Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel

Various interior techniques to enhance the local heat transfer are essential for improved performance of appliances. The high-pressure penalties created by these applied passive techniques cause high power consumption and lower the pumping power. This research presents the simulation of four (4) dif...

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Autores principales:	S.A. Aasa, A.S. Shote, S.O. Giwa, M. Sharifpur
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Dimple surface Friction factor Heat transfer enhancement Nusselt number Passive technique and rectangular channel Fuel TP315-360
Acceso en línea:	https://doaj.org/article/ef3cadfd660a436eba8b9d2e7863df6f
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spelling	oai:doaj.org-article:ef3cadfd660a436eba8b9d2e7863df6f2021-12-04T04:35:57ZConvective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel2666-052010.1016/j.jfueco.2021.100044https://doaj.org/article/ef3cadfd660a436eba8b9d2e7863df6f2022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666052021000376https://doaj.org/toc/2666-0520Various interior techniques to enhance the local heat transfer are essential for improved performance of appliances. The high-pressure penalties created by these applied passive techniques cause high power consumption and lower the pumping power. This research presents the simulation of four (4) different compound angled dimples, which are presented in this research; Case 1: 90-Circular-45-Oval dimple (90-C-45-O); Case 2: 45-Oval-90-Circular dimple (45-O-90C); Case 3: 60-Oval-90-Circular dimple (60-O-90-C); Case 4: 90-Circular-60-Oval dimple (90-C-60-O). The oval dimple print diameter, D = 20 mm, and the circular dimple print diameter, d = 10 mm. The objectives are to investigate the influence of mixed geometries with varying locations and orientation angles of the dimples. The pressure drops and heat transfer measurements are extracted using the Star-CCM+ CFD simulation bench RANS model. It was revealed that friction factor ratio, (f/fo) increases with the Reynolds number, and at the minimum of Re 1000, a 25% increment is observed, while 71% increment is noted for 11,000 Re. Case 2 has optimal effects compared to cases 3, 2 and 1. The Nusselt number ratio (Nu/Nuo) increases with Re with at least a 26% increment at 1000 Re for Case 1. Case 4 dimple arrangement is observed to be least performing arrangement with 12 – 22% Nusselt number increment. Also, the thermal performance quantified by (Nu/Nuo) / (f/fo)1/3 is the highest for the angle of Case 2 for all Re > 2000. The results thus contribute to engineering applications with thermal performance based on varying angle, and heat transfer enhancement.S.A. AasaA.S. ShoteS.O. GiwaM. SharifpurElsevierarticleDimple surfaceFriction factorHeat transfer enhancementNusselt numberPassive technique and rectangular channelFuelTP315-360ENFuel Communications, Vol 10, Iss , Pp 100044- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dimple surface Friction factor Heat transfer enhancement Nusselt number Passive technique and rectangular channel Fuel TP315-360
spellingShingle	Dimple surface Friction factor Heat transfer enhancement Nusselt number Passive technique and rectangular channel Fuel TP315-360 S.A. Aasa A.S. Shote S.O. Giwa M. Sharifpur Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
description	Various interior techniques to enhance the local heat transfer are essential for improved performance of appliances. The high-pressure penalties created by these applied passive techniques cause high power consumption and lower the pumping power. This research presents the simulation of four (4) different compound angled dimples, which are presented in this research; Case 1: 90-Circular-45-Oval dimple (90-C-45-O); Case 2: 45-Oval-90-Circular dimple (45-O-90C); Case 3: 60-Oval-90-Circular dimple (60-O-90-C); Case 4: 90-Circular-60-Oval dimple (90-C-60-O). The oval dimple print diameter, D = 20 mm, and the circular dimple print diameter, d = 10 mm. The objectives are to investigate the influence of mixed geometries with varying locations and orientation angles of the dimples. The pressure drops and heat transfer measurements are extracted using the Star-CCM+ CFD simulation bench RANS model. It was revealed that friction factor ratio, (f/fo) increases with the Reynolds number, and at the minimum of Re 1000, a 25% increment is observed, while 71% increment is noted for 11,000 Re. Case 2 has optimal effects compared to cases 3, 2 and 1. The Nusselt number ratio (Nu/Nuo) increases with Re with at least a 26% increment at 1000 Re for Case 1. Case 4 dimple arrangement is observed to be least performing arrangement with 12 – 22% Nusselt number increment. Also, the thermal performance quantified by (Nu/Nuo) / (f/fo)1/3 is the highest for the angle of Case 2 for all Re > 2000. The results thus contribute to engineering applications with thermal performance based on varying angle, and heat transfer enhancement.
format	article
author	S.A. Aasa A.S. Shote S.O. Giwa M. Sharifpur
author_facet	S.A. Aasa A.S. Shote S.O. Giwa M. Sharifpur
author_sort	S.A. Aasa
title	Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
title_short	Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
title_full	Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
title_fullStr	Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
title_full_unstemmed	Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
title_sort	convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/ef3cadfd660a436eba8b9d2e7863df6f
work_keys_str_mv	AT saaasa convectivethermohydraulicheattransferenhancementofmixeddimpledgeometriesinrectangularchannel AT asshote convectivethermohydraulicheattransferenhancementofmixeddimpledgeometriesinrectangularchannel AT sogiwa convectivethermohydraulicheattransferenhancementofmixeddimpledgeometriesinrectangularchannel AT msharifpur convectivethermohydraulicheattransferenhancementofmixeddimpledgeometriesinrectangularchannel
_version_	1718372946746015744

Convective thermohydraulic heat transfer enhancement of mixed dimpled geometries in rectangular channel

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