MHD mixed convection of nanofluids in the presence of multiple rotating cylinders in different configurations: A two-phase numerical study

Garmroodi, M.R. Daneshvar; Ahmadpour, Ali; Talati, Faramarz

doi:10.1016/j.ijmecsci.2018.10.037

Cited by 49 publications

(5 citation statements)

References 38 publications

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“…There exist studies that consider the convection for flow over multiple CCs in confined spaces. Garmroodi et al [3] used multiple CCs in a lid-driven enclosure as mixed convection problem under magnetic field (MGF). They considered different arrangement of the CCs while the vertical one provided the highest HT rates.…”

Section: Introductionmentioning

confidence: 99%

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Selimefendigil,

Ghachem,

Albalawi

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Selimefendigil,

Ghachem,

Albalawi

et al. 2024

Heliyon

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“…Daneshvar Garmroodi et al 28 numerically studied MHD mixed convection of nanofluids in the presence of multiple rotating cylinders in different configurations. The better convective heat transfer was obtained when two cylinders are vertical arrangementc at low Hartmann numbers.…”

Section: Introductionmentioning

confidence: 99%

Study on natural convection heat transfer in a closed cavity with hot and cold tubes

Zheng

Zhang

et al. 2021

Science Progress

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Laminar natural convection with a pair of hot and cold tube in a closed cubic cavity is carried out. This configuration can be founded in performance of nuclear power plant containment passive residual heat removal system. The basic government aquations are sloved by means of finite volume method. The effect of Ra number (103–106), shape of tube and spatial position on local and mean heat transfer characteristics is studied. It is found that the Nu number increased when raising Ra number. The Nu number is higher when the shapes are circle and triangle. In adddition, it is founded that the heat transfer has a better effect when the cold tube locates above the hot tube among the five spatial positions. The results provides theoretical basis for performance of nuclear power plant containment passive residual heat removal system.

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“…Although, there are several works presented in this subject but most of them considered regular flow domains; (Jasim et al , 2021; Ali et al , 2020; Selimefendigil and Öztop, 2020; Turan et al , 2020; Quaresma et al , 2020). In addition to these works, (Daneshvar Garmroodi et al , 2019) carried out the mixed convective process in a square enclosure filled with nanofluids. They assumed that there are two-rotating cylinders within the flow domain and all the boundaries are regular.…”

Section: Introductionmentioning

confidence: 99%

MHD convective process due to rotation of cylinders and movement of a wavy wall of two-sided wavy enclosures with radiation

Ahmed

Alhazmi

2021

HFF

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Purpose This paper aims to study the mixed convective process due to various dynamics, namely, inner rotating cylinders and upper-wavy wall movement for the first time. Design/methodology/approach The Galerkin finite element method together with the characteristic-based split scheme is applied to solve the governing system. Findings The main outcomes revealed that the direction of the rotation of the cylinders, radius and locations of the rotating shapes are beneficial controlling elements for the enhancement of heat transfer. Also, for all the considered cases, values of the Bejan number indicate that the fluid friction irreversibility is dominance compared to the heat transfer irreversibility. Further, average values of the heat transfer entropy, fluid friction entropy and total entropy are minimized in the case of fixed cylinders regardless of the cylinder radius. Originality/value The authors are interested in the mixed convection case due to regular boundaries and hence this simulation purposes a first attempt to examine the mixed convective flow due to irregular wavy boundaries. This study considered various dynamics, namely, inner rotating cylinders and wavy-lid driven wall which makes it more attractive to the readers. Various cases based on radius of the cylinder and direction of the rotations together with several locations of the rotating shapes are taken into account which makes the current simulation is comprehensive. Various studies presented in this field are made by commercial software and these treatments need special conditions (having limitation) but the current solution methodology is based on a finite element method home-code. Various important impacts, are, also, examined, namely, inclined geometry, inclined magnetic field, thermal radiation and heat generation/absorption. The entropy of the current complex system is analyzed based on the second law of thermodynamics.

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MHD mixed convection of nanofluids in the presence of multiple rotating cylinders in different configurations: A two-phase numerical study

Cited by 49 publications

References 38 publications

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Study on natural convection heat transfer in a closed cavity with hot and cold tubes

MHD convective process due to rotation of cylinders and movement of a wavy wall of two-sided wavy enclosures with radiation

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