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Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis

The present study attempts to analyze the unsteady flow over a rotating disk in a hybrid nanofluid with suction and deceleration effects. The partial derivatives of multivariable differential equations are converted to ordinary differential equations using appropriate transformations. The bvp4c func...

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Main Authors: Pop, Ioan Mihai, Waini, Iskandar, Ishak, Anuar
Format: Article
Language:English
Published: Elsevier Ltd 2022
Online Access:http://eprints.utem.edu.my/id/eprint/26301/2/WAINI2022%20EJMFB%20ROTATING%20DISK.PDF
http://eprints.utem.edu.my/id/eprint/26301/
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spelling my.utem.eprints.263012023-02-23T16:20:57Z http://eprints.utem.edu.my/id/eprint/26301/ Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis Pop, Ioan Mihai Waini, Iskandar Ishak, Anuar The present study attempts to analyze the unsteady flow over a rotating disk in a hybrid nanofluid with suction and deceleration effects. The partial derivatives of multivariable differential equations are converted to ordinary differential equations using appropriate transformations. The bvp4c function in MATLAB software is employed to solve the mathematical model. The outcomes show that multiple solutions are verifiable in certain operating parameters. The stability of the multiple solutions over time is investigated. It is discovered that the first and the second solutions are stable and physically relevant, whereas the third solution is unstable as time evolves. Moreover, the stronger deceleration contributes to enhancing the skin friction coefficient in the radial direction Rer1/2Cf and in the azimuthal direction Rer1/2Cg, for the first and third solutions whereas the second solution reduces. The values of Rer1/2Cf and Rer1/2Cg for the third solution enhance in the presence of suction, while the opposite behaviors​ are observed for the first and second solutions. The enhancement of the local Nusselt number Rer−1/2Nur on all solutions is noticed with the imposition of suction on the surface and stronger deceleration strength. Elsevier Ltd 2022-03-04 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/26301/2/WAINI2022%20EJMFB%20ROTATING%20DISK.PDF Pop, Ioan Mihai and Waini, Iskandar and Ishak, Anuar (2022) Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis. European Journal of Mechanics / B Fluids, 94. pp. 121-127. ISSN 0997-7546 https://reader.elsevier.com/reader/sd/pii/S0997754622000358?token=BE2256D52B30FA886052E1984C2423DA3CD64ABE5C72050478BC36955565A962ECEB474D4C60400AA793EEF037248ECB&originRegion=eu-west-1&originCreation=20230213051855 10.1016/j.euromechflu.2022.02.011
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
description The present study attempts to analyze the unsteady flow over a rotating disk in a hybrid nanofluid with suction and deceleration effects. The partial derivatives of multivariable differential equations are converted to ordinary differential equations using appropriate transformations. The bvp4c function in MATLAB software is employed to solve the mathematical model. The outcomes show that multiple solutions are verifiable in certain operating parameters. The stability of the multiple solutions over time is investigated. It is discovered that the first and the second solutions are stable and physically relevant, whereas the third solution is unstable as time evolves. Moreover, the stronger deceleration contributes to enhancing the skin friction coefficient in the radial direction Rer1/2Cf and in the azimuthal direction Rer1/2Cg, for the first and third solutions whereas the second solution reduces. The values of Rer1/2Cf and Rer1/2Cg for the third solution enhance in the presence of suction, while the opposite behaviors​ are observed for the first and second solutions. The enhancement of the local Nusselt number Rer−1/2Nur on all solutions is noticed with the imposition of suction on the surface and stronger deceleration strength.
format Article
author Pop, Ioan Mihai
Waini, Iskandar
Ishak, Anuar
spellingShingle Pop, Ioan Mihai
Waini, Iskandar
Ishak, Anuar
Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
author_facet Pop, Ioan Mihai
Waini, Iskandar
Ishak, Anuar
author_sort Pop, Ioan Mihai
title Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
title_short Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
title_full Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
title_fullStr Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
title_full_unstemmed Multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
title_sort multiple solutions of the unsteady hybrid nanofluid flow over a rotating disk with stability analysis
publisher Elsevier Ltd
publishDate 2022
url http://eprints.utem.edu.my/id/eprint/26301/2/WAINI2022%20EJMFB%20ROTATING%20DISK.PDF
http://eprints.utem.edu.my/id/eprint/26301/
https://reader.elsevier.com/reader/sd/pii/S0997754622000358?token=BE2256D52B30FA886052E1984C2423DA3CD64ABE5C72050478BC36955565A962ECEB474D4C60400AA793EEF037248ECB&originRegion=eu-west-1&originCreation=20230213051855
_version_ 1758953853631332352
score 13.211869

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