Unsteady magnetohydrodynamics (mhd) flow of hybrid ferrofluid due to a rotating disk

Iskandar, Waini and Najiyah Safwa, Khashi’ie and Abdul Rahman, Mohd Kasim and Nurul Amira, Zainal and Khairum, Hamzah and Norihan, Md Arifin and Pop, Ioan (2022) Unsteady magnetohydrodynamics (mhd) flow of hybrid ferrofluid due to a rotating disk. Mathematics, 10 (10). pp. 1-20. ISSN 2227-7390. (Published)

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The flow of fluids over the boundaries of a rotating disc has many practical uses, including boundary-layer control and separation. Therefore, the aim of this study is to discuss the impact of unsteady magnetohydrodynamics (MHD) hybrid ferrofluid flow over a stretching/shrinking rotating disk. The time-dependent mathematical model is transformed into a set of ordinary differential equations (ODE's) by using similarity variables. The bvp4c method in the MATLAB platform is utilised in order to solve the present model. Since the occurrence of more than one solution is presentable, an analysis of solution stabilities is conducted. Both solutions were surprisingly found to be stable. Meanwhile, the skin friction coefficient, heat transfer rate—in cooperation with velocity— and temperature profile distributions are examined for the progressing parameters. The findings reveal that the unsteadiness parameter causes the boundary layer thickness of the velocity and temperature distribution profile to decrease. A higher value of magnetic and mass flux parameter lowers the skin friction coefficient. In contrast, the addition of the unsteadiness parameter yields a supportive effect on the heat transfer rate. An increment of the magnetic parameter up to 30% reduces the skin friction coefficient by 15.98% and enhances the heat transfer rate approximately up to 1.88%, significantly. In contrast, the heat transfer is rapidly enhanced by improving the mass flux parameter by almost 20%.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Hybrid ferrofluid; Magnetohydrodynamics; Rotating disk; Stability analysis; Unsteady flow
Subjects: Q Science > QA Mathematics
Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division: Center for Mathematical Science
Depositing User: Mr Muhamad Firdaus Janih@Jaini
Date Deposited: 09 Nov 2022 06:51
Last Modified: 15 Aug 2023 08:27
URI: http://umpir.ump.edu.my/id/eprint/34625
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