Experimental study on the thermal properties of Al ₂ O ₃ ‐CuO /water hybrid nanofluids: Development of an artificial intelligence model

Abstract

Summary In this work, Al2O3 and CuO nanoparticles were synthesized by a novel sol‐gel method. Then, water‐based Al2O3 and Al2O3‐CuO (50:50) nanofluids were produced by the two‐step method. The viscosity and thermal conductivity of nanofluids were determined for the concentration and temperature range of 0‐1.0 vol.% and 30‐60°C, respectively. Sodium dodecylbenzene sulfonate surfactant was used to enhance the nanofluid stability. Field emission scanning electron microscopy, transmission electron microscopy, and x‐ray diffraction techniques were used for the morphological characterization of the nanoparticles. The pH and zeta potential were used to determine the stability of the nanofluid. The outcomes show that the maximum augmentation in thermal conductivity and viscosity of hybrid nanofluid is 14.6 and 6.5% higher than Al2O3 nanofluid for 1.0 vol.% at 60 and 30°C, respectively. The maximum viscosity enhancement of Al2O3 and hybrid nanofluid is 14.9 and 21.4% is noticed at 30°C for a concentration of 1 vol. % relative to the base liquid. The novel equations were proposed to estimate the viscosity and thermal conductivity of hybrid nanofluid based on the experimental results with R2 values of 0.99 and 0.98, respectively. A cascaded forward neural network model was developed to predict the thermal properties using experimental datasets. The performance enhancement ratio of hybrid nanofluids indicated its potential for solar energy applications.

Numerical thermal study of ternary nanofluid influenced by thermal radiation towards convectively heated sinusoidal cylinder

“…Inspired by the enhanced heat transfer rate and cooling performance of nanoliquids, the researchers put their efforts on the study of multiple type of nanoliquids. Recently, Gangadhar et al [ [18] , [19] , [20] , [21] ], Marulasiddeshi et al [ 22 ], Wanatasanappan et al [ 23 ], Kotha et al [ 24 ], Bhargavi et al [ 25 ], Kanti et al [ [26] , [27] , [28] ] investigated the heat transfer efficacy of multiple nanoliquids using various geometries effects and the model parameters. The authors focused on both single as well as two phase nanoliquid models.…”

Exploring Surfactant-Enhanced Stability and Thermophysical Characteristics of Water-Ethylene Glycol-Based Al2O3-TiO2 Hybrid Nanofluids

“…Nanoparticles are made of metal and metal oxides [15], carbon nanotubes [16], and graphene-based nanofluids in the fields of heat transfer, [17]. Choosing the type of nanoparticle base fluids and their concentration is vital when preparing nanofluids with thermal properties that can be utilized in different heat transfer applications, [18]. The preparation methods significantly affect the thermal properties.…”

Design of single and two phase modeled nanofluid CPU cooler and their numerical analysis

“…In order to increase the thermal performance of nanofluids, many experimental studies have been carried out by researchers and their comparisons with numerical models have been made. In these studies, it was concluded that nanofluids enhancement thermal properties 15‐19 …”

“…In these studies, it was concluded that nanofluids enhancement thermal properties. [15][16][17][18][19] Hezajian et al 20 examined the effects of nanofluid use on heat transfer on a straight pipe by way of using H 2 O-Al 2 O 3 nanofluid in flow involving turbulent forced convection heat transfer. In this numerical analysis, he modelled the flow as multiphase and the methods he utilized are Mixture and Eulerian approaches.…”