Role of Brownian motion in the enhanced thermal conductivity of nanofluids

Applied Physics Letters - Tập 84 Số 21 - Trang 4316-4318 - 2004
Seok Pil Jang1, Stephen U. S. Choi1
1Energy Technology Division, Argonne National Laboratory, Argonne, Ilinois 60439

Tóm tắt

We have found that the Brownian motion of nanoparticles at the molecular and nanoscale level is a key mechanism governing the thermal behavior of nanoparticle–fluid suspensions (“nanofluids”). We have devised a theoretical model that accounts for the fundamental role of dynamic nanoparticles in nanofluids. The model not only captures the concentration and temperature-dependent conductivity, but also predicts strongly size-dependent conductivity. Furthermore, we have discovered a fundamental difference between solid/solid composites and solid/liquid suspensions in size-dependent conductivity. This understanding could lead to design of nanoengineered next-generation coolants with industrial and biomedical applications in high-heat-flux cooling.

Từ khóa


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Thông tin
Thông tin xuất bản

Applied Physics Letters

Tập 84 Số 21

4316-4318

Thông tin tác giả