期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 51, 期 21-22, 页码 5130-5143出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2008.04.058
关键词
Nanofluid heat transfer; Thermophoresis; Ultrasound; Resuspension; Hot-wire conductimetry; Diffusion limit
We illustrate the diffusion limit of wall heat transfer in fluid-solid suspensions by considering small colloidal particles dilute in a liquid at rest. Because such particles are agitated by Brownian motion, their self-diffusivity is modest, the fluid and solid phases share the same temperature, and mixture theory should predict the effective suspension conductivity. We show how thermophoresis creates suspension inhomogeneities, suggest ways to mitigate the latter with ultrasonic forcing, and examine consequences on heat transfer. To inform a debate on nanofluids heat transfer, we show that anomalous conductivity enhancements reported with hot-wire thermal conductimetry can be an experimental artifact of thermophoretic migration along the temperature gradient or timing in the observations. (C) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据