Role of Brownian Motion Hydrodynamics on Nanofluid Thermal Conductivity.

Evans, W. ; Fish, J. ; Keblinski, P.

Technical Information Center Oak Ridge Tennessee

关键词: Heat flux;    Fluids;    Nanostructures;    Brownian movement;    Thermal conductivity;   

RP-ID  :  DE2006875900

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We use a simple kinetic theory based analysis of heat flow in fluid suspensions of solid nanoparticles (nanofluids) to demonstrate that the hydrodynamics effects associated with Brownian motion have a minor effect on the thermal conductivity of the nanofluid. Our conjecture is supported by the results of molecular dynamics simulations of heat flow in a model nanofluid with well-dispersed particles. Our findings are consistent with the predictions of the effective medium theory as well as with recent experimental results on well dispersed metal nanoparticle suspensions.