An Improved Model for Prediction of the Effective Thermal Conductivity of Nanofluids

Thermal conductivity is an important characteristic of a nanofluid in laminar flow heat transfer. This paper presents an improved model for the prediction of the effective thermal conductivity of nanofluids based on dimensionless groups. The model expresses the thermal conductivity of a nanofluid as a function of the thermal conductivity of the solid and liquid, their volume fractions and particle size. The proposed model includes a parameter which accounts for the interfacial shell, brownian motion, and aggregation of particle. The validation of the model is verified by applying the results obtained by the experiments of Tio2-water and Al2o3-water nanofluids.

Authors:

• K. Abbaspoursani
• M. Allahyari
• M. Rahmani

Keywords:

• Critical particle size
• nanofluid
• model
• and thermal conductivity.

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