The first and second law analyses of thermodynamics for CoFe2O4/H2O flow in a sudden expansion tube inserted elliptical dimpled fins

Pazarlıoğlu, Hayati Kadir; Gürsoy, Emrehan; Gürdal, Mehmet; Tekir, Mutlu; Gedik, Engin; Arslan, Kamil; Taşkesen, Edip

doi:10.1016/j.ijmecsci.2023.108144

Cited by 17 publications

(6 citation statements)

References 113 publications

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Section: Resultssupporting

confidence: 79%

“…Figure 7(c) explicitly presents the difference of top and bottom walls in terms of surface Nu distribution. According to the contours, the top wall releases more heat transfer than the bottom wall for judging by the entire tube, and this result presents similarity with the data in the study of Pazarlıo glu et al (2023aPazarlıo glu et al ( , 2023b. Investigation of the PEC presents the applicability and feasibility of the designed thermal system (Pazarlıo glu et al, 2023a(Pazarlıo glu et al, , 2023b.…”

Section: Source: Figure By Authorssupporting

confidence: 72%

“…7 According to the contours, the top wall realizes more heat transfer than the bottom wall for judging by the entire tube and this result presents similarity with the data in Ref. [49]. Investigation of the PEC presents the applicability and feasibility of the designed thermal system.…”

Section: Effect Of Dimple Fin and Ferrofluid On Heat Transfer And Flo...supporting

confidence: 68%

“…According to the contours, the top wall releases more heat transfer than the bottom wall for judging by the entire tube, and this result presents similarity with the data in the study of Pazarlıo glu et al (2023aPazarlıo glu et al ( , 2023b. Investigation of the PEC presents the applicability and feasibility of the designed thermal system (Pazarlıo glu et al, 2023a(Pazarlıo glu et al, , 2023b. Within the scope of this concept, the PEC results have been presented in Figure 8 to exhibit the THP.…”

Section: Source: Figure By Authorssupporting

confidence: 66%

“…Pazarlıoğlu et al. (2023a, 2023b) conducted a numerical investigation on SET , which was developed by adding elliptical DFs . In this study, different configuration of elliptical DFs (horizontal and vertical) with the aspect ratio of 0.5 was investigated.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of magneto-convection characteristics in a sudden expanding channel with convex surface geometry under thermally developing flow conditions

Gürsoy,

Pazarlioğlu,

Gürdal

et al. 2024

HFF

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Purpose The purpose of this study is to analyse the magnetic field effect on Fe3O4/H2O Ferrofluid flowing in a sudden expansion tube, which has specific behaviour in terms of rheology, with convex dimple fins. Because the investigation of flow separation is a prominent application in performance, the effect of magnetic field and convex dimple on the thermo-hydraulic performance of sudden expansion tube are examined, in detail. Design/methodology/approach During the solution of the boundary conditions of the sudden expansion tube, finite volume method was used. Analyses have been conducted considering the single-phase solution, steady-state, incompressible fluid and no-slip condition of the wall under forced convection conditions. In the analyses, it has been assumed that the flow was developing thermally and has been fully developed hydrodynamically. Findings The present study focuses on exploring the influence of the magnetic field, nanofluid concentration and convex dimple fins on the thermo-hydraulic performance of sudden expansion tube. The results indicate that the strength of the magnetic field, nanofluid concentration and convex dimple fins have a positive effect on the convective heat transfer in the system. Originality/value The authors conducted numerical studies, determining through a literature search that no one had yet investigated enhancing heat transfer on a sudden expansion tube using combinations of magnetic fields, nanofluids and convex dimple fins. The results of the numerical analyses provide valuable information about the improvement of heat transfer and system performance in electronic device cooling and heat exchangers.

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Section: Resultssupporting

confidence: 79%

Section: Source: Figure By Authorssupporting

confidence: 72%

Section: Effect Of Dimple Fin and Ferrofluid On Heat Transfer And Flo...supporting

confidence: 68%

Section: Source: Figure By Authorssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Investigation of magneto-convection characteristics in a sudden expanding channel with convex surface geometry under thermally developing flow conditions

Gürsoy,

Pazarlioğlu,

Gürdal

et al. 2024

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Employing nonuniform magnetic fields to improve energy transfer of flow after a sudden expansion inside a miniature channel: A hydrothermal study

Bahrami,

Ghaedi,

Attarzadeh

2024

Engineering Reports

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This study aims to use single/multiple dipoles to control the flow field after a two‐dimensional milli channel, including a sudden expansion. The study is done numerically and using a finite volume based software. First, a single dipole is positioned under the lower boundary of the channel located after the step (which is heated), and the influences of the different locations of the dipole under the heat transfer and pressure drop are analyzed. The same analysis is done for a dipole located on the opposite wall. The results show that the best performance is achieved when the dipole is located under the heated wall, where it enhances local heat transfer by 700%. The study also reveals that when multiple dipoles are used in the domain, some enhancement happens in the local Nusselt number, but the resulting pressure loss is so high. For example, when three dipoles are used, the local heat transfer enhances by 15% in specific places, but the pressure drop increases by five times. The higher strength of the dipoles also results in a much higher pressure drop. Also, the study of the inlet flow Reynolds number shows that magnetic effects on the flow decrease as the Reynolds number rises.

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Numerical investigation of entropy generation of turbulent ﬂow in twisted tri-lobed tubes

Liu,

Che,

Fang

et al. 2023

Case Studies in Thermal Engineering

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The first and second law analyses of thermodynamics for CoFe2O4/H2O flow in a sudden expansion tube inserted elliptical dimpled fins

Cited by 17 publications

References 113 publications

Investigation of magneto-convection characteristics in a sudden expanding channel with convex surface geometry under thermally developing flow conditions

Investigation of magneto-convection characteristics in a sudden expanding channel with convex surface geometry under thermally developing flow conditions

Employing nonuniform magnetic fields to improve energy transfer of flow after a sudden expansion inside a miniature channel: A hydrothermal study

Numerical investigation of entropy generation of turbulent ﬂow in twisted tri-lobed tubes

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