Water pool boiling in metal foams: From experimental results to a generalized model based on artificial neural network

Calati, Michele; Righetti, Giulia; Doretti, Luca; Zilio, Claudio; Longo, Giovanni Antonio; Hooman, Kamel; Mancin, Simone

doi:10.1016/j.ijheatmasstransfer.2021.121451

Cited by 22 publications

(1 citation statement)

References 33 publications

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“…However, the authors note that neural networks have been used in the modelling of closed-cell polymer cellulars [ 53 ]. Neural networks are more often used for the analysis of specific features of metal foams and sponges, mainly heat exchange, e.g., [ 54 , 55 ].…”

Section: Introductionmentioning

confidence: 99%

Specifications for Modelling of the Phenomenon of Compression of Closed-Cell Aluminium Foams with Neural Networks

2022

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The article presents a novel application of the most up-to-date computational approach, i.e., artificial intelligence, to the problem of the compression of closed-cell aluminium. The objective of the research was to investigate whether the phenomenon can be described by neural networks and to determine the details of the network architecture so that the assumed criteria of accuracy, ability to prognose and repeatability would be complied. The methodology consisted of the following stages: experimental compression of foam specimens, choice of machine learning parameters, implementation of an algorithm for building different structures of artificial neural networks (ANNs), a two-step verification of the quality of built models and finally the choice of the most appropriate ones. The studied ANNs were two-layer feedforward networks with varying neuron numbers in the hidden layer. The following measures of evaluation were assumed: mean square error (MSE), sum of absolute errors (SAE) and mean absolute relative error (MARE). Obtained results show that networks trained with the assumed learning parameters which had 4 to 11 neurons in the hidden layer were appropriate for modelling and prognosing the compression of closed-cell aluminium in the assumed domains; however, they fulfilled accuracy and repeatability conditions differently. The network with six neurons in the hidden layer provided the best accuracy of prognosis at but little robustness. On the other hand, the structure with a complexity of 11 neurons gave a similar high-quality of prognosis at but with a much better robustness indication (80%). The results also allowed the determination of the minimum threshold of the accuracy of prognosis: . In conclusion, the research shows that the phenomenon of the compression of aluminium foam is able to be described by neural networks within the frames of made assumptions and allowed for the determination of detailed specifications of structure and learning parameters for building models with good-quality accuracy and robustness.

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Section: Introductionmentioning

confidence: 99%