https://doi.org/10.1140/epjp/s13360-022-03434-8
Regular Article
Arrhenius activated energy impacts on irreversibility optimization due to unsteady stagnation point flow of radiative Casson nanofluids
1
Department of Mathematics, Faculty of Science, King Khalid University, 62529, Abha, Saudi Arabia
2
Department of Mathematics, Faculty of Science, South Valley University, 83523, Qena, Egypt
3
Department of Mathematics, College of Science and Arts, Qassim University, Al Mithnab, Saudi Arabia
4
Department of Mathematics and Computer Science, Faculty of Science, Port Said University, Port Said, Egypt
5
Department of Mathematics, Faculty of Science, Zagazig University, Zagazig, Egypt
Received:
8
February
2022
Accepted:
26
October
2022
Published online:
8
November
2022
This paper aims to examine the influences of a binary chemical reaction and Arrhenius activated energy on the unsteady external flow with a stagnation point over a vertical stretched surface. The worked suspension is Casson non-Newtonian nanofluids, and two-phase nanofluid formulation is considered. Here, the nanoparticles near the surface are passively controlled, and the viscous dissipation and Joule heating impacts are assumed. Non-similar solutions are introduced and solved using Blottner technique based on finite difference method. It is focused on the system entropy, thickness of the thermal and mass boundary layers. The major findings show that the radiation parameter enhances the irreversibility owing to the heat transfer, and hence, the Bejan coefficient is rising. Also, the velocity ratio rising causes a diminishing in the skin friction coefficient.
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