@article{narayanasamy_iruthayasamy_perumal_ramasamy_2025,  title={Optimization of solar water heating absorber riser with header tube using RSM and CFD simulation},  volume={30},  ISSN={1517-7076},  url={https://doi.org/10.1590/1517-7076-RMAT-2024-0850},  DOI={10.1590/1517-7076-RMAT-2024-0850},  journal={Matéria (Rio de Janeiro)},  publisher={Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro, em cooperação com a Associação Brasileira do Hidrogênio, ABH2},  author={Narayanasamy, Sivakumar and Iruthayasamy, George and Perumal, Ramesh and Ramasamy, Kalaivanan},  year={2025},  pages={e20240850} }