Emrehan Gürsoy, Ezgi Çalar, A. Dağdeviren, Hayati Kadir Pazarlıoğlu, E. Gedik, K. Arslan
{"title":"Al2O3/水纳米流体在扭带延伸管内流动的热-水力性能分析","authors":"Emrehan Gürsoy, Ezgi Çalar, A. Dağdeviren, Hayati Kadir Pazarlıoğlu, E. Gedik, K. Arslan","doi":"10.51558/2831-0527.2022.1.1.34","DOIUrl":null,"url":null,"abstract":"In this numerical study, heat transfer characteristics and hydrodynamical\nanalysis have been performed for a circular tube inserted with twisted tape,\nwhich has different twisted pitch ratios (TPR=0, 50, 100, and 200). As a\nworking fluid Al2O3/water nanofluid is used which has different volumetric\nconcentrations (0.0≤φ≤3.0 vol. %). The numerical analysis has been carried out\nunder the constant wall heat flux (q′′) of 4357 W/m2 for laminar flow ranging\nthe Reynolds (Re) number from 1000 to 2000. According to numerical results,\nthe highest average Nusselt number (Nu) and average Darcy friction factor (ff)\nhave realized in twisted pitch ratio (TPR) 50. The reason is that when the\ntwisted pitch ratio gradually decreases, stronger secondary flows and a higher\nvelocity can be obtained. When compared with water, the highest Nu for\nTPR=50 has been obtained at φ=3.0 vol. % concentration as 61.15%. Also,\nwhen compared with TPR=0, the highest thermal performance enhancement\n(TPE) was realized at φ=3.0 vol. % concentration and Re=2000 conditions as\n61.15% for TPR=50.\n\nKeywords:\nCFD\nConvective heat transfer\nLaminar flow\nAl2O3/water\nTwisted tape","PeriodicalId":196631,"journal":{"name":"INTERNATIONAL JOURNAL OF THERMAL-FLUID ENGINEERING AND MODERN ENERGETICS","volume":"101 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Thermo-hydraulic Performance Analysis of Al2O3/water\\nNanofluid Flow in a Tube Extended by Twisted Tape\",\"authors\":\"Emrehan Gürsoy, Ezgi Çalar, A. Dağdeviren, Hayati Kadir Pazarlıoğlu, E. Gedik, K. Arslan\",\"doi\":\"10.51558/2831-0527.2022.1.1.34\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this numerical study, heat transfer characteristics and hydrodynamical\\nanalysis have been performed for a circular tube inserted with twisted tape,\\nwhich has different twisted pitch ratios (TPR=0, 50, 100, and 200). As a\\nworking fluid Al2O3/water nanofluid is used which has different volumetric\\nconcentrations (0.0≤φ≤3.0 vol. %). The numerical analysis has been carried out\\nunder the constant wall heat flux (q′′) of 4357 W/m2 for laminar flow ranging\\nthe Reynolds (Re) number from 1000 to 2000. According to numerical results,\\nthe highest average Nusselt number (Nu) and average Darcy friction factor (ff)\\nhave realized in twisted pitch ratio (TPR) 50. The reason is that when the\\ntwisted pitch ratio gradually decreases, stronger secondary flows and a higher\\nvelocity can be obtained. When compared with water, the highest Nu for\\nTPR=50 has been obtained at φ=3.0 vol. % concentration as 61.15%. Also,\\nwhen compared with TPR=0, the highest thermal performance enhancement\\n(TPE) was realized at φ=3.0 vol. % concentration and Re=2000 conditions as\\n61.15% for TPR=50.\\n\\nKeywords:\\nCFD\\nConvective heat transfer\\nLaminar flow\\nAl2O3/water\\nTwisted tape\",\"PeriodicalId\":196631,\"journal\":{\"name\":\"INTERNATIONAL JOURNAL OF THERMAL-FLUID ENGINEERING AND MODERN ENERGETICS\",\"volume\":\"101 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"INTERNATIONAL JOURNAL OF THERMAL-FLUID ENGINEERING AND MODERN ENERGETICS\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.51558/2831-0527.2022.1.1.34\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"INTERNATIONAL JOURNAL OF THERMAL-FLUID ENGINEERING AND MODERN ENERGETICS","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.51558/2831-0527.2022.1.1.34","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Thermo-hydraulic Performance Analysis of Al2O3/water
Nanofluid Flow in a Tube Extended by Twisted Tape
In this numerical study, heat transfer characteristics and hydrodynamical
analysis have been performed for a circular tube inserted with twisted tape,
which has different twisted pitch ratios (TPR=0, 50, 100, and 200). As a
working fluid Al2O3/water nanofluid is used which has different volumetric
concentrations (0.0≤φ≤3.0 vol. %). The numerical analysis has been carried out
under the constant wall heat flux (q′′) of 4357 W/m2 for laminar flow ranging
the Reynolds (Re) number from 1000 to 2000. According to numerical results,
the highest average Nusselt number (Nu) and average Darcy friction factor (ff)
have realized in twisted pitch ratio (TPR) 50. The reason is that when the
twisted pitch ratio gradually decreases, stronger secondary flows and a higher
velocity can be obtained. When compared with water, the highest Nu for
TPR=50 has been obtained at φ=3.0 vol. % concentration as 61.15%. Also,
when compared with TPR=0, the highest thermal performance enhancement
(TPE) was realized at φ=3.0 vol. % concentration and Re=2000 conditions as
61.15% for TPR=50.
Keywords:
CFD
Convective heat transfer
Laminar flow
Al2O3/water
Twisted tape
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