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首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer properties of nanoparticle-in-fluid dispersions (nanofluids) in laminar flow
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Heat transfer properties of nanoparticle-in-fluid dispersions (nanofluids) in laminar flow

机译：层流中纳米颗粒-流体分散体（纳米流体）的传热特性

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摘要

The convective heat transfer coefficients of several nanoparticle-in-liquid dispersions (nanofluids) have been measured under laminar flow in a horizontal tube heat exchanger. The nanoparticles used in this research were graphitic in nature, with aspect ratios significantly different from one (l/d ≈ 0.02). The graphite nanoparticles increased the static thermal conductivities of the fluid significantly at low weight fraction loadings. However, the experimental heat transfer coefficients showed lower increases than predicted by either the conventional heat transfer correlations for homogeneous fluids, or the correlations developed from the particle suspensions with aspect ratios close to one. New correlations on heat transfer need to be developed for nanofluid systems.
机译：在水平管式换热器中，在层流作用下，已测量了几种纳米液体分散体（纳米流体）的对流传热系数。这项研究中使用的纳米粒子本质上是石墨的，其长宽比明显不同于一个（l / d≈0.02）。石墨纳米颗粒在低重量分数负载下显着提高了流体的静态导热率。但是，实验的传热系数显示出的增长低于均质流体的传统传热相关性或纵横比接近于1的粒子悬浮液所形成的相关性。需要为纳米流体系统开发新的传热相关性。

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