Heat Transfer Intensification Using Nanofluids

KONA Powder and Particle Journal

卷:25

Wei Yang¹  Ran Huo¹  Haisheng Chen¹  Chane-Yuan Yang¹  Wai Peng Lee²  Liang Wang³  Lingling Zhang³  Yurong He³  Yulong Ding³ 

[1] Engineering,University of Leeds;

[2] ;

[3] Institute of Particle Science &

关键词: nanofluids;    thermal conduction;    natural convective heat transfer;    forced convective heat transfer;    boiling heat transfer;    mechanisms;   

DOI  :  10.14356/kona.2007006

来源: DOAJ

【 摘 要 】

This paper summarises some of our recent work on the heat transfer of nanofluids(dilute liquid suspensions of nanoparticles). It covers heat conduction,convective heat transfer under both natural and forced flow conditions, andboiling heat transfer in the nucleate regime. The results show that, despiteconsiderable data scattering, the presence of nanoparticles enhances thermalconduction under macroscopically static conditions mainly due to nanoparticlestructuring/networking. The natural convective heat transfer coefficient isobserved to decrease systematically with increasing nanoparticle concentration,and the deterioration is partially attributed to the high viscosity ofnanofluids. However, either enhancement or deterioration of convective heattransfer is observed under the forced flow conditions and particle migration issuggested to be an important mechanism. The results also show that the boilingheat transfer is enhanced in the nucleate regime for both alumina and titaniananofluids, and the enhancement is more sensitive to the concentration changefor TiO2 nanofluids. It is concluded that there is still some way togo before we can tailor-make nanofluids for any targeted applications.

【 授权许可】

Unknown