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中文摘要：
本文通过实验方法测量了H20＋Si02纳米流体在剪切流场（剪切速率范围在89-820s-1）中的等效热导率，并与已有的关联式进行了比较。测量结果表明纳米流体的热导率随着剪切速率的增加而增加，并且当剪切速率达到一个临界值时热导率会出现最大值。颗粒体积分数和颗粒直径越大，纳米流体热导率随着剪切速率的增加越明显。通过与关联式的比较发现，已有关联式几乎不能预测纳米流体等效热导率的增加，同时关联式中热导率会随着剪切速率的增加而一直增加，这与实验结果不符。
英文摘要：
In this paper, the effective thermal conductivity （ETC） of H20＋SiO2 nanofluids in shear fields is measured and compared with the conventional correlation. The flow shear rate varies within the range of 89N820 s-1. For the tested nanofluids, the ETC increases with the shear rate increasing and reaches a plateau value above a critical shear rate. The increase of the ETC with shear rate is more obvious as increases the nanoparticle diameter and volume fraction. The ETC of nanofluids fails to be predicted by the conventional correlation, in which the ETC monotonously increases with increasing the shear rate.
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