An innovative approach of alternating magnetic field diversified with different wave types and magnet positions for ferrofluid flow in dimpled tube

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

doi:10.1016/j.jmmm.2023.170975

Cited by 8 publications

(1 citation statement)

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“…An experimental study examines the forced magneto-convection of FeO2/H2O ferrofluid through dimpled tubes under an alternating magnetic field (ƒ = 5 Hz and B = 0.16 T). The triangle wave type has the lowest heat transfer rate; the square wave type maximizes [8]. Investigates the thermal-hydraulic properties of turbulent flow in conical tubes with dimples, finding high accuracy in a neural network model.…”

Section: Introductionmentioning

confidence: 99%

Impact of Different Protrusions in Energy Transfer and Fluid Flow Characteristics Using Al₂O₃ Nanofluid in Pipe Flow

Gulshan Kumar

2024

jes

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The study investigates how the protruded surface (the part sticking out of an otherwise flat surface) over the small channel affects flow characteristics and heat transfer within a circular flow regime, utilizing computational methods. This investigation uses an alumina nanofluid to compare and analyze the thermo-physical parameters of protruding pipes such as boxes, cylinders, dimples, and pyramids in pipe flow. Alumina nanofluid with varying volume fractions was evaluated as a thermo-fluid under laminar flow conditions, exploring its ability to enhance energy transmission (heat) over the protruded channels. The protruded surface induces turbulence around the protruded region, altering the coolant's physical characteristics. Since heat transfer predominantly occurs on surfaces, the alteration in surface geometry due to the protruded shape increases detectable heat transfer and the Nusselt number. With an increase in the volume percentage of nanofluids, there's a tendency for pressure loss to rise along the flow direction's centerline. The dimpled channel exhibits the highest Nusselt number among all protruding channels, indicating that increasing the Reynolds number also increases the surface heat transfer coefficient for all protrusions. When compared to the base fluid, cylindrical protrusions show the greatest pressure drop. Additionally, comparing a protruded channel with base fluid to one with a 4% volume of alumina nanofluid, it can be observed that the latter significantly improves heat transfer, followed by volume fractions of 1% to 3%.

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Section: Introductionmentioning

confidence: 99%