CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators
This paper presents a numerical study of periodic fully developed turbulent airflow in a rectangular channel with double upstream V-baffles installed on the upper and lower walls of the channel in an in-line manner. Utilizing the OpenFOAM open-source software, this numerical research investigates th...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25003569 |
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| author | Abdulaziz Alasiri H.E. Fawaz |
| author_facet | Abdulaziz Alasiri H.E. Fawaz |
| author_sort | Abdulaziz Alasiri |
| collection | DOAJ |
| description | This paper presents a numerical study of periodic fully developed turbulent airflow in a rectangular channel with double upstream V-baffles installed on the upper and lower walls of the channel in an in-line manner. Utilizing the OpenFOAM open-source software, this numerical research investigates the impact of Re from 10,000 to 40,000 and BR from 0.3 to 0.5 on flow structure and heat transfer performance. An ANN model is constructed to estimate the local heat transfer coefficient using results obtained from the current CFD simulations and utilizing axial local distance (X/P), Re, and BR as ANN input parameters. The process of training incorporates the analysis of the loss function on training and validation data for controlling the weights and biases using backpropagation while feed forward propagate the selected input parameters. A total of 11 hidden layers consisting of 24 neurons each has been used in constructing the ANN, and the training process is optimized using the ADAM algorithm to minimize the loss function. The Final layer uses the linear activation function while all the hidden layers use the rectified Linear Units Activation function (ReLU). The ANN model demonstrates excellent predictive performance, yielding values close to 1 for R2 and r, along with extremely low values for MSE, MAPE, MSLE, and log-cosh loss (0.01, 0.6 %, 0.001, and 0.01, respectively), demonstrating the ANN model's high predictive accuracy. |
| format | Article |
| id | doaj-art-7dc7c09cf6024ce5a7201ba41be1fe4d |
| institution | DOAJ |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-7dc7c09cf6024ce5a7201ba41be1fe4d2025-08-20T03:20:22ZengElsevierCase Studies in Thermal Engineering2214-157X2025-07-017110609610.1016/j.csite.2025.106096CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulatorsAbdulaziz Alasiri0H.E. Fawaz1Department of Mechanical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 13318, Saudi ArabiaDepartment of Mechanical Engineering, National Research Centre, Giza, Egypt; Corresponding author.This paper presents a numerical study of periodic fully developed turbulent airflow in a rectangular channel with double upstream V-baffles installed on the upper and lower walls of the channel in an in-line manner. Utilizing the OpenFOAM open-source software, this numerical research investigates the impact of Re from 10,000 to 40,000 and BR from 0.3 to 0.5 on flow structure and heat transfer performance. An ANN model is constructed to estimate the local heat transfer coefficient using results obtained from the current CFD simulations and utilizing axial local distance (X/P), Re, and BR as ANN input parameters. The process of training incorporates the analysis of the loss function on training and validation data for controlling the weights and biases using backpropagation while feed forward propagate the selected input parameters. A total of 11 hidden layers consisting of 24 neurons each has been used in constructing the ANN, and the training process is optimized using the ADAM algorithm to minimize the loss function. The Final layer uses the linear activation function while all the hidden layers use the rectified Linear Units Activation function (ReLU). The ANN model demonstrates excellent predictive performance, yielding values close to 1 for R2 and r, along with extremely low values for MSE, MAPE, MSLE, and log-cosh loss (0.01, 0.6 %, 0.001, and 0.01, respectively), demonstrating the ANN model's high predictive accuracy.http://www.sciencedirect.com/science/article/pii/S2214157X25003569Cross flowTurbulent flowArtificial neural networkMultilayer perceptronBackpropagation algorithmV-baffle turbulators |
| spellingShingle | Abdulaziz Alasiri H.E. Fawaz CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators Case Studies in Thermal Engineering Cross flow Turbulent flow Artificial neural network Multilayer perceptron Backpropagation algorithm V-baffle turbulators |
| title | CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators |
| title_full | CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators |
| title_fullStr | CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators |
| title_full_unstemmed | CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators |
| title_short | CFD investigation and ANN prediction of heat transfer coefficient for fully developed turbulent air flow around double V-baffle turbulators |
| title_sort | cfd investigation and ann prediction of heat transfer coefficient for fully developed turbulent air flow around double v baffle turbulators |
| topic | Cross flow Turbulent flow Artificial neural network Multilayer perceptron Backpropagation algorithm V-baffle turbulators |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25003569 |
| work_keys_str_mv | AT abdulazizalasiri cfdinvestigationandannpredictionofheattransfercoefficientforfullydevelopedturbulentairflowarounddoublevbaffleturbulators AT hefawaz cfdinvestigationandannpredictionofheattransfercoefficientforfullydevelopedturbulentairflowarounddoublevbaffleturbulators |