Heterogeneous Reactions ◽  
Hybrid Nanofluid ◽  
Nanofluid Flow ◽  
The Impact

scholarly journals Analysis of entropy generation in a power-law nanofluid flow over a stretchable rotatory porous disk

2021 ◽  
Vol 28 ◽  
pp. 101370 ◽  
Author(s):  
Usman ◽  
Abuzar Ghaffari ◽  
Irfan Mustafa ◽  
Taseer Muhammad ◽  
Yasir Altaf
Keyword(s):  
Entropy Generation ◽  
Power Law ◽  
Porous Disk ◽  
Nanofluid Flow ◽  
Power Law Nanofluid

scholarly journals Non-Newtonian effect on heat transfer and entropy generation of natural convection nanofluid flow inside a vertical wavy porous cavity

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Mahbuba Tasmin ◽  
Preetom Nag ◽  
Zarin T. Hoque ◽  
Md. Mamun Molla
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Entropy Generation ◽  
Power Law ◽  
Volume Fraction ◽  
Local Entropy ◽  
Nanofluid Flow ◽  
Porosity Level ◽  
Power Law Index ◽  
Local Entropy Generation

AbstractA numerical study on heat transfer and entropy generation in natural convection of non-Newtonian nanofluid flow has been explored within a differentially heated two-dimensional wavy porous cavity. In the present study, copper (Cu)–water nanofluid is considered for the investigation where the specific behavior of Cu nanoparticles in water is considered to behave as non-Newtonian based on previously established experimental results. The power-law model and the Brinkman-extended Darcy model has been used to characterize the non-Newtonian porous medium. The governing equations of the flow are solved using the finite volume method with the collocated grid arrangement. Numerical results are presented through streamlines, isotherms, local Nusselt number and entropy generation rate to study the effects of a range of Darcy number (Da), volume fractions (ϕ) of nanofluids, Rayleigh numbers (Ra), and the power-law index (n). Results show that the rate of heat transfer from the wavy wall to the medium becomes enhanced by decreasing the power-law index but increasing the volume fraction of nanoparticles. Increase of porosity level and buoyancy forces of the medium augments flow strength and results in a thinner boundary layer within the cavity. At negligible porosity level of the enclosure, effect of volume fraction of nanoparticles over thermal conductivity of the nanofluids is imperceptible. Interestingly, when the Darcy–Rayleigh number $$Ra^*\gg 10$$ R a ∗ ≫ 10 , the power-law effect becomes more significant than the volume fraction effect in the augmentation of the convective heat transfer process. The local entropy generation is highly dominated by heat transfer irreversibility within the porous enclosure for all conditions of the flow medium. The particular wavy shape of the cavity strongly influences the heat transfer flow pattern and local entropy generation. Interestingly, contour graphs of local entropy generation and local Bejan number show a rotationally symmetric pattern of order two about the center of the wavy cavity.

Entropy Generation in Magneto-Nanofluid Flow Between Two Coaxial Cylinders by Using A New I-ADM Technique

2021 ◽  
Author(s):  
Nawel Benaziza ◽  
Mohamed K. Nacereddine ◽  
Mohamed Kezzar ◽  
Mohamed R. Sari ◽  
Kamel Khounfais ◽  
...  
Keyword(s):  
Entropy Generation ◽  
Nanofluid Flow ◽  
Coaxial Cylinders
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