Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid

Experimental and numerical investigations are conducted to study the forced convection heat transfer and nanofluid flow through corrugated backward-facing step channels. Finite Volume Method (FVM) was used to solve the governing equation and the SIMPLE algorithm approach was applied. On 200 mm of...

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Main Author:	Hilo, Al Behadili Ali Kareem
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Heat - Transmission Ethylene glycol Nanofluids
Online Access:	http://psasir.upm.edu.my/id/eprint/92949/1/FK%202021%209%20UPMIR.pdf
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spelling	my-upm-ir.929492022-06-15T07:50:56Z Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid 2020-08 Hilo, Al Behadili Ali Kareem Experimental and numerical investigations are conducted to study the forced convection heat transfer and nanofluid flow through corrugated backward-facing step channels. Finite Volume Method (FVM) was used to solve the governing equation and the SIMPLE algorithm approach was applied. On 200 mm of the downstream wall, constant heat flux is applied, while the other walls are considered as isolated surfaces. Parameters such as corrugation shape (triangular, trapezoidal, and zigzag), amplitude height (1, 2, 3, 4, and 5 mm), pitch diameter (10, 20, 40, and 60 mm) and Reynolds number (Re) in the range of 5,000 to 20,000 were considered. The effect of CuO and MgO nanoparticles dispersed in pure ethylene glycol (EG) as a base fluid with diameters of 40 nm and volume concentrations of 0 to 5% on the fluid flow and heat transfer are investigated the length of the upstream wall of the channel was set to 200 mm and the length of the downstream wall was 300 mm. The height of the inlet and outlet were 10 mm and 20 ImTI, respectively. The expansion ratio is 2. The results reveal that combined a corrugated wall with a backward-facing step substantially improved the heat transfer, accompanied by a slight increment in the friction factor. The trapezoidal corrugated wall shows the highest enhancement in the heat transfer rate at 4 mm amplitude height and 20 mm pitch diameter. Combined the backward-facing step with corrugated wall enhanced the Nusselt number (Nu) up to 62% at Re = 5,000. The performance evaluation criteria increased as the amplitude height increases until it reached 4 mm and then decreased steeply. Moreover, the experimental results indicated that the heat transfer coefficient increases as the volume fraction of nanoparticles increased. The CuO-EG nanofluid enhances the Nusselt number up to II % compared to pure EG at a volume fraction of nanoparticles equal to 0.05. The friction factor of CuO nanofluid increases up to approximately 15% at volume fraction 0.01 and 0.03 and Reynolds number 5,000 and decreases as the Reynolds number increases. The maximum value of the performance evaluation criterion reached is 1.5 at a volume fraction of nanoparticles equal to 0.03 for the case of Cut) while it reaches 1.2 for the case ofMgO nanofluid. Heat - Transmission Ethylene glycol Nanofluids 2020-08 Thesis http://psasir.upm.edu.my/id/eprint/92949/ http://psasir.upm.edu.my/id/eprint/92949/1/FK%202021%209%20UPMIR.pdf text en public doctoral Universiti Putra Malaysia Heat - Transmission Ethylene glycol Nanofluids Abu Talib, Abd Rahim
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Abu Talib, Abd Rahim
topic	Heat - Transmission Ethylene glycol Nanofluids
spellingShingle	Heat - Transmission Ethylene glycol Nanofluids Hilo, Al Behadili Ali Kareem Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
description	Experimental and numerical investigations are conducted to study the forced convection heat transfer and nanofluid flow through corrugated backward-facing step channels. Finite Volume Method (FVM) was used to solve the governing equation and the SIMPLE algorithm approach was applied. On 200 mm of the downstream wall, constant heat flux is applied, while the other walls are considered as isolated surfaces. Parameters such as corrugation shape (triangular, trapezoidal, and zigzag), amplitude height (1, 2, 3, 4, and 5 mm), pitch diameter (10, 20, 40, and 60 mm) and Reynolds number (Re) in the range of 5,000 to 20,000 were considered. The effect of CuO and MgO nanoparticles dispersed in pure ethylene glycol (EG) as a base fluid with diameters of 40 nm and volume concentrations of 0 to 5% on the fluid flow and heat transfer are investigated the length of the upstream wall of the channel was set to 200 mm and the length of the downstream wall was 300 mm. The height of the inlet and outlet were 10 mm and 20 ImTI, respectively. The expansion ratio is 2. The results reveal that combined a corrugated wall with a backward-facing step substantially improved the heat transfer, accompanied by a slight increment in the friction factor. The trapezoidal corrugated wall shows the highest enhancement in the heat transfer rate at 4 mm amplitude height and 20 mm pitch diameter. Combined the backward-facing step with corrugated wall enhanced the Nusselt number (Nu) up to 62% at Re = 5,000. The performance evaluation criteria increased as the amplitude height increases until it reached 4 mm and then decreased steeply. Moreover, the experimental results indicated that the heat transfer coefficient increases as the volume fraction of nanoparticles increased. The CuO-EG nanofluid enhances the Nusselt number up to II % compared to pure EG at a volume fraction of nanoparticles equal to 0.05. The friction factor of CuO nanofluid increases up to approximately 15% at volume fraction 0.01 and 0.03 and Reynolds number 5,000 and decreases as the Reynolds number increases. The maximum value of the performance evaluation criterion reached is 1.5 at a volume fraction of nanoparticles equal to 0.03 for the case of Cut) while it reaches 1.2 for the case ofMgO nanofluid.
format	Thesis
qualification_level	Doctorate
author	Hilo, Al Behadili Ali Kareem
author_facet	Hilo, Al Behadili Ali Kareem
author_sort	Hilo, Al Behadili Ali Kareem
title	Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
title_short	Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
title_full	Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
title_fullStr	Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
title_full_unstemmed	Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
title_sort	nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid
granting_institution	Universiti Putra Malaysia
publishDate	2020
url	http://psasir.upm.edu.my/id/eprint/92949/1/FK%202021%209%20UPMIR.pdf
_version_	1747813780335624192

Nanofluid flow and heat transfer in corrugated backward-facing step channel using ethylene glycol as based fluid

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