scholarly journals IMPACT OF NON-DARCY MEDIUM ON MIXED CONVECTIVE FLOW TOWARDS A PLATE CONTAINING MICROPOLAR WATER-BASED TiO2 NANOMATERIAL WITH ENTROPY GENERATION

2020 ◽  
Vol 23 (1) ◽  
pp. 11-26 ◽  
Author(s):  
Aurang Zaib ◽  
Rizwan Ul Haq ◽  
Mohsen Sheikholeslami ◽  
Ali J. Chamkha ◽  
Mohammad Mehdi Rashidi
Keyword(s):  
Entropy Generation ◽  
Convective Flow ◽  
Water Based ◽  
Mixed Convective Flow

Impact of partial slip on mixed convective flow towards a Riga plate comprising micropolar TiO2-kerosene/water nanoparticles

2019 ◽  
Vol 29 (5) ◽  
pp. 1647-1662 ◽  
Author(s):  
Aurang Zaib ◽  
Rizwan Ul Haq ◽  
Ali J. Chamkha ◽  
Mohammad Mehdi Rashidi
Keyword(s):  
Boundary Layer ◽  
Nusselt Number ◽  
Convective Flow ◽  
Design Methodology ◽  
Volume Fraction ◽  
Partial Slip ◽  
Content Type ◽  
Water Based ◽  
Riga Plate ◽  
Mixed Convective Flow

Purpose The purpose of this paper is to present an inclusive study of the mixed convective flow involving micropolar fluid holding kerosene/water-based TiO2 nanoparticle towards a vertical Riga surface with partial slip. The outcomes are confined for opposing and assisting flows. Design/methodology/approach Similarity equations are acquired and then worked out numerically by the Keller box technique. Findings Impacts of significant parameters on microrotation velocity, temperature distribution, velocity profile together with the Nusselt number and the skin friction are argued with the help of graphs. Two solutions are achieved in opposing flow, while the solution is unique in assisting flow. It is also monitored that the separation of boundary layer delays because of micropolar parameter and accelerates because of volume fraction. Originality/value The authors trust that all these results are new and significant for researchers.

Entropy generation minimisation: Nonlinear mixed convective flow of Sisko nanofluid

Pramana ◽  
2019 ◽  
Vol 93 (6) ◽  
Author(s):  
Tasawar Hayat ◽  
Faria Masood ◽  
Sumaira Qayyum ◽  
Ahmed Alsaedi
Keyword(s):  
Entropy Generation ◽  
Convective Flow ◽  
Mixed Convective Flow

Entropy Optimization in Nonlinear Mixed Convective Flow of Nanomaterials Through Porous Space

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tasawar Hayat ◽  
Ikram Ullah ◽  
Ahmad Alsaedi ◽  
Shaher Momani
Keyword(s):  
Convective Flow ◽  
Second Law Of Thermodynamics ◽  
Second Law ◽  
Porous Space ◽  
Arrhenius Activation Energy ◽  
Suction Parameter ◽  
Electrically Conducting ◽  
Entropy Optimization ◽  
Dimensionless Variables ◽  
Mixed Convective Flow

Abstract Our intention in this article is to investigate entropy optimization in nonlinear mixed convective unsteady magnetohydrodynamic flow of nanomaterials in porous space. An exponentially stretched sheet creates the liquid flow. Nanomaterial is considered electrically conducting. The concentration and energy expressions comprise viscous dissipation, Joule heating, thermophoresis and Brownian motion aspects. Arrhenius activation energy is considered. Computation of entropy generation based upon the second law of thermodynamics is made. Nonlinear partial expressions are obtained via suitable dimensionless variables. Resultant expressions are tackled by the OHAM technique. Features of numerous variables on entropy, temperature, velocity and concentration are graphically visualized. Skin friction and the temperature gradient at the surface are also elaborated. Comparative analysis is deliberated in tabulated form to validate the previously published outcomes. Velocity is reduced significantly via the suction parameter. The entropy rate increases for higher values of Brinkman, Biot and Hartmann numbers.

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