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Effect of aggregation and interfacial thermal resistance on thermal conductivity of nanocomposites and colloidal nanofluids

2008; Elsevier BV; Volume: 51; Issue: 5-6 Linguagem: Inglês

10.1016/j.ijheatmasstransfer.2007.10.017

1879-2189

William J. Evans, Ravi Prasher, Jacob Fish, Paul Meakin, Patrick E. Phelan, Pawel Keblinski,

Phase Change Materials Research

We analyzed the role of aggregation and interfacial thermal resistance on the effective thermal conductivity of nanofluids and nanocomposites. We found that the thermal conductivity of nanofluids and nanocomposites can be significantly enhanced by the aggregation of nanoparticles into clusters. The value of the thermal conductivity enhancement is determined by the cluster morphology, filler conductivity and interfacial thermal resistance. We also compared thermal conductivity enhancement due to aggregation with that associated with high-aspect ratio fillers, including fibers and plates.