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Review of interfacial layer’s effect on thermal conductivity in nanofluid

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Abstract

An ordered liquid layer around the particle–liquid interface is called as interfacial layer. It has been observed that interfacial layer is an essential parameter for determining the effective thermal conductivity of nanofluids. The review attempts to summarize the prominent articles related to interfacial layer effect on the thermal conductivity of nanofluids. First section of the paper discusses about various experimental approaches used to describe the effect of interfacial layer. Second section deals with about the mathematical models and assumed values regarding the thickness of interfacial layer by several authors. A review of previous works featuring mathematical investigations and experimental approaches seem to be suggesting that, interfacial layer have dominating effect on the effective thermal conductivity of the nanofluids. Third section of the paper deals with various mathematical models available in open literature for interfacial layer thermal conductivity. In the last section, models for effective thermal conductivity of the nanofluids considering the interfacial layer and percentage deviations in the predictions of mathematical models have been discussed.

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Abbreviations

r p :

Particle radius

ρ :

Density

∇:

Divergence

t :

Thickness of interfacial layer

α :

Coefficient in thermal conductivity

ϕ :

Volume fraction

N A :

Avogadro constant

M f :

Molecular weight of liquid

k :

Thermal conductivity

agg :

Aggregating particles

c :

Combined nanoparticles

cl :

Particle cluster

e :

Equivalent particle

eff :

Effective

f :

Base fluid

l :

Interfacial layer

m :

Power law exponent

non-agg :

Non-aggregating particles

p :

Particle

r :

Variable radius

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Authors and Affiliations

  1. Department of Mechanical Engineering, Indian School of Mines, Dhanbad, India

    Ankit Kotia, Sheeba Borkakoti, Piyush Deval & Subrata Kumar Ghosh

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  1. Ankit Kotia
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  2. Sheeba Borkakoti
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  3. Piyush Deval
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  4. Subrata Kumar Ghosh
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Correspondence to Subrata Kumar Ghosh.

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Kotia, A., Borkakoti, S., Deval, P. et al. Review of interfacial layer’s effect on thermal conductivity in nanofluid. Heat Mass Transfer 53, 2199–2209 (2017). https://doi.org/10.1007/s00231-016-1963-6

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  • DOI: https://doi.org/10.1007/s00231-016-1963-6

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