Energy analysis of magnetite nanofluid flowing in newly designed sudden expansion tube retrofitted with dimpled fin

Gürsoy, Emrehan; Pazarlıoğlu, Hayati Kadir; Dağdeviren, Abdullah; Gürdal, Mehmet; Gedik, Engin; Arslan, Kamil

doi:10.1016/j.ijheatmasstransfer.2022.123446

Cited by 22 publications

(7 citation statements)

References 58 publications

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“…The passive technique (Mousavi Ajarostaghi et al, 2022) provides an increase in the heat transfer by making structural changes such as addition of the extra equipment and using different heat transfer fluids. Researchers have generally focused on lots of ways such as twisted tapes (Gürsoy et al, 2022a(Gürsoy et al, , 2022b, baffles (El-Said et al, 2021), winglets (Promvonge et al, 2021), extended surfaces (Zaboli et al, 2021), porous materials (Chakravarty et al, 2021), coil inserts (Dinh et al, 2022), rough surfaces (Gürsoy et al, 2023), mono, hybrid and ternary nanofluids (Dezfulizadeh et al, 2022;Said et al, 2022;Sirine et al, 2022). For instance, rough surface, which includes dimpled fins (DFs), is one of the prominent passive techniques in the geometric improvement, and this phenomenon has been investigated by numerous researchers in the literature (Gürdal et al, 2022a(Gürdal et al, , 2022b(Gürdal et al, , 2022cSuri et al, 2022; Magnetoconvection characteristics Malapur et al, 2023) conducted a computational analyse on five different dimpled tubes (DT).…”

Section: Introductionmentioning

confidence: 99%

“…In fact, NFs have been examined together with DF in both experimental and numerical studies in the literature. Gürsoy et al (2022aGürsoy et al ( , 2022b theoretically analysed the THP of ferrofluid (FF) in a sudden expansion tube (SET) retrofitted with DF. The analyses have been performed under 100 # Re # 2000, q 00 ¼ 600 W/m 2 , and 1.0% # w # 2.0%.…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have generally focused on lots of ways such as twisted tapes (Gürsoy et al. , 2022a, 2022b), baffles (El-Said et al. , 2021), winglets (Promvonge et al.…”

Section: Introductionmentioning

confidence: 99%

“…Gürsoy et al. (2022a, 2022b) theoretically analysed the THP of ferrofluid ( FF ) in a sudden expansion tube ( SET ) retrofitted with DF . The analyses have been performed under 100 ≤ Re ≤ 2000, q″ = 600 W/m 2 , and 1.0 % ≤ φ ≤ 2.0 % .…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Researchers have generally focused on lots of ways such as twisted tapes (Gürsoy et al. , 2022a, 2022b), baffles (El-Said et al. , 2021), winglets (Promvonge et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 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

HFF

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“…In fact, NFs have been examined together with DF in both experimental and numerical studies in the literature. Gürsoy et al [16] theoretically analyzed the THP of ferrofluid (FF) in a sudden expansion tube (SET) retrofitted with DF. The analyses have been performed under 100≤Re≤2000, q"=600 W/m 2 , and 1.0%≤φ≤2.0%.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Magneto-Convection Characteristics in A Sudden Expanding Channel with Convex Surface Geometry Under Thermally Developing Flow Conditions

Gürsoy,

Pazarlıoğlu,

Gürdal

et al. 2023

Preprint

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The current study presents a novelty with focusing on the magnetic field effect on a sudden expansion tube with expansion ratio, total length, and pitch length of the dimpled fin is 2.5, 1500 mm, and 3.0, respectively. The magnetizable Fe3O4/H2O Ferrofluid with different nanoparticle volumetric concentrations (φ = 1.0% and 2.0%) were used as a heat transfer fluid, and magnetohydrodynamic effects were elaborately investigated in this study. The numerical analysis was conducted under laminar flow regime and the DC magnetic field (B0 = 0.03T, 0.05T, 0.3T, and 0.5T). The present study provided a comprehensive investigation, which presented the thermo-hydraulic performance of difference dimpled fins, Fe3O4/H2O Ferrofluid, and magnetic field. According to the results, dimple fins showed the best increment within heat transfer enhancement techniques. The heat transfer enhancement rate of the dimple tube and Fe3O4/H2O Ferrofluid were respectively acquired as 22.62% and 5.43%-6.28% (φ = 1.0% and 2.0%). When dimpled fin and Fe3O4/H2O Ferrofluid were used, the increment in Performance Evaluation Criteria was calculated as 21.31% and 4.85%-9.79% (φ = 1.0% and 2.0%). Although the highest average Nusselt number was obtained at B0 = 0.5T, the highest performance evaluation criteria were detected at B0 = 0.3T due to the friction factor showing an increment.

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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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Energy analysis of magnetite nanofluid flowing in newly designed sudden expansion tube retrofitted with dimpled fin

Cited by 22 publications

References 58 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

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

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