Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube
碩士 === 中原大學 === 機械工程研究所 === 104 === This study conducts a research of permanent-magnetically-driven flow of magnetic nanofluids in a microtube. The main purpose is to investigate the influence of volume fraction of particles, magnetic field gradient, and magnetic disk rotational speed on the magneti...
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ndltd-TW-104CYCU54890342017-08-27T04:30:05Z http://ndltd.ncl.edu.tw/handle/40501814241661060159 Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube 磁性奈米流體於微管道內永磁驅動流之研究 Wen-Yu Zhang 張文昱 碩士 中原大學 機械工程研究所 104 This study conducts a research of permanent-magnetically-driven flow of magnetic nanofluids in a microtube. The main purpose is to investigate the influence of volume fraction of particles, magnetic field gradient, and magnetic disk rotational speed on the magnetic driving force in the microtube. First, water-based magnetite (Fe3O4) nanofluids are prepared, and experimental measurements of their material properties are made. Further, the theoretical formula of magnetic driving force is provided, and some experiments are done to verify the validation of the formula. Finally, the analysis of the characteristics of the permanent-magnetically-driven flow of magnetic nanofluids in a microtube is conducted through experimental data of the volume flow rate and calculations of the magnetic driving formula. Experimental results are found that the magnetic driving force increases with the increase in the particle volume fraction, magnetic field gradients, and magnetic-disk rotational speed. At higher values of these parameters, the increasing becomes slowly. Moreover, the magnetic driving force increases dramatically with the decrease in the distance between the magnetic disk and the microtube. All magnetic effects could be magnified in a larger microtube. Huei-Chu Weng 翁輝竹 2016 學位論文 ; thesis 61 zh-TW |
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碩士 === 中原大學 === 機械工程研究所 === 104 === This study conducts a research of permanent-magnetically-driven flow of
magnetic nanofluids in a microtube. The main purpose is to investigate the influence
of volume fraction of particles, magnetic field gradient, and magnetic disk rotational
speed on the magnetic driving force in the microtube. First, water-based magnetite
(Fe3O4) nanofluids are prepared, and experimental measurements of their material
properties are made. Further, the theoretical formula of magnetic driving force is
provided, and some experiments are done to verify the validation of the formula.
Finally, the analysis of the characteristics of the permanent-magnetically-driven flow
of magnetic nanofluids in a microtube is conducted through experimental data of the
volume flow rate and calculations of the magnetic driving formula.
Experimental results are found that the magnetic driving force increases with the
increase in the particle volume fraction, magnetic field gradients, and magnetic-disk
rotational speed. At higher values of these parameters, the increasing becomes slowly.
Moreover, the magnetic driving force increases dramatically with the decrease in the
distance between the magnetic disk and the microtube. All magnetic effects could be
magnified in a larger microtube.
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author2 |
Huei-Chu Weng |
author_facet |
Huei-Chu Weng Wen-Yu Zhang 張文昱 |
author |
Wen-Yu Zhang 張文昱 |
spellingShingle |
Wen-Yu Zhang 張文昱 Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
author_sort |
Wen-Yu Zhang |
title |
Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
title_short |
Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
title_full |
Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
title_fullStr |
Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
title_full_unstemmed |
Study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
title_sort |
study on the permanent-magnetically-driven flow of magnetic nanofluids in a microtube |
publishDate |
2016 |
url |
http://ndltd.ncl.edu.tw/handle/40501814241661060159 |
work_keys_str_mv |
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