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.
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•Evaluating the thermophysical properties and heat transfer performance•Proposing two new correlations for estimating the thermophysical properties•Performing the thermal and fluid dynamic performance of the nanofluid•The two-step method has been employed to prepare the samples.•The stability of the samples has been studied by conducting Zeta potential test.