Investigation of Heat Transfer Enhancement by using Al2O3/water Nanofluid in Rectangular Corrugated Channel

Tokgöz, Nehir; Özbolat, Veli; Şahi̇n, Beşi̇r

doi:10.17780/ksujes.11458

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…İncelenen nanoakışın Reynolds sayısı ise aşağıda verilen Eşitlik 8 [7] aracılığı ile belirlenmektedir.…”

Section: A K a L E B İ L G İ S İ ö Z E Tunclassified

“…Hidrolik çapın değeri boru çapı (D) olarak alınmıştır. Akışın ortalama ısı taşınım katsayısı (h) ise Eşitlik 9 [7] yardımıyla belirlenmektedir. Burada, "Tw" duvar sıcaklığı ve "Tm" ise bulk sıcaklığıdır.…”

Section: A K a L E B İ L G İ S İ ö Z E Tunclassified

“…katsayısı Eşitlik 10'da yerine yazılarak ortalama Nusselt sayısı[7] belirlenmektedir.Bu çalışmada incelenen modellerin süreklilik, momentum ve enerji denklemleri hesaplamalı akışkanlar dinamiği (HAD) aracılığı ile sayısal olarak çözülmüştür. Bu amaçla Fluent paket programı kullanılmıştır.…”

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Investigation of the Effects of Nanofluid Usage and Variation of Helical Fin Number on Heat Transfer in a Pipe With Helical Fins

DOĞAN>

Demircan

2022

Mühendislik Bilimleri Ve Araştırmaları Dergisi

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In this study, the effects of nanofluid usage on heat transfer in a pipe with helical fins on its inner surface were investigated. In this context, four model geometries were determined as finless, single helical fin, double helical fin and triple helical fin tube. It is assumed that hBN-water (hexagonal boron nitride-water) nanofluid with constant inlet temperature passes through the pipe, and a constant heat flux is applied to the pipe surfaces. Water was used as the base fluid. 0%, 0.5%, 1%, 1.5%, 2% and 2.5% hBN nanoparticles were added to the water. Numerical analyses were carried out with the help of Computational Fluid Dynamics. As a result of the study, it was observed that the average fluid temperature, heat transfer coefficient and Nusselt number increased with increasing the number of fins and the mixing ratio of the nanofluid. The lowest Nusselt number was determined as 25.93 in the case of water flowing from the finless pipe, and the highest Nusselt number was determined as 97,036 in the case of three helical fins and 2.5% volumetric mixture. Therefore, it was observed that adding helical fins to a pipe and using hBN-water nanofluid had a positive effect on heat transfer.

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“…İncelenen nanoakışın Reynolds sayısı ise aşağıda verilen Eşitlik 8 [7] aracılığı ile belirlenmektedir.…”

Section: A K a L E B İ L G İ S İ ö Z E Tunclassified

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Investigation of the Effects of Nanofluid Usage and Variation of Helical Fin Number on Heat Transfer in a Pipe With Helical Fins

DOĞAN>

Demircan

2022

Mühendislik Bilimleri Ve Araştırmaları Dergisi

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Flow Characteristics and Heat Transfer Enhancement of Sinusoidal Corrugated Channels with Different Configurations

ÖZBOLAT

Şahi̇n

2022

Çukurova Üniversitesi Mühendislik Fakültesi Dergisi

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This study investigated flow characteristics and heat transfer enhancement in various sinusoidal corrugated channels. The channel height and the phase shift effects on the flow structures and thermal performances were examined numerically for Reynolds numbers in the range of 2500≤Re≤7500. The geometrical configurations of this study cover three different channel heights (Hmin/Hmax=0.36, 0.54, 0.72) and three phase shift angles (φ=0°, 90°, 180°). Velocity distribution, turbulence intensity, local and averaged Nusselt numbers, and friction factor were calculated for various configurations. Finally, thermal performance factors (TPF) were also calculated to determine the optimum channel configuration and operating condition.

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Investigation of Heat Transfer Enhancement by using Al2O3/water Nanofluid in Rectangular Corrugated Channel

Cited by 2 publications

References 21 publications

Investigation of the Effects of Nanofluid Usage and Variation of Helical Fin Number on Heat Transfer in a Pipe With Helical Fins

Investigation of the Effects of Nanofluid Usage and Variation of Helical Fin Number on Heat Transfer in a Pipe With Helical Fins

Flow Characteristics and Heat Transfer Enhancement of Sinusoidal Corrugated Channels with Different Configurations

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