Using micro-ct to investigate nanofluid droplet sorption in dry powder beds

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• 作者：Timothy Munuhe^a ; Alexander Lebrun^b ; Liang Zhu^a ; Ronghui Ma^a ; ^{roma@umbc.edu}
• 关键词：Droplet spreading ; Droplet sorption ; Powder bed wetting ; Micro-CT imaging
• 刊名：Powder Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：305
• 期：Complete
• 页码：232-240
• 全文大小：1674 K
• 卷排序：305

文摘

Ferrofluid drops impact and absorb into dry PMMA powder beds at low speed. Resulting granules are visualized via micro-CT and their geometry is recorded. Ferrofluid improves visualization by augmenting the density of the saturated region. Results suggest capillary and buoyancy forces re-pack the powder bed during sorption. Re-packing pushes the ferrofluid to the wetting front below the powder bed surface.