Sub-micron dispersions of sand in water prepared by stirred bead milling and ultrasonication: A potential coolant

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• 作者：Manikandan Sivasubramanian ; Karthikeyan Nedunjezhian ; Silambarasan Murugesan ; Rajan Kalpoondi Sekar ; ^{ksrajan@chem.sastra.edu} ; ^{rajan_sekar@yahoo.com}
• 关键词：Sub-micron dispersion ; Stirred bead mill ; Viscosity ; Thermal conductivity ; Heat transfer coefficient
• 刊名：Applied Thermal Engineering
• 出版年：2012
• 期刊代码：8_13594311
• 类别：ce
• 出版时间：November, 2012
• 卷：44
• 期：Complete
• 页码：1-10
• 文件大小：526 K

摘要

Sub-micron dispersions of 鈥榮and in water鈥?have been prepared by stirred bead milling of the micron-sized sand particles, followed by probe ultrasonication. The dependence of dispersion viscosity and thermal conductivity on particle volume concentration has been studied. The influence of ultrasonication on the above transport properties has also been investigated. An estimated 4%and 10%increase in heat transfer coefficient may be obtained under turbulent and laminar flow conditions respectively by utilizing these dispersions as coolants. Further experimental studies in heat exchangers are required to ascertain the suitability of these dispersions for cooling applications.