Abstract
Researchers have been perplexed for the past five years with the unusually high thermal conductivity of nanoparticle-laden colloidal solutions (nanofluids). Although various mechanisms and models have been proposed in the literature to explain the high of these nanofluids, no concrete conclusions have been reached. Through an order-of-magnitude analysis of various possible mechanisms, we show that convection caused by the Brownian movement of these nanoparticles is primarily responsible for the enhancement in of these colloidal nanofluids.
- Received 20 September 2004
DOI:https://doi.org/10.1103/PhysRevLett.94.025901
©2005 American Physical Society