Background: The artificial neural network has been employed to predict the thermal conductivity
of the carbon nanotube–ethylene glycol (CNT-EG) nanofluid based on experimental data.
The main aim of this study is to find the best training algorithm for modeling the thermal conductivity
Methods: Different activating functions and two training algorithms have been tested to train the
neurons. The architecture of this modeling is the same and consists of one hidden layer with two
neurons. The input parameters of the network include 20 data of temperatures (15–55oC) and volume
concentrations (2.2–7.8 vol.%), and the output of the network is the thermal conductivity coefficient.
Results: The results indicate that the trainbr algorithm with the Elliotsig activating function responses
have a higher regression coefficient and a lower mean square error. The results show also
that an artificial neural network can estimate the experimental results with high precision in a wide
range of temperatures and concentrations of carbon nanotubes.
Conclusion: The comparative graph with experimental data and artificial neural network modeling
results in terms of temperature for different volume fractions revealed that the neural network can
estimate the experimental results with high precision at a wide range of temperatures and concentrations
of CNTs. Also, the results indicated that the neural network was not a proper tool for outside of
the available data and should be used in the same range in which it was trained.