Heat transfer mechanisms and clustering in nanofluids

Kaufui Wong, Michael J. Castillo

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

This paper surveys heat transfer in nanofluids. It summarizes and analyzes the theories regarding heat transfer mechanisms in nanofluids, and it discusses the effects of clustering on thermal conductivity. The heat transfer associated with conduction is presented through various experiments followed by a discussion of the theories developed. Relationships between thermal conductivity and various factors such as temperature, concentration, and particle size are also displayed along with a discussion on clustering. There is a brief discussion on convection where the number of studies is limited. There is research currently being performed on the manipulation of the properties governing the thermal conductivity of nanofluids-the particle size, shape, and surface area. Other factors that affect heat transfer are the material of the nanoparticle, particle volume concentration, and the fluid used. Although the interest in this relatively new class of fluids has generated many experimental studies, there is still disagreement over several aspects of heat transfer in nanofluids, primarily concerning the mechanisms behind the increased thermal conductivity. Although nanoparticles have greatly decreased the risks, there is still evidence of unwanted agglomeration which causes erosion and affect the overall conductivity. Research is currently being conducted to determine how to minimize this unwanted clustering.

Original languageEnglish
Article number795478
JournalAdvances in Mechanical Engineering
Volume2010
DOIs
StatePublished - Nov 22 2010

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Heat transfer
Thermal conductivity
Particle size
Nanoparticles
Fluids
Erosion
Agglomeration
Experiments
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Heat transfer mechanisms and clustering in nanofluids. / Wong, Kaufui; Castillo, Michael J.

In: Advances in Mechanical Engineering, Vol. 2010, 795478, 22.11.2010.

Research output: Contribution to journalArticle

Wong, Kaufui ; Castillo, Michael J. / Heat transfer mechanisms and clustering in nanofluids. In: Advances in Mechanical Engineering. 2010 ; Vol. 2010.
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