Mass transfer in SiO_2 nanofluids: A case against purported nanoparticle convection effects

Xuemei Feng; Drew W. Johnson

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Mass transfer in SiO_2 nanofluids: A case against purported nanoparticle convection effects

机译：SiO_2纳米流体中的传质：反对纳米粒子对流效应的案例

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Controversy and the ambiguity exist in the scientific literature for the question of if nanoparticles truly enhance heat and mass transfer. This study experimentally explored effects of non-aggregating spherical SiO_2 nanoparticles on oxygen and NaCI mass transfer. No mass transfer enhancements were found in the presence of nanoparticles. Oxygen transfer was actually diminished at the highest nanoparticle volume fraction; this is attributed to solution viscosity effects and the obstruction effects of impermeable nanoparticles. No evidence was found to substantiate the purported Brownian motion microano-scale convection effect of nanoparticles that has been used by others to explain anomalous heat and mass transfer rates in nanofluids.

机译：科学文献中存在关于纳米粒子是否真正增强传热和传质的问题的争议和歧义。这项研究实验性地探索了非聚集球形SiO_2纳米粒子对氧气和NaCl传质的影响。在纳米颗粒的存在下没有发现传质增强。实际上，在最高的纳米颗粒体积分数下，氧气的传输减少了。这归因于溶液粘度效应和不可渗透纳米粒子的阻塞效应。尚未发现任何证据可证明纳米粒子所谓的布朗运动微观/纳米对流效应，该效应已被其他人用来解释纳米流体中的异常传热和传质速率。

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来源
《International Journal of Heat and Mass Transfer》 |2012年第14期|p.3447-3453|共7页
作者
Xuemei Feng; Drew W. Johnson;
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作者单位

Department of Civil & Environmental Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA;

Department of Civil & Environmental Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
nanofluids; mass transfer; brownian motion;

机译：纳米流体传质布朗运动;

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机译：在对流边界条件下，在存在热扩散的情况下，纳米流体中MHD混合对流中具有传热传质的纳米颗粒体积分数

Mass transfer in SiO_2 nanofluids: A case against purported nanoparticle convection effects

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