On the heat transfer effectiveness and pumping power assessment of a diamond-water nanofluid based on thermophysical properties: An experimental study

Abstract

Thermophysical properties, heat transfer effectiveness, and pumping power assessment of a biologically friendly Diamond-water nanofluid are the most important objectives of the present paper. The samples are prepared by employing the two-step method in six different solid concentrations, and their stability is investigated through zeta potential analysis 14 days after the preparations. Then, the dynamic viscosity and thermal conductivity of the samples are measured in 8 different temperatures. A 25% increase in thermal conductivity has been observed. Applying a curve-fitting method, two new correlations for predicting the dynamic viscosity and thermal conductivity of the nanofluid are proposed. Finally, the effects of diamond nanoparticle on the thermal effectiveness and pumping power of the nanofluid are studied. It is found that the nanofluid would be a suitable heat transfer fluid in a fully developed internal laminar flow regime in all the studied temperatures and solid concentrations.