Simulation investigation of the oscillatory motion of two elliptic obstacles located within a quarter-circle cavity filled with Cu-Al2O3/water hybrid nanofluid

Article


Al-Srayyih, Basil Mahdi, AlManea, Ahmed, Saleh, Khalid, Abed, Azher M., Al-Amir, Qusay Rasheed, Hamzah, Hameed K., Ali, Farooq H., Al-Rbaihat, Raed and Alahmer, Ali. 2023. "Simulation investigation of the oscillatory motion of two elliptic obstacles located within a quarter-circle cavity filled with Cu-Al2O3/water hybrid nanofluid." Numerical Heat Transfer Part A: Applications. https://doi.org/10.1080/10407782.2023.2279248
Article Title

Simulation investigation of the oscillatory motion of two elliptic obstacles located within a quarter-circle cavity filled with Cu-Al2O3/water hybrid nanofluid

ERA Journal ID3804
Article CategoryArticle
AuthorsAl-Srayyih, Basil Mahdi, AlManea, Ahmed, Saleh, Khalid, Abed, Azher M., Al-Amir, Qusay Rasheed, Hamzah, Hameed K., Ali, Farooq H., Al-Rbaihat, Raed and Alahmer, Ali
Journal TitleNumerical Heat Transfer Part A: Applications
Number of Pages25
Year2023
PublisherTaylor & Francis
Place of PublicationUnited States
ISSN1040-7782
1521-0634
Digital Object Identifier (DOI)https://doi.org/10.1080/10407782.2023.2279248
Web Address (URL)https://www.tandfonline.com/doi/full/10.1080/10407782.2023.2279248
Abstract

This study investigates the consequences of introducing a pair of oscillating elliptical obstacles on the natural convection and entropy generation within a quarter-circle cavity that is filled with a water-based hybrid nanofluid. The Galerkin Finite Element Method was utilized to perform numerical simulations on a 2-dimensional cavity, where the outer wall was set to a low temperature and the inner wall was kept at a high temperature, while the other walls were adiabatic. The hybrid nanofluid containing Cu-Al2O3 nanoparticles was used. The impact of changes in the values of dimensionless parameters, such as the Rayleigh number, heated wall length, oscillation frequency, oscillation amplitude, and oscillation period, on the flow and heat transfer within the cavity was examined. Results showed that an increase in the length of the hot source resulted in a decrease in heat transfer rate and that increasing the Rayleigh number led to a significant increase in total entropy generation and heat transfer irreversibility. A drop in the average Bejan number was noted as the Rayleigh number increased, demonstrating the prevalence of entropy caused by fluid friction. The effect of changing the amplitude had a higher impact on the average Nusselt number compared to the frequency value. At low Rayleigh numbers, the average Nusselt number was higher when the elliptical obstacles oscillated in the same direction, while the opposite trend was observed at higher Rayleigh numbers.

KeywordsEntropy generation, Galerkin finite element method, hybrid nanofluid, natural convection, oscillated elliptical obstacles cavity
ANZSRC Field of Research 2020401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
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Byline AffiliationsUniversity of Babylon, Iraq
Al-Furat Al-Awsat Technical University, Iraq
School of Engineering
Al-Mustaqbal University College, Iraq
Tafila Technical University, Jordan
Tuskegee University, United States
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