S. Jang, K. Hwang, Ji-Hwan Lee, Jun Ho Kim, B. Lee, S.U.S. Choi
{"title":"含低浓度Al2O3的水基纳米流体的有效导热系数和粘度","authors":"S. Jang, K. Hwang, Ji-Hwan Lee, Jun Ho Kim, B. Lee, S.U.S. Choi","doi":"10.1109/NANO.2007.4601354","DOIUrl":null,"url":null,"abstract":"We experimentally investigated effective thermal conductivities and viscosities of water-based nanofluids containing Al<sub>2</sub>O<sub>3</sub> (Al<sub>2</sub>O<sub>3</sub>-nanofluids) with low concentration from vol. 0.01% to 0.3%. Without surfactant, Al<sub>2</sub>O<sub>3</sub>-nanofluids are manufactured by two-step method which is widely used. To examine suspension and dispersion characteristics of Al<sub>2</sub>O<sub>3</sub>-nanofluids, zeta potential as well as transmission electron micrograph of Al<sub>2</sub>O<sub>3</sub> nanoparticles is observed. The effective viscosities of Al<sub>2</sub>O<sub>3</sub>-nanofluids according to the temperature are measured by a viscometer of oscillating type. The transient hot wire method is used in this study to measure the effective thermal conductivities of Al<sub>2</sub>O<sub>3</sub>-nanofluids. Based on the results the maximum increase of effective viscosities of Al<sub>2</sub>O<sub>3</sub>-nanofluids is up to 2.9% while the maximum enhancement of effective thermal conductivities is up to 1.44%.","PeriodicalId":6415,"journal":{"name":"2007 7th IEEE Conference on Nanotechnology (IEEE NANO)","volume":"32 1","pages":"1011-1014"},"PeriodicalIF":0.0000,"publicationDate":"2007-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"17","resultStr":"{\"title\":\"Effective thermal conductivities and viscosities of water-based nanofluids containing Al2O3 with low concentration\",\"authors\":\"S. Jang, K. Hwang, Ji-Hwan Lee, Jun Ho Kim, B. Lee, S.U.S. Choi\",\"doi\":\"10.1109/NANO.2007.4601354\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We experimentally investigated effective thermal conductivities and viscosities of water-based nanofluids containing Al<sub>2</sub>O<sub>3</sub> (Al<sub>2</sub>O<sub>3</sub>-nanofluids) with low concentration from vol. 0.01% to 0.3%. Without surfactant, Al<sub>2</sub>O<sub>3</sub>-nanofluids are manufactured by two-step method which is widely used. To examine suspension and dispersion characteristics of Al<sub>2</sub>O<sub>3</sub>-nanofluids, zeta potential as well as transmission electron micrograph of Al<sub>2</sub>O<sub>3</sub> nanoparticles is observed. The effective viscosities of Al<sub>2</sub>O<sub>3</sub>-nanofluids according to the temperature are measured by a viscometer of oscillating type. The transient hot wire method is used in this study to measure the effective thermal conductivities of Al<sub>2</sub>O<sub>3</sub>-nanofluids. Based on the results the maximum increase of effective viscosities of Al<sub>2</sub>O<sub>3</sub>-nanofluids is up to 2.9% while the maximum enhancement of effective thermal conductivities is up to 1.44%.\",\"PeriodicalId\":6415,\"journal\":{\"name\":\"2007 7th IEEE Conference on Nanotechnology (IEEE NANO)\",\"volume\":\"32 1\",\"pages\":\"1011-1014\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"17\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2007 7th IEEE Conference on Nanotechnology (IEEE NANO)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/NANO.2007.4601354\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 7th IEEE Conference on Nanotechnology (IEEE NANO)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NANO.2007.4601354","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effective thermal conductivities and viscosities of water-based nanofluids containing Al2O3 with low concentration
We experimentally investigated effective thermal conductivities and viscosities of water-based nanofluids containing Al2O3 (Al2O3-nanofluids) with low concentration from vol. 0.01% to 0.3%. Without surfactant, Al2O3-nanofluids are manufactured by two-step method which is widely used. To examine suspension and dispersion characteristics of Al2O3-nanofluids, zeta potential as well as transmission electron micrograph of Al2O3 nanoparticles is observed. The effective viscosities of Al2O3-nanofluids according to the temperature are measured by a viscometer of oscillating type. The transient hot wire method is used in this study to measure the effective thermal conductivities of Al2O3-nanofluids. Based on the results the maximum increase of effective viscosities of Al2O3-nanofluids is up to 2.9% while the maximum enhancement of effective thermal conductivities is up to 1.44%.
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